Merge branch 'esp8266-native-framework-installer' into esp8266-native-library-backend

# Conflicts:
#	tests/unit_tests/test_main.py

docker/Dockerfile

@@ -22,7 +22,7 @@ RUN \
     -r /requirements.txt
 
 # Install the ESPHome Device Builder dashboard.
-RUN uv pip install --no-cache-dir esphome-device-builder==1.12.3
+RUN uv pip install --no-cache-dir esphome-device-builder==1.12.4
 
 RUN \
     platformio settings set enable_telemetry No \

esphome/__main__.py

@@ -762,9 +762,11 @@ def _wrap_to_code(name, comp, yaml_util):
     async def wrapped(conf):
         cg.add(cg.LineComment(f"{name}:"))
         if comp.config_schema is not None:
-            conf_str = yaml_util.dump(conf)
+            # sort_keys: voluptuous fills defaults in set order, so an
+            # unsorted dump would churn main.cpp and relink every run
+            conf_str = yaml_util.dump(conf, sort_keys=True)
             conf_str = conf_str.replace("//", "")
-            # remove tailing \ to avoid multi-line comment warning
+            # remove trailing \ to avoid multi-line comment warning
             conf_str = conf_str.replace("\\\n", "\n")
             cg.add(cg.LineComment(indent(conf_str)))
         await coro(conf)
@@ -855,7 +857,20 @@ def compile_program(args: ArgsProtocol, config: ConfigType) -> int:
         toolchain.create_factory_bin()
         toolchain.create_ota_bin()
         toolchain.create_elf_copy()
-        toolchain.get_idedata()
+        from esphome.build_helpers.idedata import IDEDATA_BEST_EFFORT_ERRORS
+
+        try:
+            if toolchain.get_idedata() is None:
+                _LOGGER.warning("No idedata was generated for this build")
+        except IDEDATA_BEST_EFFORT_ERRORS as err:
+            # The firmware already built; an idedata failure must not fail
+            # a successful build.
+            _LOGGER.warning(
+                "Could not generate idedata: %s (IDE, clang-tidy, and "
+                "memory-analysis data will be unavailable for this build)",
+                err,
+            )
+            _LOGGER.debug("Idedata failure detail", exc_info=True)
     else:
         from esphome.platformio import toolchain
 
@@ -2719,10 +2734,14 @@ def run_esphome(argv):
     # Skipped when -s overrides are passed, since the cache was written
     # against the previous substitution set.
     config: ConfigType | None = None
-    cache_eligible = (
+    cache_write_eligible = (
         args.command in ("upload", "logs") and not command_line_substitutions
     )
-    if cache_eligible:
+    # An explicit --toolchain must re-run the per-platform validators, so
+    # gate only the cache read; the refresh below saves the result unless
+    # the sidecar records a different toolchain.
+    cache_read_eligible = cache_write_eligible and args.toolchain is None
+    if cache_read_eligible:
         from esphome.compiled_config import load_compiled_config
 
         config = load_compiled_config(conf_path)
@@ -2746,17 +2765,14 @@ def run_esphome(argv):
             return 2
     CORE.config = config
 
-    # Fallback for platforms whose validators didn't set the toolchain
-    # (only the esp32 component reads esp32.framework.toolchain). All
-    # other platforms only support PlatformIO today. Must run before the
-    # cache refresh below so its sidecar records the same toolchain a
-    # compile would.
+    # The cache fast path skips validation, and legacy sidecars lack the
+    # toolchain field. Must run before the cache refresh below.
     if CORE.toolchain is None:
         CORE.toolchain = Toolchain.PLATFORMIO
 
     # Refresh the cache so the next upload/logs hits the fast path
     # instead of re-running read_config.
-    if cache_eligible and cache_missed:
+    if cache_write_eligible and cache_missed:
         from esphome.compiled_config import save_compiled_config_and_sidecar
 
         save_compiled_config_and_sidecar(config)

esphome/arduino/library.py

@@ -0,0 +1,511 @@
+"""Arduino-core backend for the shared PlatformIO library converter.
+
+Bundled names build straight from the framework tree; everything else goes
+through ``esphome.platformio.library``. Mirrors ``lib_ldf_mode=off``: each
+library builds its own archive; all include dirs join one global path.
+
+Deviations from PlatformIO: flat-layout libraries get the recursive default
+source filter; ``dot_a_linkage`` is honored; bundled libraries never run a
+manifest ``extraScript``; manifest ``-I`` flags join the global include path;
+``precompiled``/``ldflags`` properties are refused by name.
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+import logging
+from pathlib import Path
+import re
+
+from esphome.core import CORE, EsphomeError, Library
+from esphome.helpers import walk_files
+from esphome.platformio.extra_script import apply_extra_script
+from esphome.platformio.library import (
+    DEFAULT_BUILD_INCLUDE_DIR,
+    DEFAULT_BUILD_SRC_FILTER,
+    LIBRARY_HEADER_SUFFIXES,
+    SRC_FILE_EXTENSIONS,
+    ConvertedLibrary,
+    InvalidLibrary,
+    LibraryBackend,
+    _url_or_none,
+    check_library_data,
+    collect_filtered_files,
+    convert_libraries,
+    ensure_list,
+    is_lib_ignored,
+    lex_build_flags,
+    lib_ignore_set,
+    normalize_dependencies,
+    parse_library_json,
+    parse_library_properties,
+    warn_properties_depends,
+)
+
+_LOGGER = logging.getLogger(__name__)
+
+
+@dataclass
+class ArduinoLibrary:
+    """One resolved library, ready for the ninja generator."""
+
+    name: str
+    sources: list[Path] = field(default_factory=list)
+    include_dirs: list[Path] = field(default_factory=list)
+    # Extra compile flags private to this library's own sources
+    flags: list[str] = field(default_factory=list)
+    # PlatformIO's build.libArchive / Arduino's dot_a_linkage: when False the
+    # objects go to the linker directly (symbols nothing references survive)
+    lib_archive: bool = True
+    # Link inputs the library contributes (-L dirs / -l libs, e.g. from
+    # precompiled vendor blobs) and -Wl, options for the firmware link
+    link_dirs: list[Path] = field(default_factory=list)
+    link_libs: list[str] = field(default_factory=list)
+    link_flags: list[str] = field(default_factory=list)
+
+
+# Filename-plain names only: leading alnum/underscore, then word chars,
+# dot, space, plus, or hyphen. An allowlist excludes separators, drive
+# colons, and dot-only names by shape instead of enumerating them.
+_SAFE_LIBRARY_NAME_RE = re.compile(r"[A-Za-z0-9_][A-Za-z0-9_. +-]*\Z")
+
+
+def _is_safe_library_name(name: object) -> bool:
+    """Whether a name may be joined under the framework's libraries dir."""
+    return isinstance(name, str) and _SAFE_LIBRARY_NAME_RE.fullmatch(name) is not None
+
+
+def _manifest_build(name: str, data: object) -> dict:
+    """The manifest's ``build`` section; a malformed manifest must fail
+    naming the library, not with an AttributeError."""
+    build = data.get("build", {}) if isinstance(data, dict) else None
+    if not isinstance(build, dict):
+        raise EsphomeError(f"Library {name} has a malformed manifest")
+    return build
+
+
+def _resolve_src_dir(name: str, read_path: Path, build: dict) -> str:
+    """Resolve PIO's source dir: manifest srcDir, else src/Src, else the root."""
+    if "srcDir" not in build:
+        return next((d for d in ("src", "Src") if (read_path / d).is_dir()), ".")
+    # A declared srcDir (falsy included) that does not resolve is a
+    # manifest error
+    src_dir = build["srcDir"]
+    if not (isinstance(src_dir, str) and src_dir and (read_path / src_dir).is_dir()):
+        raise EsphomeError(
+            f"Library {name} declares srcDir {src_dir!r} which does not exist"
+        )
+    return src_dir
+
+
+def _reject_unsupported_link_fields(name: str, data: dict) -> None:
+    # PIO's Arduino lib builder honors these; building without them would
+    # fail at link with no stated cause. library.properties values are
+    # strings, so "false" (the spec's explicit opt-out) is not a declaration.
+    precompiled = data.get("precompiled")
+    if precompiled and str(precompiled).strip().lower() != "false":
+        raise EsphomeError(
+            f"Library {name} declares precompiled, which this backend does not support"
+        )
+    if data.get("ldflags"):
+        raise EsphomeError(
+            f"Library {name} declares ldflags, which this backend does not support"
+        )
+
+
+def _resolve_lib_archive(name: str, data: dict, build: dict) -> bool:
+    """build.libArchive, else dot_a_linkage (Arduino IDE's property, ignored
+    by PIO -- a deliberate extra), else archive."""
+
+    # Strict parse: bool("false") is True
+    def _parse(key: str, raw: object) -> bool:
+        if isinstance(raw, bool):
+            return raw
+        value = str(raw).strip().lower()
+        if value in ("true", "false"):
+            return value == "true"
+        raise EsphomeError(f"Library {name} has a malformed {key} value {raw!r}")
+
+    if "libArchive" in build:
+        return _parse("libArchive", build["libArchive"])
+    if "dot_a_linkage" in data:
+        return _parse("dot_a_linkage", data["dot_a_linkage"])
+    return True
+
+
+def _classify_build_flags(
+    name: str, read_path: Path, lib: ArduinoLibrary, flag_tokens: list[str]
+) -> list[str]:
+    """Route the lexed build.flags into the library's flag lists.
+
+    Returns the ``-I`` arguments for the include-dir resolution.
+    """
+    include_flags: list[str] = []
+    for tok in flag_tokens:
+        if tok.startswith("-I"):
+            include_flags.append(tok[2:])
+        elif tok.startswith("-L"):
+            link_dir = (read_path / tok[2:]).resolve()
+            if not link_dir.is_dir():
+                # Kept anyway (the linker ignores missing -L dirs); the
+                # warning names the culprit before a bare "cannot find -lfoo"
+                _LOGGER.warning(
+                    "Library %s declares library dir %s which does not exist",
+                    name,
+                    tok[2:],
+                )
+            lib.link_dirs.append(link_dir)
+        elif tok.startswith("-l"):
+            lib.link_libs.append(tok[2:])
+        elif tok.startswith("-Wl,"):
+            lib.link_flags.append(tok)
+        else:
+            lib.flags.append(tok)
+    return include_flags
+
+
+def _resolve_include_dirs(
+    name: str,
+    read_path: Path,
+    lib: ArduinoLibrary,
+    build: dict,
+    src_dir: str,
+    include_flags: list[str],
+) -> None:
+    include_dir = build.get("includeDir", DEFAULT_BUILD_INCLUDE_DIR)
+    if not isinstance(include_dir, str):
+        raise EsphomeError(f"Library {name} has a malformed includeDir")
+    for d, explicit in [
+        (include_dir, "includeDir" in build),
+        (src_dir, False),  # _resolve_src_dir already validated it
+        *((flag, True) for flag in include_flags),
+    ]:
+        if (path := (read_path / d)).is_dir():
+            lib.include_dirs.append(path.resolve())
+        elif explicit:
+            # Warn-and-drop is intended (unlike srcDir, which raises): a
+            # missing include dir is harmless until a header is actually
+            # needed, and the compile names it then
+            _LOGGER.warning(
+                "Library %s declares include dir %s which does not exist", name, d
+            )
+
+
+def _collect_lib_sources(
+    name: str,
+    read_path: Path,
+    lib: ArduinoLibrary,
+    src_dir: str,
+    src_filter: list[str],
+) -> None:
+    matched = collect_filtered_files(read_path / src_dir, src_filter)
+    lib.sources = sorted(
+        path.resolve()
+        for f in matched
+        if (path := Path(f)).suffix in SRC_FILE_EXTENSIONS
+    )
+    # A source-like suffix the case-sensitive map rejects (.CPP, .ino) is a
+    # dropped compilation unit that surfaces as undefined symbols at link;
+    # headers and metadata files fall through silently (header-only
+    # libraries are routine)
+    source_like = {s.lower() for s in SRC_FILE_EXTENSIONS} | {".ino"}
+    if dropped := [
+        Path(f).name
+        for f in matched
+        if Path(f).suffix not in SRC_FILE_EXTENSIONS
+        and Path(f).suffix.lower() in source_like
+    ]:
+        _LOGGER.warning(
+            "Library %s: %d file(s) with unmapped source suffixes are not compiled: %s",
+            name,
+            len(dropped),
+            ", ".join(sorted(dropped)),
+        )
+    if not lib.sources and not any(
+        Path(f).suffix.lower() in LIBRARY_HEADER_SUFFIXES for f in matched
+    ):
+        # Matched headers mean a header-only library; a filter matching
+        # nothing (or only inert files) is a manifest/tree problem whether
+        # or not it was declared. The truly empty tree raises via
+        # _assert_tree_has_code.
+        _LOGGER.warning("Library %s: no source files matched", name)
+
+
+def _library_info(name: str, read_path: Path, data: dict) -> ArduinoLibrary:
+    """Resolve one library's sources, include dirs, and flags (PIO semantics)."""
+    build = _manifest_build(name, data)
+    _reject_unsupported_link_fields(name, data)
+    src_dir = _resolve_src_dir(name, read_path, build)
+    src_filter = ensure_list(build.get("srcFilter", DEFAULT_BUILD_SRC_FILTER))
+    if not all(isinstance(entry, str) for entry in src_filter):
+        raise EsphomeError(f"Library {name} has a malformed srcFilter")
+    lib = ArduinoLibrary(name=name, lib_archive=_resolve_lib_archive(name, data, build))
+    # PlatformIO shell-lexes each build.flags entry
+    include_flags = _classify_build_flags(
+        name, read_path, lib, lex_build_flags(build.get("flags", []), f"library {name}")
+    )
+    _resolve_include_dirs(name, read_path, lib, build, src_dir, include_flags)
+    _collect_lib_sources(name, read_path, lib, src_dir, src_filter)
+    return lib
+
+
+def _bundled_library(framework_path: Path, name: str) -> ArduinoLibrary:
+    """A library bundled with the Arduino core, read from the framework tree.
+
+    ``library.json`` wins over ``library.properties`` when both exist, as in
+    PlatformIO's LibBuilderFactory; only the JSON manifest can carry a
+    ``build`` section (srcDir, srcFilter, flags).
+    """
+    lib_dir = framework_path / "libraries" / name
+    manifest_json = lib_dir / "library.json"
+    if manifest_json.is_file():
+        data = parse_library_json(manifest_json)
+    else:
+        manifest = lib_dir / "library.properties"
+        data = parse_library_properties(manifest) if manifest.is_file() else {}
+    if isinstance(data, dict):
+        # Bundled manifest deps are never walked; make the skip visible
+        if data.get("dependencies"):
+            _LOGGER.warning(
+                "Bundled library %s declares dependencies, which are not "
+                "resolved automatically; add them with add_library() if needed",
+                name,
+            )
+        warn_properties_depends(name, data)
+        build = data.get("build")
+        if isinstance(build, dict) and build.get("extraScript"):
+            # apply_extra_script only runs on the converted path; building
+            # without the script's flags would miscompile
+            raise EsphomeError(
+                f"Bundled library {name} declares an extraScript, which is "
+                "not run for bundled libraries"
+            )
+    lib = _library_info(name, lib_dir, data)
+    _assert_tree_has_code(
+        name,
+        lib_dir,
+        "the framework install may be incomplete (run 'esphome clean-all')",
+    )
+    return lib
+
+
+def _assert_tree_has_code(name: str, root: Path, hint: str) -> None:
+    """An empty or half-extracted tree can never link; fail by name (a
+    warning would scroll away and resurface as undefined symbols)."""
+    if not any(
+        Path(p).suffix in SRC_FILE_EXTENSIONS
+        or Path(p).suffix.lower() in LIBRARY_HEADER_SUFFIXES
+        for p in walk_files(root)
+    ):
+        raise EsphomeError(f"Library {name} has no sources or headers; {hint}")
+
+
+def _external_short_name(name: str) -> str:
+    """The short library name of a requested spec.
+
+    "owner/Name" and plain names take the last path segment; the
+    "Name=<url>" custom-name form takes the declared name (the URL tail is
+    a repository path, not a library name). Git tails (".git", "#ref") are
+    stripped like the walk's own URL normalization -- deliberately further
+    than CORE.add_library's keying, because the comparand here is a manifest
+    dependency name, never a spec.
+    """
+    head, sep, tail = name.partition("=")
+    if sep and "://" in tail:
+        return head
+    short = name.rsplit("/", maxsplit=1)[-1]
+    return short.partition("#")[0].removesuffix(".git")
+
+
+def _warn_unfulfilled_provides(
+    provided_requests: list[str], satisfied: set[str]
+) -> None:
+    """Reconcile the provides() promise: every dependency the walk skipped
+    on the backend's word must have been added from the framework tree (or
+    knowingly satisfied by a converted/external library); an unfulfilled
+    promise would surface only as undefined symbols at link."""
+    for name in provided_requests:
+        if name not in satisfied:
+            _LOGGER.warning(
+                "provides() skipped dependency %s but nothing added it; "
+                "the build is missing a library",
+                name,
+            )
+
+
+def resolve_libraries(
+    framework_path: Path, *, pio_platform: str, board_mcu: str, cache_key: str
+) -> list[ArduinoLibrary]:
+    """Resolve every ``cg.add_library()`` entry into an :class:`ArduinoLibrary`.
+
+    ``pio_platform``/``board_mcu`` filter manifests the way PlatformIO would
+    for that core (e.g. ``espressif8266``/``esp8266``); ``cache_key`` keys the
+    shared converter's download cache.
+
+    The returned list is not topologically sorted, so the caller must link
+    the archives inside one ``--start-group``/``--end-group`` pair (the
+    bundled-first grouping is incidental).
+    """
+    bundled: list[ArduinoLibrary] = []
+    external: list[Library] = []
+    # PlatformIO's lib_ignore covers framework-bundled libraries too; the
+    # shared converter only filters the registry/git ones.
+    lib_ignore = lib_ignore_set()
+    # Exact on-disk directory names, so membership is case-sensitive on
+    # every filesystem (a per-name is_dir() probe would match "wire" on
+    # macOS/Windows and build the bundled Wire twice); the safety guard
+    # stays fused with the lookup (path traversal)
+    libraries_dir = framework_path / "libraries"
+    if not libraries_dir.is_dir():
+        # Falling back to the registry would fail later with a misleading
+        # package-not-found error for every bundled name
+        raise EsphomeError(
+            f"{libraries_dir} is missing; the framework install may be "
+            "incomplete (run 'esphome clean-all')"
+        )
+    bundled_dir_names = frozenset(p.name for p in libraries_dir.iterdir() if p.is_dir())
+
+    def _provided(name: object) -> bool:
+        return _is_safe_library_name(name) and name in bundled_dir_names
+
+    for library in CORE.platformio_libraries.values():
+        if is_lib_ignored(library.name, lib_ignore):
+            continue
+        # Bundled only for a bare name with a matching framework dir; pinned
+        # or unmatched names resolve from the registry, as under PlatformIO.
+        if not library.repository and not library.version and _provided(library.name):
+            # Bundled libraries' own manifest deps are not walked (none of
+            # the ESP8266 core's declare any; _bundled_library warns if one does)
+            bundled.append(_bundled_library(framework_path, library.name))
+        else:
+            external.append(library)
+
+    converted: list[ArduinoLibrary] = []
+    bundled_names = {lib.name for lib in bundled}
+    converted_manifest_names: set[str] = set()
+    # Ordered set of bundled dependency names to add once conversion is done
+    pending_bundled: dict[str, None] = {}
+    # Deps matching a separately-requested external are already in the build
+    # (a duplicate archive means duplicate-symbol link errors)
+    external_short_names = {
+        _external_short_name(lib.name) for lib in external if lib.name
+    }
+
+    def _add_bundled_dependencies(component: ConvertedLibrary) -> None:
+        # A version-less bare-name dependency ("Hash" in ESPAsyncWebServer)
+        # is a core-bundled library; the shared converter skips it because
+        # it cannot be resolved from the registry.
+        for dep in normalize_dependencies(
+            component.data.get("dependencies"), component.name
+        ):
+            name = dep.get("name")
+            if isinstance(name, str) and "/" in name:
+                owner, _, pkg = name.partition("/")
+                if _is_safe_library_name(owner) and _is_safe_library_name(pkg):
+                    # PIO's owner-qualified spelling ("Owner/Pkg"); the
+                    # converter resolves it from the registry
+                    continue
+            if not _is_safe_library_name(name):
+                # The name becomes a path component under the framework
+                # tree; never join a traversal or a non-string
+                _LOGGER.warning(
+                    "Ignoring malformed dependency entry %r of library %s",
+                    dep,
+                    component.name,
+                )
+                continue
+            if name in external_short_names:
+                if _provided(name):
+                    # A bundled copy really is suppressed; an accidental
+                    # short-name collision would surface as link errors
+                    _LOGGER.warning(
+                        "Dependency %s of %s is assumed satisfied by a "
+                        "requested external library; the bundled copy is "
+                        "not added",
+                        name,
+                        component.name,
+                    )
+                else:
+                    _LOGGER.debug(
+                        "Dependency %s of %s assumed satisfied by a requested "
+                        "external library",
+                        name,
+                        component.name,
+                    )
+                continue
+            if name in bundled_names or is_lib_ignored(name, lib_ignore):
+                continue
+            if _url_or_none(dep.get("version")) is not None:
+                # A URL names one specific source (the walk resolves it as
+                # git); the bundled copy must never be added on top
+                continue
+            if dep.get("owner") or not _provided(name):
+                # Owner-less names in the framework tree prefer the bundled
+                # copy (PIO's process_dependencies); everything else resolves
+                # via the converter, and the walk reports any real drops
+                continue
+            try:
+                # framework=None: the walk already ran dependency_is_usable
+                # on this entry and warned for any non-platform cause, so
+                # debug here is what keeps one manifest fault from warning
+                # twice. That invariant is pinned by
+                # test_nonplatform_rejection_warns_once_through_real_converter,
+                # which fails if the walk stops evaluating these deps.
+                check_library_data(dep, pio_platform, None)
+            except InvalidLibrary as err:
+                _LOGGER.debug("Skip bundled candidate %s: %s", name, err)
+                continue
+            # Deferred: a later-emitted library's manifest name may satisfy
+            # this; adding now could double the archive
+            pending_bundled.setdefault(name)
+
+    def _emit(component: ConvertedLibrary) -> None:
+        apply_extra_script(
+            component, board_mcu=lambda: board_mcu, pio_platform=pio_platform
+        )
+        _assert_tree_has_code(
+            component.get_require_name(),
+            component.source_dir,
+            "the download may be incomplete (run 'esphome clean-all')",
+        )
+        if isinstance(manifest_name := component.data.get("name"), str):
+            converted_manifest_names.add(manifest_name)
+        converted.append(
+            _library_info(
+                component.get_require_name(), component.source_dir, component.data
+            )
+        )
+        _add_bundled_dependencies(component)
+
+    backend = LibraryBackend(
+        platform=pio_platform,
+        framework="arduino",
+        emit=_emit,
+        cache_key=cache_key,
+        # The walk must not resolve bundled names from the registry;
+        # _add_bundled_dependencies adds them after emit
+        provides=_provided,
+    )
+    if external:
+        convert_libraries(external, backend)
+    for name in pending_bundled:
+        if name in converted_manifest_names:
+            # Manifest-name evidence: the converted library is this library,
+            # so the bundled copy would double the archive. Warn like the
+            # external_short_names twin: a coincidental collision would
+            # otherwise surface only as link errors
+            _LOGGER.warning(
+                "Dependency %s is assumed satisfied by a converted library's "
+                "manifest name; the bundled copy is not added",
+                name,
+            )
+            continue
+        bundled_names.add(name)
+        bundled.append(_bundled_library(framework_path, name))
+
+    _warn_unfulfilled_provides(
+        backend.provided_requests,
+        bundled_names | converted_manifest_names | external_short_names,
+    )
+
+    return bundled + converted

esphome/arduino8266/__init__.py

@@ -0,0 +1,9 @@
+"""Native (PlatformIO-free) build support for the ESP8266 Arduino core.
+
+This package downloads the Arduino ESP8266 core and the xtensa-lx106
+toolchain, generates a ninja build for them plus the ESPHome sources, and
+drives the build directly — the ESP8266 equivalent of ``esphome.espidf``.
+
+Deliberately importable without the esp8266 component to avoid circular
+imports; the component wires these modules in via lazy imports.
+"""

esphome/arduino8266/framework.py

@@ -0,0 +1,164 @@
+"""Download and install the Arduino ESP8266 core, toolchain, and ninja.
+
+Artifacts land in a machine-global cache (shared across projects, like the
+ESP-IDF install in ``esphome.espidf.framework``):
+
+    <cache>/arduino8266/frameworks/<version>/   framework-arduinoespressif8266
+    <cache>/arduino8266/toolchains/<version>/   toolchain-xtensa (gcc 10.3)
+
+Packages come from the PlatformIO registry (identical bits to the PlatformIO
+backend); ``ESPHOME_ARDUINO8266_*_MIRRORS`` overrides the URLs. ninja comes
+from PATH or the ninja PyPI wheel.
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+from typing import NamedTuple
+
+from esphome.build_helpers.ccache import ccache_defaults_env
+from esphome.build_helpers.ninja import find_ninja
+from esphome.build_helpers.tools_cache import ARDUINO8266_TOOLS_CACHE, tools_cache_path
+from esphome.core import EsphomeError, Version
+from esphome.framework_helpers import str_to_lst_of_str
+from esphome.platformio.registry import install_package, prefetch_packages
+
+FRAMEWORK_PACKAGE = "framework-arduinoespressif8266"
+TOOLCHAIN_PACKAGE = "toolchain-xtensa"
+# gcc 10.3, the toolchain Arduino core 3.x builds with; the build
+# generator's compile flags are tuned to it.
+TOOLCHAIN_VERSION = "2.100300.220621"
+
+ESPHOME_ARDUINO8266_FRAMEWORK_MIRRORS = str_to_lst_of_str(
+    os.environ.get("ESPHOME_ARDUINO8266_FRAMEWORK_MIRRORS", "")
+)
+ESPHOME_ARDUINO8266_TOOLCHAIN_MIRRORS = str_to_lst_of_str(
+    os.environ.get("ESPHOME_ARDUINO8266_TOOLCHAIN_MIRRORS", "")
+)
+
+
+def get_arduino8266_tools_path() -> Path:
+    # Machine-global so all projects share one install; see
+    # espidf.framework.get_idf_tools_path for the location rationale.
+    return tools_cache_path(*ARDUINO8266_TOOLS_CACHE)
+
+
+# 3.1.1 rather than 3.1.0: the registry has no package for 3.1.0, and the
+# encoder below cannot name 3.0.0/3.0.1 either (see its docstring)
+MIN_FRAMEWORK_VERSION = Version(3, 1, 1)
+
+
+def framework_package_version(ver: Version) -> str:
+    """Map an Arduino core version to its registry package version (3.1.2 ->
+    3.30102.0; the leading 3 is the package major).
+
+    Exact registry names only for cores > 2.6.2 and >= 3.0.2; callers floor
+    at MIN_FRAMEWORK_VERSION.
+    """
+    if ver.major > 3:
+        raise EsphomeError(
+            f"Arduino core {ver} is not supported yet; "
+            "the newest known core series is 3.x"
+        )
+    if ver <= Version(2, 6, 2):
+        # Cores <= 2.6.2 use the older 1.x/2.x package-major encodings (same
+        # boundary as _format_framework_arduino_version's era guard)
+        raise EsphomeError(
+            f"Arduino core {ver} uses an older package encoding than this "
+            "helper implements (newer than 2.6.2)"
+        )
+    return f"3.{ver.major}{ver.minor:02d}{ver.patch:02d}.0"
+
+
+def get_framework_path(package_version: str) -> Path:
+    return get_arduino8266_tools_path() / "frameworks" / package_version
+
+
+def get_toolchain_path() -> Path:
+    return get_arduino8266_tools_path() / "toolchains" / TOOLCHAIN_VERSION
+
+
+class InstalledPaths(NamedTuple):
+    """Locations of the installed framework, toolchain, and ninja binary."""
+
+    framework: Path
+    toolchain: Path
+    ninja: Path
+
+
+def check_and_install(framework_version: Version) -> InstalledPaths:
+    """Ensure framework, toolchain, and ninja are installed; return their paths."""
+    if framework_version < MIN_FRAMEWORK_VERSION:
+        # Config validation enforces this too; keep the module honest when
+        # called directly.
+        raise EsphomeError(
+            f"The native toolchain requires the Arduino core "
+            f">= {MIN_FRAMEWORK_VERSION}, got {framework_version}"
+        )
+    # Probe the cheap local dependency before ~110 MB of downloads
+    ninja_path = find_ninja()
+    package_version = framework_package_version(framework_version)
+    framework_path = get_framework_path(package_version)
+    downloads_dir = get_arduino8266_tools_path() / "downloads"
+    toolchain_path = get_toolchain_path()
+    # One spec per package: the prefetch and the installs must agree
+    specs = (
+        (
+            FRAMEWORK_PACKAGE,
+            package_version,
+            framework_path,
+            ESPHOME_ARDUINO8266_FRAMEWORK_MIRRORS,
+            ("cores/esp8266", "tools/sdk", "libraries"),
+        ),
+        (
+            TOOLCHAIN_PACKAGE,
+            TOOLCHAIN_VERSION,
+            toolchain_path,
+            ESPHOME_ARDUINO8266_TOOLCHAIN_MIRRORS,
+            # xtensa-lx106-elf pins the target: every gcc package has a bin/
+            ("bin", "xtensa-lx106-elf"),
+        ),
+    )
+    # Fetch both archives at once; the installs below verify and extract
+    prefetch_packages([spec[:4] for spec in specs], downloads_dir)
+    for name, version, dest, mirrors, expect in specs:
+        install_package(name, version, dest, mirrors, downloads_dir, expect=expect)
+    return InstalledPaths(
+        framework=framework_path, toolchain=toolchain_path, ninja=ninja_path
+    )
+
+
+def toolchain_tool(toolchain_path: Path, name: str) -> Path:
+    """Path to one toolchain tool (gcc, g++, ar, size, addr2line, ...).
+
+    The single owner of the ``bin/xtensa-lx106-elf-<name>`` layout and the
+    Windows suffix, so a toolchain package bump touches one spot.
+    """
+    suffix = ".exe" if os.name == "nt" else ""
+    return toolchain_path / "bin" / f"xtensa-lx106-elf-{name}{suffix}"
+
+
+def get_build_env(toolchain_path: Path, ccache: str | None) -> dict[str, str]:
+    env = os.environ.copy()
+    # Drop empty entries: a trailing separator from an absent PATH would
+    # make the shell search the current directory for tools
+    parts = [
+        str(toolchain_path / "bin"),
+        *filter(None, env.get("PATH", "").split(os.pathsep)),
+    ]
+    env["PATH"] = os.pathsep.join(parts)
+    env.update(ccache_env(ccache))
+    return env
+
+
+def ccache_env(ccache: str | None) -> dict[str, str]:
+    """Return ccache settings for the build subprocess (not os.environ).
+
+    ``ccache`` is the pre-resolved binary (resolve_ccache_path), or None
+    when disabled. Values the user already set in the environment are
+    respected.
+    """
+    if ccache is None:
+        return {}
+    return ccache_defaults_env(get_arduino8266_tools_path() / "ccache")

esphome/build_gen/build_tool.py

@@ -0,0 +1,107 @@
+"""Tiny cross-platform build steps invoked from the generated ninja file.
+
+Plain script (not ``python -m``): it runs from ninja with whatever Python
+started esphome and must not depend on the package being importable.
+
+Subcommands:
+    ar <ar-binary> <archive> <rspfile>   remove stale archive, then ``ar rc``
+    copy <src> <dst>                     copy a file
+
+The ar rspfile carries one object path per line (the generating rule must
+use ``$in_newline``, never ``$in``).
+"""
+
+from pathlib import Path
+import shutil
+import subprocess
+import sys
+
+
+def _read_rspfile(rspfile: str) -> list[str]:
+    r"""The object paths listed in ``rspfile``, unquoted.
+
+    GNU ar treats backslashes in response files as escapes (corrupts
+    Windows paths), so the caller expands the list into argv; strip the
+    simple surrounding quote ninja adds to special paths, then undo
+    ninja's POSIX escape for an embedded quote ('a'\\''b.o' -> a'b.o).
+    """
+    return [
+        line[1:-1].replace("'\\''", "'")
+        if len(line) >= 2 and line[0] == line[-1] and line[0] in "'\""
+        else line
+        for line in Path(rspfile).read_text(encoding="utf-8").splitlines()
+        if line
+    ]
+
+
+def _run_ar(ar: str, archive: str, rspfile: str) -> int:
+    # Remove first: ``ar rc`` replaces members but never drops ones whose
+    # source was removed from the build, which would leak stale objects.
+    Path(archive).unlink(missing_ok=True)
+    objects = _read_rspfile(rspfile)
+    if not objects:
+        # An empty archive would "succeed" here and fail far away at link
+        print(f"ar: no objects listed in {rspfile} for {archive}", file=sys.stderr)
+        return 1
+    # Batch by argv length: expanding the rspfile gives back the Windows
+    # 32767-char command-line limit it existed to avoid. "rc" creates,
+    # "q" appends the remainder.
+    op = "rc"
+    ok = False
+    try:
+        while objects:
+            batch = [objects.pop(0)]
+            batch_len = len(batch[0])
+            while objects and batch_len + len(objects[0]) < 25000:
+                batch_len += len(objects[0]) + 1
+                batch.append(objects.pop(0))
+            rc = subprocess.run(
+                [ar, op, archive, *batch], check=False, close_fds=False
+            ).returncode
+            if rc != 0:
+                return rc
+            op = "q"
+        ok = True
+        return 0
+    finally:
+        if not ok:
+            # Any failure (bad exit, missing ar binary, interrupt) must not
+            # leave a truncated archive behind
+            Path(archive).unlink(missing_ok=True)
+
+
+def _run_copy(src: str, dst: str) -> int:
+    try:
+        shutil.copyfile(src, dst)
+    except OSError as err:
+        # Never leave a partially written output (e.g. a firmware image);
+        # SameFileError means dst IS src, where unlinking destroys the input
+        if not isinstance(err, shutil.SameFileError):
+            Path(dst).unlink(missing_ok=True)
+        raise
+    return 0
+
+
+# mode -> (handler, expected operand count); surplus argv means a
+# mis-specified ninja rule and must error, not silently drop operands
+_MODES = {"ar": (_run_ar, 3), "copy": (_run_copy, 2)}
+
+
+def main() -> int:
+    mode = sys.argv[1] if len(sys.argv) > 1 else ""
+    if entry := _MODES.get(mode):
+        handler, argc = entry
+        args = sys.argv[2:]
+        if len(args) != argc:
+            print(
+                f"build_tool {mode}: expected {argc} arguments, got {len(args)}",
+                file=sys.stderr,
+            )
+            return 1
+        return handler(*args)
+    print(f"unknown build_tool mode: {mode}", file=sys.stderr)
+    return 1
+
+
+if __name__ == "__main__":  # pragma: no cover
+    sys.exit(main())

esphome/build_helpers/__init__.py

@@ -0,0 +1 @@
+"""Build helpers shared by the native (non-PlatformIO) toolchains."""

esphome/build_helpers/ccache.py

@@ -0,0 +1,93 @@
+"""Shared ccache policy for build backends: env-knob parsing, binary
+resolution, and default ``CCACHE_*`` values."""
+
+from __future__ import annotations
+
+import logging
+import os
+from pathlib import Path
+
+from esphome.framework_helpers import strip_win_long_path_prefix, tool_version_runs
+from esphome.helpers import FALSY_BOOL_STRINGS, TRUTHY_BOOL_STRINGS
+
+_LOGGER = logging.getLogger(__name__)
+
+# cv.boolean's spelling tables plus the 1/0 env convention
+TRUTHY_ENV_STRINGS = TRUTHY_BOOL_STRINGS | {"1"}
+FALSY_ENV_STRINGS = FALSY_BOOL_STRINGS | {"0"}
+
+
+def _ccache_runs(ccache: str) -> bool:
+    """Return True when the ``ccache`` found on PATH actually runs."""
+    return tool_version_runs(
+        ccache,
+        "Ignoring ccache at %s because it failed to run; compiling without ccache",
+    )
+
+
+def parse_enable_env(name: str) -> bool | None:
+    """Strictly parse an on/off environment knob; None when unset or invalid.
+
+    ``bool(str)`` truthiness would flip ``no``/``off`` to enabled, so only
+    1/true/yes/on and 0/false/no/off count; anything else warns and reads
+    as unset so the caller's default policy applies.
+    """
+    raw = os.environ.get(name)
+    if raw is None:
+        return None
+    lowered = raw.strip().lower()
+    if lowered in TRUTHY_ENV_STRINGS:
+        return True
+    if lowered in FALSY_ENV_STRINGS:
+        return False
+    _LOGGER.warning("Ignoring unrecognized %s=%r; use 1 or 0", name, raw)
+    return None
+
+
+def resolve_ccache_path() -> str | None:
+    """The ccache binary to wrap compiles with, or None when disabled.
+
+    An explicit ``ESPHOME_CCACHE_ENABLE=1`` skips the runnability probe; the
+    Windows extended-length prefix is stripped before probing (#18399).
+    """
+    import shutil
+
+    explicit = parse_enable_env("ESPHOME_CCACHE_ENABLE")
+    if explicit is False:
+        return None
+    ccache = shutil.which("ccache")
+    if ccache is None:
+        if explicit:
+            _LOGGER.warning(
+                "ESPHOME_CCACHE_ENABLE is set but no ccache binary is on PATH; "
+                "compiling without ccache"
+            )
+        return None
+    ccache = strip_win_long_path_prefix(ccache)
+    if not explicit and not _ccache_runs(ccache):
+        return None
+    return ccache
+
+
+def ccache_defaults_env(cache_dir: Path) -> dict[str, str]:
+    """Default ``CCACHE_*`` values for a build subprocess (not os.environ).
+
+    Values the user already set in the environment are respected. Depend
+    mode is on: both native backends emit depfiles (-MMD / CMake), which
+    keeps cache-miss overhead low.
+    """
+    from esphome.core import CORE
+
+    # An unset build_path means the env was built before preload; fail loudly
+    # rather than silently drop CCACHE_BASEDIR.
+    if CORE.build_path is None:
+        raise ValueError(
+            "CORE.build_path must be set before constructing the build environment"
+        )
+    defaults = {
+        "CCACHE_DIR": str(cache_dir),
+        "CCACHE_NOHASHDIR": "true",
+        "CCACHE_DEPEND": "1",
+        "CCACHE_BASEDIR": str(Path(CORE.build_path).resolve()),
+    }
+    return {k: v for k, v in defaults.items() if k not in os.environ}

esphome/build_helpers/idedata.py

@@ -1,10 +1,10 @@
-"""Derive idedata from an ESP-IDF native-toolchain ``compile_commands.json``.
+"""Derive idedata from a native (non-PlatformIO) build's ``compile_commands.json``.
 
-PlatformIO exposes a curated ``pio run -t idedata`` JSON; the native ESP-IDF
-toolchain has no such command, but its CMake build emits
-``build/compile_commands.json`` (CMAKE_EXPORT_COMPILE_COMMANDS). This module
-turns that file into the same fields consumers (IDE integration, clang-tidy)
-expect:
+PlatformIO exposes a curated ``pio run -t idedata`` JSON; the native
+toolchains have no such command, but each build produces a
+``compile_commands.json`` (CMAKE_EXPORT_COMPILE_COMMANDS for ESP-IDF, ninja's
+compdb tool otherwise). This module turns that file into the same fields
+consumers (IDE integration, clang-tidy) expect:
 
     {cc_path, cxx_path, cxx_flags, defines, includes: {build, toolchain}}
 """
@@ -18,6 +18,20 @@ from pathlib import Path
 import shlex
 import subprocess
 
+from esphome.core import EsphomeError
+from esphome.helpers import write_file
+
+# Everything idedata generation may raise after a successful link. Broad on
+# purpose, and shared by every consumer: idedata is a bonus artifact, so
+# these must be caught and warned about, never allowed to fail the build.
+IDEDATA_BEST_EFFORT_ERRORS = (
+    EsphomeError,
+    LookupError,
+    OSError,
+    RuntimeError,
+    ValueError,
+)
+
 _LOGGER = logging.getLogger(__name__)
 
 # C++ translation-unit suffixes used to identify ESPHome source files.
@@ -120,7 +134,18 @@ def _pick_entry(entries: list[dict]) -> dict:
     raise ValueError("no C++ translation unit found in compile_commands.json")
 
 
-def _parse_entry(entry: dict) -> tuple[str, list[str], list[str], list[str]]:
+# Compiler launchers that may prefix a compile command; a closed launcher
+# denylist beats enumerating compiler names, an open set.
+_LAUNCHER_STEMS = frozenset({"ccache", "sccache", "distcc", "icecc", "buildcache"})
+
+
+def _is_launcher(token: str) -> bool:
+    return Path(token).stem.lower() in _LAUNCHER_STEMS
+
+
+def parse_entry(
+    entry: dict, launcher: str | None = None
+) -> tuple[str, list[str], list[str], list[str]]:
     """Parse one compile_commands entry -> (cxx_path, defines, includes, cxx_flags)."""
     directory = Path(entry["directory"])
     tokens = _expand_response_files(_split_command(entry["command"]), directory)
@@ -136,6 +161,20 @@ def _parse_entry(entry: dict) -> tuple[str, list[str], list[str], list[str]]:
             raw = os.path.normpath(directory / raw)
         return raw.replace("\\", "/")
 
+    # A launcher-wrapped command ("ccache g++ ...") names the compiler second
+    if launcher is not None and tokens[:1] == [launcher]:
+        tokens = tokens[1:]
+    if not tokens:
+        # _split_command("") is [] by design, and a command that is only
+        # the launcher strips to nothing; fail like _pick_entry does
+        # instead of an IndexError traceback
+        raise ValueError(f"empty compile command for {entry.get('file')}")
+    if _is_launcher(tokens[0]) and len(tokens) > 1 and not tokens[1].startswith("-"):
+        # A stale compile DB built with a launcher the current run no longer
+        # configures: the real compiler is the next token. Warn: the DB is
+        # stale and worth regenerating.
+        _LOGGER.warning("Stripping unconfigured launcher %s", tokens[0])
+        tokens = tokens[1:]
     # token0 is the compiler path; the rest of the command already uses forward
     # slashes on Windows, so normalize it too for a consistent idedata file.
     cxx_path = tokens[0].replace("\\", "/")
@@ -168,7 +207,7 @@ def _parse_entry(entry: dict) -> tuple[str, list[str], list[str], list[str]]:
     return cxx_path, defines, includes, cxx_flags
 
 
-def _get_toolchain_includes(cxx_path: str) -> list[str]:
+def get_toolchain_includes(cxx_path: str) -> list[str]:
     """Query the compiler for its builtin ``#include <...>`` search dirs."""
     result = subprocess.run(
         [cxx_path, "-E", "-x", "c++", "-", "-v"],
@@ -219,26 +258,114 @@ def _cc_path_from_cxx(cxx_path: str) -> str:
     return f"{stem}{suffix}"
 
 
-def idedata_from_build(compile_commands: Path) -> dict:
+def load_or_build_idedata(
+    compile_commands: Path,
+    elf_path: Path,
+    cache: Path,
+    launcher: str | None = None,
+) -> dict | None:
+    """Return idedata for a compile_commands.json build, cached on mtime.
+
+    Shared by the native ESP-IDF and ESP8266 Arduino toolchains. Returns None
+    when the compile DB doesn't exist yet (nothing was built). ``launcher``
+    is the compiler-launcher path (ccache) the build was generated with, if
+    any; commands in the compile DB are prefixed with it.
+    """
+    if not compile_commands.is_file():
+        _LOGGER.debug("No %s yet; skipping idedata generation", compile_commands)
+        return None
+
+    if cache.is_file() and cache.stat().st_mtime >= compile_commands.stat().st_mtime:
+        try:
+            cached = json.loads(cache.read_text(encoding="utf-8"))
+        except (ValueError, OSError) as err:
+            # A recurring cause (interrupted write, disk full) would otherwise
+            # look like unexplained slow builds
+            _LOGGER.warning("Discarding unreadable idedata cache %s: %s", cache, err)
+        else:
+            # Rebuild pre-cc_path caches on the field, not the timestamp;
+            # the type check keeps "in" from substring-matching a string
+            if isinstance(cached, dict) and "cc_path" in cached:
+                return cached
+
+    data = idedata_from_build(compile_commands, launcher)
+    data["prog_path"] = str(elf_path)
+    cache.parent.mkdir(parents=True, exist_ok=True)
+    # Atomic so a crash mid-write cannot leave a truncated cache
+    write_file(cache, json.dumps(data, indent=2) + "\n")
+    return data
+
+
+def reject_launcher_compiler(cxx_path: str) -> None:
+    """Reject a compile DB that names a launcher (ccache) as the compiler.
+
+    Reject before the toolchain probe, which would fail opaquely on a
+    launcher; the unusable compile DB must never be cached or consumed.
+    """
+    if _is_launcher(cxx_path):
+        raise EsphomeError(
+            f"compile_commands.json names the launcher {cxx_path} as the "
+            "compiler; the compile database is unusable"
+        )
+
+
+def idedata_from_build(compile_commands: Path, launcher: str | None = None) -> dict:
     """Parse compile_commands.json into the idedata fields consumers expect.
 
-    A single ESP-IDF compile entry only carries its own component's REQUIRES
-    include set, but consumers (clang-tidy) analyze ESPHome headers that
-    transitively pull in other components. So take cxx_path / cxx_flags /
-    defines from a representative ESPHome TU, but union the include dirs across
-    all ESPHome TUs to get a project-wide superset (as PlatformIO's idedata
-    provides).
+    A single compile entry only carries the include set its own translation
+    unit was built with (per-component under ESP-IDF), but consumers
+    (clang-tidy) analyze ESPHome headers that transitively pull in other
+    components. So take cxx_path / cxx_flags / defines from a representative
+    ESPHome TU, but union the include dirs across all ESPHome TUs to get a
+    project-wide superset (as PlatformIO's idedata provides).
     """
     entries = json.loads(Path(compile_commands).read_text(encoding="utf-8"))
-    cxx_path, defines, _, cxx_flags = _parse_entry(_pick_entry(entries))
 
-    build_includes: dict[str, None] = {}
+    representative = _pick_entry(entries)
+    cxx_path, defines, rep_includes, cxx_flags = parse_entry(representative, launcher)
+    reject_launcher_compiler(cxx_path)
+
+    # Seed with the representative's includes so it is not parsed twice
+    has_esphome_tu = _is_esphome_src(representative["file"])
+    build_includes: dict[str, None] = dict.fromkeys(
+        rep_includes if has_esphome_tu else ()
+    )
+
+    def _shape(entry: dict) -> str:
+        # The command minus its TU-specific paths: entries sharing a shape
+        # carry identical include sets (one ninja rule), so tokenize once
+        # per shape instead of once per TU. Response-file commands never
+        # dedupe: per-object .rsp names strip to one shape while the files
+        # may hold different include sets.
+        command = entry["command"]
+        if "@" in command:
+            return f"unique:{entry['file']}"
+        return command.replace(entry.get("file", ""), "").replace(
+            entry.get("output", ""), ""
+        )
+
+    seen_shapes = {_shape(representative)}
     for entry in entries:
-        if not _is_esphome_src(entry["file"]):
+        if entry is representative or not _is_esphome_src(entry["file"]):
             continue
-        for inc in _parse_entry(entry)[2]:
+        has_esphome_tu = True
+        if (shape := _shape(entry)) in seen_shapes:
+            _LOGGER.debug("Include union: %s shares a command shape", entry["file"])
+            continue
+        seen_shapes.add(shape)
+        for inc in parse_entry(entry, launcher)[2]:
             build_includes.setdefault(inc, None)
 
+    if not has_esphome_tu:
+        # _pick_entry fell back to an arbitrary C++ entry: idedata built
+        # from it breaks clang-tidy/IDE consumers, and a one-time warning
+        # would be cached into permanence. The best-effort call sites
+        # downgrade this to a build warning.
+        raise EsphomeError(
+            f"No ESPHome translation unit found in {compile_commands}; "
+            "refusing to cache unusable idedata"
+        )
+
     return {
         "cc_path": _cc_path_from_cxx(cxx_path),
         "cxx_path": cxx_path,
@@ -246,6 +373,6 @@ def idedata_from_build(compile_commands: Path) -> dict:
         "defines": defines,
         "includes": {
             "build": list(build_includes),
-            "toolchain": _get_toolchain_includes(cxx_path),
+            "toolchain": get_toolchain_includes(cxx_path),
         },
     }

esphome/build_helpers/ninja.py

@@ -0,0 +1,92 @@
+"""Platform-neutral helpers for ninja-driven native builds."""
+
+from __future__ import annotations
+
+import logging
+import os
+from pathlib import Path
+import re
+import shutil
+
+from esphome.core import EsphomeError
+from esphome.framework_helpers import strip_win_long_path_prefix, tool_version_runs
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def _ninja_runs(binary: str) -> bool:
+    """Whether the ninja found on PATH actually runs (see tool_version_runs)."""
+    return tool_version_runs(
+        binary,
+        "Ignoring ninja at %s because it failed to run; "
+        "falling back to the bundled wheel",
+    )
+
+
+def find_ninja() -> Path:
+    """Locate the ninja binary: a runnable PATH hit first, else the ninja
+    PyPI wheel."""
+    if binary := shutil.which("ninja"):
+        binary = strip_win_long_path_prefix(binary)
+        if _ninja_runs(binary):
+            return Path(binary)
+    import_error: ImportError | None = None
+    try:
+        import ninja
+    except ImportError as err:
+        import_error = err
+        wheel_binary = None
+    else:
+        wheel_binary = Path(ninja.BIN_DIR) / (
+            "ninja.exe" if os.name == "nt" else "ninja"
+        )
+    if wheel_binary is None or not wheel_binary.is_file():
+        raise EsphomeError(
+            "ninja not found on PATH or in the ninja package; reinstall the "
+            "esphome Python environment"
+        ) from import_error
+    return wheel_binary
+
+
+def escape(value: Path | str) -> str:
+    """Escape a path or token for a ninja file."""
+    return str(value).replace("$", "$$").replace(":", "$:").replace(" ", "$ ")
+
+
+def quote_arg(tok: str) -> str:
+    """Quote with the CreateProcess argv rule (as ``subprocess.list2cmdline``):
+    backslash runs double only before a quote. Windows-only; ``$`` must
+    already be doubled for ninja.
+    """
+    quoted = re.sub(r'(\\*)"', lambda m: m.group(1) * 2 + '\\"', tok)
+    quoted = re.sub(r"(\\+)\Z", lambda m: m.group(1) * 2, quoted)
+    return f'"{quoted}"'
+
+
+# Force-quote any token containing a character outside the shlex.quote-style
+# safe set: ninja hands POSIX commands to /bin/sh -c, so bare (, ;, <, *, `
+# and friends would be re-parsed as shell syntax.
+_NEEDS_QUOTE = re.compile(r"[^\w@%+=:,./-]")
+
+
+def shell_token(tok: str, force: bool = False) -> str:
+    """Re-quote a lexed token for the platform shell; ``force`` always quotes.
+
+    Single quotes on POSIX (/bin/sh), the argv rule on Windows
+    (CreateProcess). ``$`` is doubled first because ninja expands it before
+    the command reaches the shell.
+    """
+    tok = tok.replace("$", "$$")  # ninja would expand a bare $ to nothing
+    if not (force or not tok or _NEEDS_QUOTE.search(tok)):
+        return tok
+    # An empty token must become '' / "" or it vanishes from the argv
+    if os.name == "nt":
+        return quote_arg(tok)
+    # shlex.quote's rule; inlined because the $-doubled token must not be
+    # re-examined for safe characters
+    return "'" + tok.replace("'", "'\"'\"'") + "'"
+
+
+def quote_path(value: Path | str) -> str:
+    """Force-quote a path for the ninja command line (shell/CreateProcess)."""
+    return shell_token(str(value), force=True)

esphome/build_helpers/size_summary.py

@@ -0,0 +1,24 @@
+"""The PlatformIO-format size bar shared by the native toolchains."""
+
+from __future__ import annotations
+
+
+def format_bar(used: int, total: int) -> str:
+    """Match PlatformIO's ``_format_availale_bytes`` (sic, pioupload.py) exactly."""
+    pct_raw = used / total if total else 0
+    blocks = 10
+    filled = min(int(round(blocks * pct_raw)), blocks)
+    progress = "=" * filled
+    return (
+        f"[{progress:<{blocks}}] {pct_raw: 6.1%} "
+        f"(used {used:d} bytes from {total:d} bytes)"
+    )
+
+
+def print_size_line(label: str, used: int, total: int) -> None:
+    """One PlatformIO-format summary line (``RAM``/``Flash``).
+
+    The label padding is part of the format: ``script/ci_memory_impact_extract.py``
+    matches these lines verbatim.
+    """
+    print(f"{label + ':':<7}{format_bar(used, total)}")

esphome/build_helpers/tools_cache.py

@@ -0,0 +1,36 @@
+"""Machine-global tools cache location shared by the native backends."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+
+def tools_cache_path(env_var: str, subdir: str) -> Path:
+    """A backend's machine-global tools directory, with an env override.
+
+    A blank/whitespace override is treated as unset: ``Path("")`` resolves
+    to the CWD, which ``clean-all`` would then delete.
+    """
+    import platformdirs
+
+    from esphome.helpers import get_str_env
+
+    if prefix := get_str_env(env_var, "").strip():
+        # resolve(): symlinked prefixes otherwise trip idf.py's
+        # venv-mismatch warning on every build
+        return Path(prefix).expanduser().resolve()
+    # appauthor=False keeps the Windows path short (no vendor segment);
+    # deep IDF trees run into MAX_PATH otherwise
+    return (
+        Path(platformdirs.user_cache_dir("esphome", appauthor=False)) / subdir
+    ).resolve()
+
+
+# (env override, cache subdir) per native backend. writer.clean_all wipes
+# every entry via tools_cache_path, so listing a cache here is the single
+# step that registers it for removal; the backends' own path getters use
+# the same named pairs so the two cannot drift.
+IDF_TOOLS_CACHE = ("ESPHOME_ESP_IDF_PREFIX", "idf")
+SDK_NRF_TOOLS_CACHE = ("ESPHOME_SDK_NRF_PREFIX", "sdk-nrf")
+ARDUINO8266_TOOLS_CACHE = ("ESPHOME_ARDUINO8266_PREFIX", "arduino8266")
+TOOLS_CACHE_SPECS = (IDF_TOOLS_CACHE, SDK_NRF_TOOLS_CACHE, ARDUINO8266_TOOLS_CACHE)

esphome/compiled_config.py

@@ -100,6 +100,21 @@ def _refresh_sidecar() -> bool:
             )
             return False
         if old is not None and old.can_apply_to_core():
+            if (
+                old.toolchain is not None
+                and CORE.toolchain is not None
+                and old.toolchain != CORE.toolchain.value
+            ):
+                # Platforms normalize toolchain-sensitive keys differently;
+                # never cache a config validated under a different toolchain
+                # than the compile's
+                _LOGGER.debug(
+                    "Not caching: config validated with toolchain %r but the "
+                    "last compile used %r",
+                    CORE.toolchain.value,
+                    old.toolchain,
+                )
+                return False
             # Compile-written; nothing to refresh.
             return True
         if CORE.build_path is not None and CORE.build_path.exists():

esphome/components/adc/__init__.py

@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components.esp32 import (
@@ -16,6 +18,7 @@ from esphome.components.esp32 import (
 import esphome.config_validation as cv
 from esphome.const import CONF_ANALOG, CONF_INPUT, CONF_NUMBER, PLATFORM_ESP8266
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
 
@@ -225,7 +228,7 @@ ESP32_VARIANT_ADC2_PIN_TO_CHANNEL = {
 }
 
 
-def validate_adc_pin(value):
+def validate_adc_pin(value: Any) -> ConfigType | str:
     if str(value).upper() == "VCC":
         if CORE.is_rp2:
             return pins.internal_gpio_input_pin_schema(29)

esphome/components/adc/sensor.py

@@ -52,7 +52,7 @@ _attenuation = cv.enum(ATTENUATION_MODES, lower=True)
 _sampling_mode = cv.enum(SAMPLING_MODES, lower=True)
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if config[CONF_RAW] and config.get(CONF_ATTENUATION, None) == "auto":
         raise cv.Invalid("Automatic attenuation cannot be used when raw output is set")
 
@@ -120,7 +120,7 @@ CONFIG_SCHEMA = cv.All(
 CONF_ADC_CHANNEL_ID = "adc_channel_id"
 
 
-def _overlay_io_channels():
+def _overlay_io_channels() -> str:
     channel_count = CORE.data[CONF_ADC_CHANNEL_ID]
     entries = ", ".join(f"<&adc {channel_id}>" for channel_id in range(channel_count))
     return f"""
@@ -132,7 +132,7 @@ def _overlay_io_channels():
             """
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await sensor.register_sensor(var, config)

esphome/components/api/__init__.py

@@ -1,5 +1,6 @@
 import base64
 import logging
+from typing import Any
 
 from esphome import automation
 from esphome.automation import Condition
@@ -129,7 +130,7 @@ def _register_provisioning_source(config: ConfigType) -> ConfigType:
     return config
 
 
-def validate_encryption_key(value):
+def validate_encryption_key(value: Any) -> str:
     value = cv.string_strict(value)
     try:
         decoded = base64.b64decode(value, validate=True)
@@ -217,7 +218,7 @@ def _auto_detect_supports_response(config: ConfigType) -> ConfigType:
     return config
 
 
-def _validate_supports_response(value):
+def _validate_supports_response(value: Any) -> str:
     """Validate supports_response after auto-detection has set the value."""
     return cv.enum(SUPPORTS_RESPONSE_OPTIONS, lower=True)(value)
 
@@ -256,7 +257,7 @@ ENCRYPTION_SCHEMA = cv.Schema(
 )
 
 
-def _encryption_schema(config):
+def _encryption_schema(config: ConfigType | None) -> ConfigType:
     if config is None:
         config = {}
     return ENCRYPTION_SCHEMA(config)
@@ -393,7 +394,7 @@ async def to_code(config: ConfigType) -> None:
 
     if actions := config.get(CONF_ACTIONS, []):
         # Collect all triggers first, then register all at once with initializer_list
-        triggers: list[cg.Pvariable] = []
+        triggers: list[cg.MockObj] = []
         for conf in actions:
             func_args: list[tuple[MockObj, str]] = []
             service_template_args: list[MockObj] = []  # User service argument types
@@ -581,7 +582,7 @@ async def homeassistant_service_to_code(
     action_id: ID,
     template_arg: cg.TemplateArguments,
     args: TemplateArgsType,
-):
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, False)
@@ -647,7 +648,7 @@ async def homeassistant_service_to_code(
     return var
 
 
-def validate_homeassistant_event(value):
+def validate_homeassistant_event(value: Any) -> str:
     value = cv.string(value)
     if not value.startswith("esphome."):
         raise cv.Invalid(
@@ -676,7 +677,12 @@ HOMEASSISTANT_EVENT_ACTION_SCHEMA = cv.Schema(
     HOMEASSISTANT_EVENT_ACTION_SCHEMA,
     synchronous=True,
 )
-async def homeassistant_event_to_code(config, action_id, template_arg, args):
+async def homeassistant_event_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, True)
@@ -724,7 +730,12 @@ HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA = cv.maybe_simple_value(
     HOMEASSISTANT_TAG_SCANNED_ACTION_SCHEMA,
     synchronous=True,
 )
-async def homeassistant_tag_scanned_to_code(config, action_id, template_arg, args):
+async def homeassistant_tag_scanned_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     serv = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, serv, True)
@@ -740,7 +751,7 @@ CONF_SUCCESS = "success"
 CONF_ERROR_MESSAGE = "error_message"
 
 
-def _validate_api_respond_data(config):
+def _validate_api_respond_data(config: ConfigType) -> ConfigType:
     """Set flag during validation so AUTO_LOAD can include json component."""
     if CONF_DATA in config:
         CORE.data.setdefault(DOMAIN, {})[CONF_CAPTURE_RESPONSE] = True
@@ -824,7 +835,12 @@ API_CONNECTED_CONDITION_SCHEMA = cv.Schema(
 @automation.register_condition(
     "api.connected", APIConnectedCondition, API_CONNECTED_CONDITION_SCHEMA
 )
-async def api_connected_to_code(config, condition_id, template_arg, args):
+async def api_connected_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     var = cg.new_Pvariable(condition_id, template_arg)
     templ = await cg.templatable(config[CONF_STATE_SUBSCRIPTION_ONLY], args, cg.bool_)
     cg.add(var.set_state_subscription_only(templ))

esphome/components/api/api_server.cpp

@@ -423,12 +423,6 @@ void APIServer::send_infrared_rf_receive_event([[maybe_unused]] uint32_t device_
 API_DISPATCH_UPDATE(alarm_control_panel::AlarmControlPanel, alarm_control_panel)
 #endif
 
-float APIServer::get_setup_priority() const { return setup_priority::AFTER_WIFI; }
-
-void APIServer::set_port(uint16_t port) { this->port_ = port; }
-
-void APIServer::set_batch_delay(uint16_t batch_delay) { this->batch_delay_ = batch_delay; }
-
 #ifdef USE_API_HOMEASSISTANT_SERVICES
 void APIServer::send_homeassistant_action(const HomeassistantActionRequest &call) {
   bool has_subscriber = false;
@@ -553,10 +547,6 @@ const std::vector<APIServer::HomeAssistantStateSubscription> &APIServer::get_sta
 }
 #endif
 
-uint16_t APIServer::get_port() const { return this->port_; }
-
-void APIServer::set_reboot_timeout(uint32_t reboot_timeout) { this->reboot_timeout_ = reboot_timeout; }
-
 #ifdef USE_API_NOISE
 bool APIServer::update_noise_psk_(const SavedNoisePsk &new_psk, const LogString *save_log_msg,
                                   const LogString *fail_log_msg, bool make_active) {

esphome/components/api/api_server.h

@@ -51,8 +51,8 @@ class APIServer final : public Component,
  public:
   APIServer();
   void setup() override;
-  uint16_t get_port() const;
-  float get_setup_priority() const override;
+  uint16_t get_port() const { return this->port_; }
+  float get_setup_priority() const override { return setup_priority::AFTER_WIFI; }
   void loop() override;
   void dump_config() override;
   void on_shutdown() override;
@@ -63,9 +63,9 @@ class APIServer final : public Component,
 #ifdef USE_CAMERA
   void on_camera_image(const std::shared_ptr<camera::CameraImage> &image) override;
 #endif
-  void set_port(uint16_t port);
-  void set_reboot_timeout(uint32_t reboot_timeout);
-  void set_batch_delay(uint16_t batch_delay);
+  void set_port(uint16_t port) { this->port_ = port; }
+  void set_reboot_timeout(uint32_t reboot_timeout) { this->reboot_timeout_ = reboot_timeout; }
+  void set_batch_delay(uint16_t batch_delay) { this->batch_delay_ = batch_delay; }
   uint16_t get_batch_delay() const { return batch_delay_; }
   void set_listen_backlog(uint8_t listen_backlog) { this->listen_backlog_ = listen_backlog; }
 

esphome/components/bk72xx_ble/__init__.py

@@ -4,9 +4,12 @@ The platform analog of esp32_ble / rp2040_ble: owns the Beken BDK BLE stack
 bring-up and the controller BLE address. Consumers (bk72xx_ble_tracker) build
 on this component and contain no SDK calls of their own.
 
-Supported SoCs (BLE 5.x): BK7231N/BK7236 (BLE 5.1), BK7238/BK7252N/BK7253
-(BLE 5.2), and any future BLE-5.x SoC. Known non-5.x families are rejected in
-to_code; unknown families are capability-checked at compile time via
+Supported SoCs (BLE 5.x): BK7231N/BK7236 (BLE 5.1), BK7252N/BK7253 (BLE 5.2),
+and any future BLE-5.x SoC. BK7238 (BLE 5.2) is blocked for now: with BLE
+compiled in, the Beken SDK erases the bootloader flash sector at boot because
+LibreTiny's partition table has no BLE bonding entry (esphome#18646,
+libretiny-eu/libretiny#408). Known non-5.x families and BK7238 are rejected in
+to_code. Unknown families are capability-checked at compile time via
 `__has_include("app_ble.h")`, a header only on the BLE 5.x include path
 (ble_api.h ships for every SoC, so it cannot be the probe). A non-5.x build
 fails with a clear #error.
@@ -65,6 +68,14 @@ def _unsupported_family_message(family: str) -> str | None:
         )
     if family == FAMILY_BK7231Q:
         return "bk72xx_ble does not support BK7231Q: this SoC has no BLE"
+    if family == FAMILY_BK7238:
+        return (
+            "bk72xx_ble is disabled on BK7238: with BLE compiled in, the Beken SDK "
+            "erases the bootloader flash sector at boot and the device can no longer "
+            "start (see https://github.com/esphome/esphome/issues/18646); support "
+            "returns once the LibreTiny partition table fix "
+            "(libretiny-eu/libretiny#408) is released"
+        )
     return None
 
 
@@ -113,18 +124,7 @@ async def to_code(config: ConfigType) -> None:
     # BK7231N, but NOT on BK7238 (its BLE stack has no such symbol; the address is
     # derived from the WiFi MAC instead — the BDK's own fallback). Tell the C++
     # which path is available so it doesn't reference a missing symbol.
-    family = libretiny.get_libretiny_family()
-    if family == FAMILY_BK7231N:
+    if libretiny.get_libretiny_family() == FAMILY_BK7231N:
         cg.add_define("BK72XX_BLE_HAS_COMMON_BDADDR")
-    elif family == FAMILY_BK7238:
-        # ESPHome's LibreTiny disables BLE on BK7238 because the SDK can hang at
-        # WiFi STA startup when BLE init runs. This component re-enables BLE, so
-        # warn loudly: BK7238 is accepted but not hardware-verified and may be
-        # WiFi-unstable with BLE on.
-        _LOGGER.warning(
-            "bk72xx_ble on BK7238: enabling BLE is known to risk a WiFi STA startup "
-            "hang on this family and is not yet hardware-verified. Expect possible "
-            "instability."
-        )
 
     cg.add_define("USE_BK72XX_BLE")

esphome/components/button/__init__.py

@@ -16,14 +16,15 @@ from esphome.const import (
     DEVICE_CLASS_RESTART,
     DEVICE_CLASS_UPDATE,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_device_class,
     setup_entity,
 )
-from esphome.cpp_generator import MockObjClass
+from esphome.cpp_generator import MockObj, MockObjClass, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -88,7 +89,7 @@ _CALLBACK_AUTOMATIONS = (
 
 
 @setup_entity("button")
-async def setup_button_core_(var, config):
+async def setup_button_core_(var: MockObj, config: ConfigType) -> None:
     await automation.build_callback_automations(var, config, _CALLBACK_AUTOMATIONS)
 
     setup_device_class(config)
@@ -101,7 +102,7 @@ async def setup_button_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_button(var, config):
+async def register_button(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("button", config)
@@ -109,7 +110,7 @@ async def register_button(var, config):
     await setup_button_core_(var, config)
 
 
-async def new_button(config, *args):
+async def new_button(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_button(var, config)
     return var
@@ -125,11 +126,16 @@ BUTTON_PRESS_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "button.press", PressAction, BUTTON_PRESS_SCHEMA, synchronous=True
 )
-async def button_press_to_code(config, action_id, template_arg, args):
+async def button_press_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(button_ns.using)

esphome/components/captive_portal/captive_portal.cpp

@@ -6,6 +6,7 @@
 #include "esphome/core/string_ref.h"
 #include "esphome/components/wifi/wifi_component.h"
 #include "captive_index.h"
+#include "scan_list.h"
 
 namespace esphome::captive_portal {
 
@@ -33,8 +34,10 @@ void CaptivePortal::handle_config(AsyncWebServerRequest *request) {
     // Invariant: only bounded in-memory work under the lock; the network send
     // happens later in request->send()
     wifi::ScanResultsLock lock(wifi::global_wifi_component);
-    for (const auto &scan : wifi::global_wifi_component->get_scan_result()) {
-      if (scan.get_is_hidden())
+    const auto &results = wifi::global_wifi_component->get_scan_result();
+    for (const auto &scan : results) {
+      bool with_auth = false;
+      if (!should_show_scan_entry(results, scan, with_auth))
         continue;
 
       json_escape_into_buffer(escaped_ssid, scan.get_ssid());
@@ -44,10 +47,10 @@ void CaptivePortal::handle_config(AsyncWebServerRequest *request) {
       stream->print(ESPHOME_F("\",\"rssi\":"));
       stream->print(scan.get_rssi());
       stream->print(ESPHOME_F(",\"lock\":"));
-      stream->print(scan.get_with_auth());
+      stream->print(with_auth);
       stream->print(ESPHOME_F("}"));
 #else
-      stream->printf(R"(,{"ssid":"%s","rssi":%d,"lock":%d})", escaped_ssid, scan.get_rssi(), scan.get_with_auth());
+      stream->printf(R"(,{"ssid":"%s","rssi":%d,"lock":%d})", escaped_ssid, scan.get_rssi(), with_auth);
 #endif
     }
   }

esphome/components/captive_portal/scan_list.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <cstdint>
+
+namespace esphome::captive_portal {
+
+// A scan lists every BSSID, so one SSID can appear several times. Returns true for
+// the strongest entry per SSID (earliest on ties), never for hidden entries. scan
+// must be an element of results. with_auth is written only when returning true and
+// is set if any entry with that SSID needs a key. Templated for host tests.
+template<typename Results, typename Entry>
+bool should_show_scan_entry(const Results &results, const Entry &scan, bool &with_auth) {
+  if (scan.get_is_hidden())
+    return false;
+  const int8_t rssi = scan.get_rssi();
+  bool any_auth = false;
+  for (const auto &other : results) {
+    if (other.get_is_hidden() || !other.ssid_equals(scan))
+      continue;
+    // Same array, so address order is index order. scan fails both checks against itself.
+    if (other.get_rssi() > rssi || (other.get_rssi() == rssi && &other < &scan))
+      return false;
+    any_auth |= other.get_with_auth();
+  }
+  with_auth = any_auth;
+  return true;
+}
+
+}  // namespace esphome::captive_portal

esphome/components/climate/__init__.py

@@ -1,3 +1,5 @@
+from typing import Any
+
 from esphome import automation
 import esphome.codegen as cg
 from esphome.components import mqtt, web_server
@@ -48,13 +50,19 @@ from esphome.const import (
     CONF_VISUAL,
     CONF_WEB_SERVER,
 )
-from esphome.core import CORE, CoroPriority, Lambda, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, Lambda, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_entity,
 )
-from esphome.cpp_generator import LambdaExpression, MockObjClass
+from esphome.cpp_generator import (
+    LambdaExpression,
+    MockObj,
+    MockObjClass,
+    TemplateArgsType,
+)
+from esphome.types import ConfigType, SafeExpType
 
 IS_PLATFORM_COMPONENT = True
 
@@ -132,7 +140,7 @@ VISUAL_TEMPERATURE_STEP_SCHEMA = cv.Schema(
 )
 
 
-def visual_temperature_step(value):
+def visual_temperature_step(value: Any) -> ConfigType:
     # Allow defining target/current temperature steps separately
     if isinstance(value, dict):
         return VISUAL_TEMPERATURE_STEP_SCHEMA(value)
@@ -273,7 +281,7 @@ def climate_schema(
 
 
 @setup_entity("climate")
-async def setup_climate_core_(var, config):
+async def setup_climate_core_(var: MockObj, config: ConfigType) -> None:
     visual = config.get(CONF_VISUAL, {})
     if (min_temp := visual.get(CONF_MIN_TEMPERATURE)) is not None:
         cg.add_define("USE_CLIMATE_VISUAL_OVERRIDES")
@@ -443,7 +451,7 @@ async def setup_climate_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_climate(var, config):
+async def register_climate(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("climate", config)
@@ -451,7 +459,7 @@ async def register_climate(var, config):
     await setup_climate_core_(var, config)
 
 
-async def new_climate(config, *args):
+async def new_climate(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_climate(var, config)
     return var
@@ -485,7 +493,12 @@ CLIMATE_CONTROL_ACTION_SCHEMA = cv.Schema(
     CLIMATE_CONTROL_ACTION_SCHEMA,
     synchronous=True,
 )
-async def climate_control_to_code(config, action_id, template_arg, args):
+async def climate_control_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
 
     # All configured fields are folded into a single stateless lambda whose
@@ -549,5 +562,5 @@ async def climate_control_to_code(config, action_id, template_arg, args):
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(climate_ns.using)

esphome/components/climate/climate.cpp

@@ -511,29 +511,6 @@ ClimateTraits Climate::get_traits() {
   return traits;
 }
 
-#ifdef USE_CLIMATE_VISUAL_OVERRIDES
-void Climate::set_visual_min_temperature_override(float visual_min_temperature_override) {
-  this->visual_min_temperature_override_ = visual_min_temperature_override;
-}
-
-void Climate::set_visual_max_temperature_override(float visual_max_temperature_override) {
-  this->visual_max_temperature_override_ = visual_max_temperature_override;
-}
-
-void Climate::set_visual_temperature_step_override(float target, float current) {
-  this->visual_target_temperature_step_override_ = target;
-  this->visual_current_temperature_step_override_ = current;
-}
-
-void Climate::set_visual_min_humidity_override(float visual_min_humidity_override) {
-  this->visual_min_humidity_override_ = visual_min_humidity_override;
-}
-
-void Climate::set_visual_max_humidity_override(float visual_max_humidity_override) {
-  this->visual_max_humidity_override_ = visual_max_humidity_override;
-}
-#endif
-
 ClimateCall Climate::make_call() { return ClimateCall(this); }
 
 ClimateCall ClimateDeviceRestoreState::to_call(Climate *climate) {

esphome/components/climate/climate.h

@@ -228,11 +228,22 @@ class Climate : public EntityBase {
   ClimateTraits get_traits();
 
 #ifdef USE_CLIMATE_VISUAL_OVERRIDES
-  void set_visual_min_temperature_override(float visual_min_temperature_override);
-  void set_visual_max_temperature_override(float visual_max_temperature_override);
-  void set_visual_temperature_step_override(float target, float current);
-  void set_visual_min_humidity_override(float visual_min_humidity_override);
-  void set_visual_max_humidity_override(float visual_max_humidity_override);
+  void set_visual_min_temperature_override(float visual_min_temperature_override) {
+    this->visual_min_temperature_override_ = visual_min_temperature_override;
+  }
+  void set_visual_max_temperature_override(float visual_max_temperature_override) {
+    this->visual_max_temperature_override_ = visual_max_temperature_override;
+  }
+  void set_visual_temperature_step_override(float target, float current) {
+    this->visual_target_temperature_step_override_ = target;
+    this->visual_current_temperature_step_override_ = current;
+  }
+  void set_visual_min_humidity_override(float visual_min_humidity_override) {
+    this->visual_min_humidity_override_ = visual_min_humidity_override;
+  }
+  void set_visual_max_humidity_override(float visual_max_humidity_override) {
+    this->visual_max_humidity_override_ = visual_max_humidity_override;
+  }
 #endif
 
   /// Set the supported custom fan modes (stored on Climate, referenced by ClimateTraits).

esphome/components/cover/__init__.py

@@ -46,7 +46,7 @@ from esphome.core.entity_helpers import (
     setup_entity,
 )
 from esphome.cpp_generator import LambdaExpression, MockObj, MockObjClass
-from esphome.types import ConfigType, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType, TemplateArgsType
 
 IS_PLATFORM_COMPONENT = True
 
@@ -162,7 +162,7 @@ _COVER_SCHEMA = (
 _COVER_SCHEMA.add_extra(entity_duplicate_validator("cover"))
 
 
-def _validate_mqtt_state_topics(config):
+def _validate_mqtt_state_topics(config: ConfigType) -> ConfigType:
     if config.get(CONF_MQTT_JSON_STATE_PAYLOAD):
         if CONF_POSITION_STATE_TOPIC in config:
             raise cv.Invalid(
@@ -201,7 +201,7 @@ def cover_schema(
 
 
 @setup_entity("cover")
-async def setup_cover_core_(var, config):
+async def setup_cover_core_(var: MockObj, config: ConfigType) -> None:
     setup_device_class(config)
 
     if CONF_ON_OPEN in config:
@@ -235,7 +235,7 @@ async def setup_cover_core_(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_cover(var, config):
+async def register_cover(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("cover", config)
@@ -243,7 +243,7 @@ async def register_cover(var, config):
     await setup_cover_core_(var, config)
 
 
-async def new_cover(config, *args):
+async def new_cover(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_cover(var, config)
     return var
@@ -259,7 +259,12 @@ COVER_ACTION_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "cover.open", OpenAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_open_to_code(config, action_id, template_arg, args):
+async def cover_open_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -267,7 +272,12 @@ async def cover_open_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.close", CloseAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_close_to_code(config, action_id, template_arg, args):
+async def cover_close_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -275,7 +285,12 @@ async def cover_close_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.stop", StopAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_stop_to_code(config, action_id, template_arg, args):
+async def cover_stop_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -283,7 +298,12 @@ async def cover_stop_to_code(config, action_id, template_arg, args):
 @automation.register_action(
     "cover.toggle", ToggleAction, COVER_ACTION_SCHEMA, synchronous=True
 )
-async def cover_toggle_to_code(config, action_id, template_arg, args):
+async def cover_toggle_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
@@ -421,5 +441,5 @@ automation.register_condition(
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(cover_ns.using)

esphome/components/cover/cover.cpp

@@ -135,10 +135,6 @@ CoverCall &CoverCall::set_stop(bool stop) {
   this->stop_ = stop;
   return *this;
 }
-bool CoverCall::get_stop() const { return this->stop_; }
-
-CoverCall Cover::make_call() { return {this}; }
-
 void Cover::publish_state(bool save) {
   this->position = clamp(this->position, 0.0f, 1.0f);
   this->tilt = clamp(this->tilt, 0.0f, 1.0f);
@@ -184,9 +180,6 @@ optional<CoverRestoreState> Cover::restore_state_() {
   return recovered;
 }
 
-bool Cover::is_fully_open() const { return this->position == COVER_OPEN; }
-bool Cover::is_fully_closed() const { return this->position == COVER_CLOSED; }
-
 CoverCall CoverRestoreState::to_call(Cover *cover) {
   auto call = cover->make_call();
   auto traits = cover->get_traits();

esphome/components/cover/cover.h

@@ -50,7 +50,7 @@ class CoverCall {
   void perform();
 
   const optional<float> &get_position() const;
-  bool get_stop() const;
+  bool get_stop() const { return this->stop_; }
   const optional<float> &get_tilt() const;
   const optional<bool> &get_toggle() const;
 
@@ -123,7 +123,7 @@ class Cover : public EntityBase {
   float tilt{COVER_OPEN};
 
   /// Construct a new cover call used to control the cover.
-  CoverCall make_call();
+  CoverCall make_call() { return {this}; }
 
   template<typename F> void add_on_state_callback(F &&f) { this->state_callback_.add(std::forward<F>(f)); }
 
@@ -139,9 +139,9 @@ class Cover : public EntityBase {
   virtual CoverTraits get_traits() = 0;
 
   /// Helper method to check if the cover is fully open. Equivalent to comparing .position against 1.0
-  bool is_fully_open() const;
+  bool is_fully_open() const { return this->position == COVER_OPEN; }
   /// Helper method to check if the cover is fully closed. Equivalent to comparing .position against 0.0
-  bool is_fully_closed() const;
+  bool is_fully_closed() const { return this->position == COVER_CLOSED; }
 
  protected:
   friend CoverCall;

esphome/components/dashboard_import/__init__.py

@@ -2,6 +2,7 @@ import base64
 from pathlib import Path
 import re
 import secrets
+from typing import Any
 
 import requests
 from ruamel.yaml import YAML
@@ -13,6 +14,7 @@ import esphome.config_validation as cv
 from esphome.const import CONF_ESPHOME, CONF_PROJECT, CONF_REF, CONF_WIFI
 import esphome.final_validate as fv
 from esphome.happy_eyeballs import ensure_happy_eyeballs
+from esphome.types import ConfigType
 from esphome.yaml_util import dump
 
 dashboard_import_ns = cg.esphome_ns.namespace("dashboard_import")
@@ -23,14 +25,14 @@ DEPENDENCIES = ["api"]
 CODEOWNERS = ["@esphome/core"]
 
 
-def validate_import_url(value):
+def validate_import_url(value: Any) -> str:
     value = cv.string_strict(value)
     value = cv.Length(max=255)(value)
     validate_source_shorthand(value)
     return value
 
 
-def validate_full_url(config):
+def validate_full_url(config: ConfigType) -> ConfigType:
     if not config[CONF_IMPORT_FULL_CONFIG]:
         return config
     source = validate_source_shorthand(config[CONF_PACKAGE_IMPORT_URL])
@@ -55,7 +57,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     full_config = fv.full_config.get()[CONF_ESPHOME]
     if CONF_PROJECT not in full_config:
         raise cv.Invalid(
@@ -73,7 +75,7 @@ wifi:
 """
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_DASHBOARD_IMPORT")
     url = config[CONF_PACKAGE_IMPORT_URL]
     if config[CONF_IMPORT_FULL_CONFIG]:

esphome/components/datetime/date_entity.cpp

@@ -37,8 +37,6 @@ void DateEntity::publish_state() {
 #endif
 }
 
-DateCall DateEntity::make_call() { return DateCall(this); }
-
 void DateCall::validate_() {
   if (this->year_.has_value() && (this->year_ < 1970 || this->year_ > 3000)) {
     ESP_LOGE(TAG, "Year must be between 1970 and 3000");

esphome/components/datetime/date_entity.h

@@ -96,6 +96,8 @@ class DateCall {
   optional<uint8_t> day_;
 };
 
+inline DateCall DateEntity::make_call() { return DateCall(this); }
+
 template<typename... Ts> class DateSetAction final : public Action<Ts...>, public Parented<DateEntity> {
  public:
   TEMPLATABLE_VALUE(ESPTime, date)

esphome/components/datetime/datetime_entity.cpp

@@ -53,8 +53,6 @@ void DateTimeEntity::publish_state() {
 #endif
 }
 
-DateTimeCall DateTimeEntity::make_call() { return DateTimeCall(this); }
-
 ESPTime DateTimeEntity::state_as_esptime() const {
   ESPTime obj;
   obj.year = this->year_;

esphome/components/datetime/datetime_entity.h

@@ -121,6 +121,8 @@ class DateTimeCall {
   optional<uint8_t> second_;
 };
 
+inline DateTimeCall DateTimeEntity::make_call() { return DateTimeCall(this); }
+
 template<typename... Ts> class DateTimeSetAction final : public Action<Ts...>, public Parented<DateTimeEntity> {
  public:
   TEMPLATABLE_VALUE(ESPTime, datetime)

esphome/components/datetime/time_entity.cpp

@@ -33,8 +33,6 @@ void TimeEntity::publish_state() {
 #endif
 }
 
-TimeCall TimeEntity::make_call() { return TimeCall(this); }
-
 void TimeCall::validate_() {
   if (this->hour_.has_value() && this->hour_ > 23) {
     ESP_LOGE(TAG, "Hour must be between 0 and 23");

esphome/components/datetime/time_entity.h

@@ -98,6 +98,8 @@ class TimeCall {
   optional<uint8_t> second_;
 };
 
+inline TimeCall TimeEntity::make_call() { return TimeCall(this); }
+
 template<typename... Ts> class TimeSetAction final : public Action<Ts...>, public Parented<TimeEntity> {
  public:
   TEMPLATABLE_VALUE(ESPTime, time)

esphome/components/debug/__init__.py

@@ -12,6 +12,7 @@ from esphome.const import (
     PlatformFramework,
 )
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
 DEPENDENCIES = ["logger"]
@@ -45,7 +46,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     if CORE.using_zephyr:
         zephyr_add_prj_conf("HWINFO", True)
         # gdb thread support

esphome/components/debug/sensor.py

@@ -21,6 +21,7 @@ from esphome.const import (
     UNIT_MILLISECOND,
     UNIT_PERCENT,
 )
+from esphome.types import ConfigType
 
 from . import (  # noqa: F401  pylint: disable=unused-import
     CONF_DEBUG_ID,
@@ -111,7 +112,7 @@ CONFIG_SCHEMA = {
 }
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     debug_component = await cg.get_variable(config[CONF_DEBUG_ID])
 
     if free_conf := config.get(CONF_FREE):

esphome/components/debug/text_sensor.py

@@ -7,6 +7,7 @@ from esphome.const import (
     ICON_CHIP,
     ICON_RESTART,
 )
+from esphome.types import ConfigType
 
 from . import (  # noqa: F401  pylint: disable=unused-import
     CONF_DEBUG_ID,
@@ -33,7 +34,7 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     debug_component = await cg.get_variable(config[CONF_DEBUG_ID])
 
     if CONF_DEVICE in config:

esphome/components/deep_sleep/__init__.py

@@ -163,6 +163,11 @@ def validate_config(config: ConfigType) -> ConfigType:
                     "You need to remove the global wakeup_pin_mode and define it per pin"
                 )
             if wakeup_pins:
+                if CONF_WAKEUP_PIN_MODE in wakeup_pins[0]:
+                    raise cv.Invalid(
+                        "Specify wakeup_pin_mode either at the top level under deep_sleep "
+                        "or under the pin entry, not both"
+                    )
                 wakeup_pins[0][CONF_WAKEUP_PIN_MODE] = config.pop(CONF_WAKEUP_PIN_MODE)
     elif (
         isinstance(config.get(CONF_WAKEUP_PIN), list)

esphome/components/deep_sleep/deep_sleep_component.cpp

@@ -43,10 +43,6 @@ void DeepSleepComponent::loop() {
     this->begin_sleep();
 }
 
-void DeepSleepComponent::set_sleep_duration(uint32_t time_ms) { this->sleep_duration_ = uint64_t(time_ms) * 1000; }
-
-void DeepSleepComponent::set_run_duration(uint32_t time_ms) { this->run_duration_ = time_ms; }
-
 void DeepSleepComponent::begin_sleep(bool manual) {
   if (this->prevent_ && !manual) {
     this->next_enter_deep_sleep_ = true;
@@ -76,8 +72,4 @@ void DeepSleepComponent::begin_sleep(bool manual) {
 
 float DeepSleepComponent::get_setup_priority() const { return setup_priority::LATE; }
 
-void DeepSleepComponent::prevent_deep_sleep() { this->prevent_ = true; }
-
-void DeepSleepComponent::allow_deep_sleep() { this->prevent_ = false; }
-
 }  // namespace esphome::deep_sleep

esphome/components/deep_sleep/deep_sleep_component.h

@@ -132,7 +132,7 @@ template<typename... Ts> class PreventDeepSleepAction;
 class DeepSleepComponent final : public Component {
  public:
   /// Set the duration in ms the component should sleep once it's in deep sleep mode.
-  void set_sleep_duration(uint32_t time_ms);
+  void set_sleep_duration(uint32_t time_ms) { this->sleep_duration_ = uint64_t(time_ms) * 1000; }
 #if defined(USE_ESP32)
   /** Set the pin to wake up to on the ESP32 once it's in deep sleep mode.
    * Use the inverted property to set the wakeup level.
@@ -157,7 +157,7 @@ class DeepSleepComponent final : public Component {
 #if !defined(USE_ESP32_VARIANT_ESP32C2) && !defined(USE_ESP32_VARIANT_ESP32C3) && \
     !defined(USE_ESP32_VARIANT_ESP32C5) && !defined(USE_ESP32_VARIANT_ESP32C6) && \
     !defined(USE_ESP32_VARIANT_ESP32C61) && !defined(USE_ESP32_VARIANT_ESP32H2)
-  void set_touch_wakeup(bool touch_wakeup);
+  void set_touch_wakeup(bool touch_wakeup) { this->touch_wakeup_ = touch_wakeup; }
 #endif
 
   // Set the duration in ms for how long the code should run before entering
@@ -166,7 +166,7 @@ class DeepSleepComponent final : public Component {
 #endif  // USE_ESP32
 
   /// Set a duration in ms for how long the code should run before entering deep sleep mode.
-  void set_run_duration(uint32_t time_ms);
+  void set_run_duration(uint32_t time_ms) { this->run_duration_ = time_ms; }
 
   void setup() override;
   void dump_config() override;
@@ -176,8 +176,8 @@ class DeepSleepComponent final : public Component {
   /// Helper to enter deep sleep mode
   void begin_sleep(bool manual = false);
 
-  void prevent_deep_sleep();
-  void allow_deep_sleep();
+  void prevent_deep_sleep() { this->prevent_ = true; }
+  void allow_deep_sleep() { this->prevent_ = false; }
 
  protected:
   // Returns nullopt if no run duration is set. Otherwise, returns the run

esphome/components/deep_sleep/deep_sleep_esp32.cpp

@@ -74,12 +74,6 @@ void DeepSleepComponent::set_wakeup_pin_mode(WakeupPinMode wakeup_pin_mode) {
 void DeepSleepComponent::set_ext1_wakeup(Ext1Wakeup ext1_wakeup) { this->ext1_wakeup_ = ext1_wakeup; }
 #endif
 
-#if !defined(USE_ESP32_VARIANT_ESP32C2) && !defined(USE_ESP32_VARIANT_ESP32C3) && \
-    !defined(USE_ESP32_VARIANT_ESP32C5) && !defined(USE_ESP32_VARIANT_ESP32C6) && \
-    !defined(USE_ESP32_VARIANT_ESP32C61) && !defined(USE_ESP32_VARIANT_ESP32H2)
-void DeepSleepComponent::set_touch_wakeup(bool touch_wakeup) { this->touch_wakeup_ = touch_wakeup; }
-#endif
-
 void DeepSleepComponent::set_run_duration(WakeupCauseToRunDuration wakeup_cause_to_run_duration) {
   wakeup_cause_to_run_duration_ = wakeup_cause_to_run_duration;
 }

esphome/components/display/display.cpp

@@ -685,9 +685,6 @@ void Display::show_page(DisplayPage *page) {
   }
 }
 
-void Display::show_next_page() { this->page_->show_next(); }
-void Display::show_prev_page() { this->page_->show_prev(); }
-
 void Display::do_update_() {
   if (this->auto_clear_enabled_) {
     this->clear();
@@ -892,9 +889,6 @@ void DisplayPage::show_prev() {
   this->prev_->show();
 }
 
-void DisplayPage::set_parent(Display *parent) { this->parent_ = parent; }
-void DisplayPage::set_prev(DisplayPage *prev) { this->prev_ = prev; }
-void DisplayPage::set_next(DisplayPage *next) { this->next_ = next; }
 const display_writer_t &DisplayPage::get_writer() const { return this->writer_; }
 
 const LogString *text_align_to_string(TextAlign textalign) {

esphome/components/display/display.h

@@ -802,9 +802,9 @@ class DisplayPage final {
   void show();
   void show_next();
   void show_prev();
-  void set_parent(Display *parent);
-  void set_prev(DisplayPage *prev);
-  void set_next(DisplayPage *next);
+  void set_parent(Display *parent) { this->parent_ = parent; }
+  void set_prev(DisplayPage *prev) { this->prev_ = prev; }
+  void set_next(DisplayPage *next) { this->next_ = next; }
   const display_writer_t &get_writer() const;
 
  protected:
@@ -814,6 +814,9 @@ class DisplayPage final {
   DisplayPage *next_{nullptr};
 };
 
+inline void Display::show_next_page() { this->page_->show_next(); }
+inline void Display::show_prev_page() { this->page_->show_prev(); }
+
 template<typename... Ts> class DisplayPageShowAction final : public Action<Ts...> {
  public:
   TEMPLATABLE_VALUE(DisplayPage *, page)

esphome/components/esp32/__init__.py

@@ -233,6 +233,7 @@ DEFAULT_EXCLUDED_IDF_COMPONENTS = (
     "esp_driver_touch_sens",  # Touch sensor driver - only needed by esp32_touch
     "esp_driver_twai",  # TWAI/CAN driver - only needed by esp32_can component
     "esp_eth",  # Ethernet driver - only needed by ethernet component
+    "esp_gdbstub",  # GDB stub panic handler - unused by ESPHome; bt pulls it back
     "esp_hid",  # HID host/device support - ESPHome doesn't implement HID functionality
     "esp_http_client",  # HTTP client - only needed by http_request component
     "esp_https_ota",  # ESP-IDF HTTPS OTA - ESPHome has its own OTA implementation
@@ -1071,19 +1072,11 @@ def _check_esp_idf_versions(config: ConfigType) -> ConfigType:
     return config
 
 
-def _validate_toolchain(value) -> Toolchain:
-    return Toolchain(
-        cv.one_of(Toolchain.PLATFORMIO, Toolchain.ESP_IDF, lower=True)(value)
-    )
-
-
-def _resolve_toolchain(value: ConfigType) -> ConfigType:
-    # Resolve toolchain: CLI (already on CORE.toolchain) > YAML > default.
-    # Runs before _detect_variant so downstream validators can rely on
-    # CORE.toolchain instead of re-resolving it from the config dict.
-    if CORE.toolchain is None:
-        CORE.toolchain = value.get(CONF_TOOLCHAIN, Toolchain.ESP_IDF)
-    return value
+_TOOLCHAINS = (Toolchain.PLATFORMIO, Toolchain.ESP_IDF)
+_validate_toolchain = cv.toolchain_enum(_TOOLCHAINS)
+# Runs before _detect_variant so downstream validators can rely on
+# CORE.toolchain instead of re-resolving it from the config dict.
+_resolve_toolchain = cv.resolve_toolchain("ESP32", _TOOLCHAINS, Toolchain.ESP_IDF)
 
 
 def _check_versions(config: ConfigType) -> ConfigType:

esphome/components/esp32_ble/ble.cpp

@@ -643,8 +643,28 @@ void ESP32BLE::gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_pa
       App.wake_loop_threadsafe();
       return;
 
+    // Log the result of connection parameter updates: a peer can reject or
+    // never answer an update, and without this the link silently stays on the
+    // old parameters (visible only as unexplained supervision timeouts).
+    case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT: {
+      if (param->update_conn_params.status != ESP_BT_STATUS_SUCCESS) {
+        char mac_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+        format_mac_addr_upper(param->update_conn_params.bda, mac_s);
+        ESP_LOGW(TAG, "[%s] Conn param update failed, status=%d", mac_s, param->update_conn_params.status);
+      }
+#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
+      else {
+        char mac_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
+        format_mac_addr_upper(param->update_conn_params.bda, mac_s);
+        ESP_LOGV(TAG, "[%s] Conn params updated: interval=%u (x1.25ms) latency=%u timeout=%u (x10ms)", mac_s,
+                 param->update_conn_params.conn_int, param->update_conn_params.latency,
+                 param->update_conn_params.timeout);
+      }
+#endif
+      return;
+    }
+
     // Ignore these GAP events as they are not relevant for our use case
-    case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT:
     case ESP_GAP_BLE_SET_PKT_LENGTH_COMPLETE_EVT:
     case ESP_GAP_BLE_PHY_UPDATE_COMPLETE_EVT:       // BLE 5.0 PHY update complete
     case ESP_GAP_BLE_CHANNEL_SELECT_ALGORITHM_EVT:  // BLE 5.0 channel selection algorithm

esphome/components/esp8266/__init__.py

@@ -3,6 +3,7 @@ from pathlib import Path
 import platform
 import re
 import subprocess
+from typing import Any
 
 import esphome.codegen as cg
 import esphome.config_validation as cv
@@ -31,6 +32,7 @@ from esphome.core import (
 from esphome.core.config import BOARD_MAX_LENGTH
 from esphome.helpers import IS_MACOS, copy_file_if_changed
 from esphome.platformio.toolchain import copy_ccache_script
+from esphome.storage_json import StorageJSON
 from esphome.types import ConfigType
 
 from .boards import BOARDS, ESP8266_LD_SCRIPTS
@@ -88,7 +90,7 @@ def lambdas_use_scanf_float(config: ConfigType) -> bool:
     return False
 
 
-def set_core_data(config):
+def set_core_data(config: ConfigType) -> ConfigType:
     CORE.data[KEY_ESP8266] = {}
     CORE.data[KEY_CORE][KEY_TARGET_PLATFORM] = PLATFORM_ESP8266
     CORE.data[KEY_CORE][KEY_TARGET_FRAMEWORK] = "arduino"
@@ -102,7 +104,7 @@ def set_core_data(config):
     return config
 
 
-def get_download_types(storage_json):
+def get_download_types(storage_json: StorageJSON) -> list[dict[str, str]]:
     """Binary-download entries for a built ESP8266 firmware.
 
     Used by device-builder (esphome/device-builder), via
@@ -134,7 +136,16 @@ def _format_framework_arduino_version(ver: cv.Version) -> str:
         return f"~1.{ver.major}{ver.minor:02d}{ver.patch:02d}.0"
     if ver <= cv.Version(2, 6, 2):
         return f"~2.{ver.major}{ver.minor:02d}{ver.patch:02d}.0"
-    return f"~3.{ver.major}{ver.minor:02d}{ver.patch:02d}.0"
+    # Same encoding the native toolchain uses for its package download, so a
+    # version bump cannot drift between the two paths.
+    from esphome.arduino8266.framework import framework_package_version
+
+    try:
+        return f"~{framework_package_version(ver)}"
+    except EsphomeError as err:
+        # Anchor the 4.x rejection to the framework version line instead of
+        # aborting with a bare traceback-level error
+        raise cv.Invalid(str(err), path=[CONF_VERSION]) from err
 
 
 # NOTE: Keep this in mind when updating the recommended version:
@@ -157,7 +168,7 @@ ARDUINO_3_PLATFORM_VERSION = cv.Version(3, 2, 0)
 ARDUINO_4_PLATFORM_VERSION = cv.Version(4, 2, 1)
 
 
-def _arduino_check_versions(value):
+def _arduino_check_versions(value: ConfigType) -> ConfigType:
     value = value.copy()
     lookups = {
         "dev": (cv.Version(3, 1, 2), "https://github.com/esp8266/Arduino.git"),
@@ -200,7 +211,7 @@ def _arduino_check_versions(value):
     return value
 
 
-def _parse_platform_version(value):
+def _parse_platform_version(value: Any) -> str:
     try:
         # if platform version is a valid version constraint, prefix the default package
         cv.platformio_version_constraint(value)
@@ -244,6 +255,9 @@ CONFIG_SCHEMA = cv.All(
             cv.Optional(CONF_ENABLE_SCANF_FLOAT): cv.boolean,
         }
     ),
+    # Until the native toolchain lands, PlatformIO is the only backend;
+    # reject a --toolchain this platform cannot serve yet.
+    cv.require_platformio_toolchain("ESP8266"),
     set_core_data,
 )
 
@@ -275,7 +289,7 @@ def check_rosetta() -> None:
 
 
 @coroutine_with_priority(CoroPriority.PLATFORM)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add(esp8266_ns.setup_preferences())
 
     cg.add_platformio_option("lib_ldf_mode", "off")
@@ -395,8 +409,8 @@ async def to_code(config):
     )
 
     if config[CONF_BOARD] in BOARDS:
-        flash_size = BOARDS[config[CONF_BOARD]][KEY_FLASH_SIZE]
-        ld_scripts = ESP8266_LD_SCRIPTS[flash_size]
+        board_data = BOARDS[config[CONF_BOARD]]
+        ld_scripts = ESP8266_LD_SCRIPTS[board_data[KEY_FLASH_SIZE]]
 
         if ver <= cv.Version(2, 3, 0):
             # No ld script support
@@ -405,7 +419,9 @@ async def to_code(config):
             # Old ld script path
             ld_script = ld_scripts[0]
         else:
-            ld_script = ld_scripts[1]
+            # A per-board override preserves a layout the board shipped
+            # with (see d1_wroom_02 in boards.py)
+            ld_script = board_data.get("ldscript", ld_scripts[1])
 
         if ld_script is not None:
             cg.add_platformio_option("board_build.ldscript", ld_script)
@@ -504,7 +520,7 @@ ESP8266_EXCEPTION_CODES = {
 }
 
 
-def _decode_pc(config, addr):
+def _decode_pc(config: ConfigType, addr: str) -> None:
     from esphome.platformio import toolchain
 
     idedata = toolchain.get_idedata(config)
@@ -525,7 +541,7 @@ def _decode_pc(config, addr):
     _LOGGER.warning("Decoded %s", translation)
 
 
-def _parse_register(config, regex, line):
+def _parse_register(config: ConfigType, regex: re.Pattern[str], line: str) -> None:
     match = regex.match(line)
     if match is not None:
         _decode_pc(config, match.group(1))
@@ -549,7 +565,7 @@ STACKTRACE_BAD_ALLOC_RE = re.compile(
 STACKTRACE_ESP8266_BACKTRACE_PC_RE = re.compile(r"4[0-9a-f]{7}")
 
 
-def process_stacktrace(config, line, backtrace_state):
+def process_stacktrace(config: ConfigType, line: str, backtrace_state: bool) -> bool:
     line = line.strip()
     # ESP8266 Exception type
     match = re.match(STACKTRACE_ESP8266_EXCEPTION_TYPE_RE, line)

esphome/components/esp8266/boards.py

@@ -199,6 +199,15 @@ BOARDS = {
         "name": "WeMos D1 mini Pro",
         "flash_size": FLASH_SIZE_16_MB,
     },
+    "d1_wroom_02": {
+        "name": "WeMos D1 ESP-WROOM-02",
+        "flash_size": FLASH_SIZE_2_MB,
+        # This board joined BOARDS after shipping with the manifest default
+        # (64 KB filesystem region); the flash-size default (2m.ld) would
+        # move _FS_end and with it the preferences sector, wiping existing
+        # devices' flash-backed state on update.
+        "ldscript": "eagle.flash.2m64.ld",
+    },
     "d1": {
         "name": "WEMOS D1 R1",
         "flash_size": FLASH_SIZE_4_MB,
@@ -360,3 +369,112 @@ BOARDS = {
         "flash_size": FLASH_SIZE_4_MB,
     },
 }
+
+
+# Per-board variant dir + identity defines from platform-espressif8266 4.x
+# build.extra_flags; the shared -DESP8266/-DARDUINO_ARCH_ESP8266 are added
+# by the generator.
+#
+# Regenerate ESP8266_BOARD_BUILD with (v4.2.1 is the platform version the
+# native toolchain mirrors; regenerate against the tag when bumping it):
+#
+# git clone -b v4.2.1 https://github.com/platformio/platform-espressif8266
+# python3 - <<'EOF'
+# import json, glob, os
+# for f in sorted(glob.glob("platform-espressif8266/boards/*.json")):
+#     b = json.load(open(f))["build"]
+#     extra = b["extra_flags"]
+#     extra = extra.split() if isinstance(extra, str) else extra
+#     defines = [
+#         e[2:] for e in extra if e not in ("-DESP8266", "-DARDUINO_ARCH_ESP8266")
+#     ]
+#     entries = ", ".join(f'"{d}"' for d in defines) + ("," if len(defines) == 1 else "")
+#     board = os.path.splitext(os.path.basename(f))[0]
+#     print(f'    "{board}": {{"variant": "{b["variant"]}", "defines": ({entries})}},')
+# EOF
+ESP8266_BOARD_BUILD = {
+    "agruminolemon": {
+        "variant": "agruminolemonv4",
+        "defines": ("ARDUINO_ESP8266_AGRUMINO_LEMON_V4",),
+    },
+    "d1": {"variant": "d1", "defines": ("ARDUINO_ESP8266_WEMOS_D1R1",)},
+    "d1_mini": {"variant": "d1_mini", "defines": ("ARDUINO_ESP8266_WEMOS_D1MINI",)},
+    "d1_mini_lite": {
+        "variant": "d1_mini",
+        "defines": ("ARDUINO_ESP8266_WEMOS_D1MINILITE",),
+    },
+    "d1_mini_pro": {
+        "variant": "d1_mini",
+        "defines": ("ARDUINO_ESP8266_WEMOS_D1MINIPRO",),
+    },
+    "d1_wroom_02": {
+        "variant": "d1_mini",
+        "defines": ("ARDUINO_ESP8266_WEMOS_D1WROOM02",),
+    },
+    "eduinowifi": {
+        "variant": "eduinowifi",
+        "defines": ("ARDUINO_ESP8266_SCHIRMILABS_EDUINO_WIFI",),
+    },
+    "esp01": {"variant": "generic", "defines": ("ARDUINO_ESP8266_ESP01",)},
+    "esp01_1m": {"variant": "generic", "defines": ("ARDUINO_ESP8266_ESP01",)},
+    "esp07": {"variant": "generic", "defines": ("ARDUINO_ESP8266_ESP07",)},
+    "esp07s": {"variant": "nodemcu", "defines": ("ARDUINO_ESP8266_ESP07",)},
+    "esp12e": {"variant": "nodemcu", "defines": ("ARDUINO_ESP8266_ESP12",)},
+    "esp210": {"variant": "generic", "defines": ("ARDUINO_ESP8266_ESP210",)},
+    "esp8285": {"variant": "esp8285", "defines": ("ARDUINO_ESP8266_ESP01",)},
+    "esp_wroom_02": {
+        "variant": "nodemcu",
+        "defines": ("ARDUINO_ESP8266_ESP_WROOM_02",),
+    },
+    "espduino": {"variant": "ESPDuino", "defines": ("ARDUINO_ESP8266_ESP13",)},
+    "espectro": {"variant": "espectro", "defines": ("ARDUINO_ESP8266_ESPECTRO_CORE",)},
+    "espino": {"variant": "espino", "defines": ("ARDUINO_ESP8266_ESP12",)},
+    "espinotee": {"variant": "espinotee", "defines": ("ARDUINO_ESP8266_ESP13",)},
+    "espmxdevkit": {
+        "variant": "esp8285",
+        "defines": ("ARDUINO_ESP8266_ESP01", "LED_BUILTIN=16"),
+    },
+    "espresso_lite_v1": {
+        "variant": "espresso_lite_v1",
+        "defines": ("ARDUINO_ESP8266_ESPRESSO_LITE_V1",),
+    },
+    "espresso_lite_v2": {
+        "variant": "espresso_lite_v2",
+        "defines": ("ARDUINO_ESP8266_ESPRESSO_LITE_V2",),
+    },
+    "gen4iod": {"variant": "generic", "defines": ("ARDUINO_GEN4_IOD",)},
+    "heltec_wifi_kit_8": {
+        "variant": "wifi_kit_8",
+        "defines": ("ARDUINO_wifi_kit_8",),
+    },
+    "huzzah": {"variant": "adafruit", "defines": ("ARDUINO_ESP8266_ADAFRUIT_HUZZAH",)},
+    "inventone": {"variant": "inventone", "defines": ("ARDUINO_ESP8266_INVENT_ONE",)},
+    "modwifi": {"variant": "generic", "defines": ("ARDUINO_MOD_WIFI_ESP8266",)},
+    "nodemcu": {"variant": "nodemcu", "defines": ("ARDUINO_ESP8266_NODEMCU",)},
+    "nodemcuv2": {"variant": "nodemcu", "defines": ("ARDUINO_ESP8266_NODEMCU_ESP12E",)},
+    "oak": {"variant": "oak", "defines": ("ARDUINO_ESP8266_OAK",)},
+    "phoenix_v1": {
+        "variant": "phoenix_v1",
+        "defines": ("ARDUINO_ESP8266_PHOENIX_V1",),
+    },
+    "phoenix_v2": {
+        "variant": "phoenix_v2",
+        "defines": ("ARDUINO_ESP8266_PHOENIX_V2",),
+    },
+    "sonoff_basic": {"variant": "itead", "defines": ("ARDUINO_ESP8266_SONOFF_BASIC",)},
+    "sonoff_s20": {"variant": "itead", "defines": ("ARDUINO_ESP8266_SONOFF_S20",)},
+    "sonoff_sv": {"variant": "itead", "defines": ("ARDUINO_ESP8266_SONOFF_SV",)},
+    "sonoff_th": {"variant": "itead", "defines": ("ARDUINO_ESP8266_SONOFF_TH",)},
+    "sparkfunBlynk": {"variant": "thing", "defines": ("ARDUINO_ESP8266_THING",)},
+    "thing": {"variant": "thing", "defines": ("ARDUINO_ESP8266_THING",)},
+    "thingdev": {"variant": "thing", "defines": ("ARDUINO_ESP8266_THING_DEV",)},
+    "wifi_slot": {"variant": "wifi_slot", "defines": ("ARDUINO_AMPERKA_WIFI_SLOT",)},
+    "wifiduino": {"variant": "wifiduino", "defines": ("ARDUINO_WIFIDUINO_ESP8266",)},
+    "wifinfo": {"variant": "wifinfo", "defines": ("ARDUINO_WIFINFO",)},
+    "wio_link": {"variant": "wiolink", "defines": ("ARDUINO_ESP8266_WIO_LINK",)},
+    "wio_node": {"variant": "nodemcu", "defines": ("ARDUINO_ESP8266_ESP_WROOM_02",)},
+    "xinabox_cw01": {
+        "variant": "xinabox",
+        "defines": ("ARDUINO_ESP8266_XINABOX_CW01",),
+    },
+}

esphome/components/esp8266/build_surgery.py

@@ -0,0 +1,118 @@
+"""Linker-script surgery shared with the native (PlatformIO-free) toolchain.
+
+These mirror the PlatformIO extra scripts in this directory
+(``relocate_ratetable.py.script`` and ``testing_mode.py.script``), which run
+inside SCons and must stay self-contained. The native build generator applies
+the same patches to the linker scripts it generates, so the logic lives here
+as plain functions. Keep both in sync when changing either.
+``segment_length`` is native-toolchain-only and has no script twin.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Collection
+import hashlib
+import re
+
+# Move the NONOS SDK wifi rate tables from flash to DRAM; see
+# relocate_ratetable.py.script for the full background (NONOS SDK issue 320).
+RATETABLE_RULE = "*libnet80211.a:ieee80211_phy.o(.irom.text .irom.text.*)"
+_RATETABLE_COMMENT = (
+    "/* ESPHome: wifi rate tables must live in DRAM, see NONOS SDK issue 320 */"
+)
+# Match the whole line: "_data_start" is also a substring of the
+# "_dport0_data_start" line in the earlier .dport0.data section
+_RATETABLE_ANCHOR = re.compile(r"^\s*_data_start = ABSOLUTE\(\.\);", re.MULTILINE)
+
+# Memory sizes for testing mode (allow larger builds for CI component grouping)
+TESTING_IRAM_SIZE = "0x200000"  # 2MB
+TESTING_DRAM_SIZE = "0x200000"  # 2MB
+TESTING_FLASH_SIZE = "0x2000000"  # 32MB
+
+
+def relocate_ratetable(content: str) -> str:
+    """Insert the rate-table DRAM rule into a generated common linker script."""
+    if RATETABLE_RULE in content:
+        return content
+    match = _RATETABLE_ANCHOR.search(content)
+    if match is None:
+        raise RuntimeError(
+            "'_data_start' anchor not found in the generated linker script; "
+            "cannot apply wifi rate table DRAM relocation "
+            "(has the Arduino core linker script changed?)"
+        )
+    insert_pos = match.end()
+    return (
+        content[:insert_pos]
+        + f"\n    {_RATETABLE_COMMENT}"
+        + f"\n    {RATETABLE_RULE}"
+        + content[insert_pos:]
+    )
+
+
+_TESTING_SEGMENT_SIZES = {
+    "iram1_0_seg": TESTING_IRAM_SIZE,
+    "dram0_0_seg": TESTING_DRAM_SIZE,
+    "irom0_0_seg": TESTING_FLASH_SIZE,
+}
+
+
+def _segment_line_re(segment_name: str) -> re.Pattern[str]:
+    """The MEMORY line for one segment: ``<seg> : org = 0x..., len = 0x...``.
+
+    Anchored to the start of the line so a name never matches inside a
+    longer one (``ram0_0_seg`` must not read ``dram0_0_seg``). The size
+    group stops at the hex digits, leaving any ``ul`` suffix (from the
+    preprocessed ``MMU_IRAM_SIZE``) in place.
+    """
+    return re.compile(
+        rf"(^[ \t]*{re.escape(segment_name)}"
+        r"\s*:\s*org\s*=\s*0x[0-9a-fA-F]+\s*,\s*len\s*=\s*)"
+        r"(0x[0-9a-fA-F]+)",
+        re.MULTILINE,
+    )
+
+
+def apply_testing_memory_patches(content: str, segments: Collection[str]) -> str:
+    """Enlarge the named memory segments so grouped CI test builds can link.
+
+    Each caller passes the segments its linker script defines: the
+    generated common ld carries ``iram1_0_seg``; the flash ld carries
+    ``dram0_0_seg`` and ``irom0_0_seg``. A segment that fails to match
+    raises, since a silently kept real memory limit would fail grouped
+    builds far from the cause.
+    """
+    for segment in _TESTING_SEGMENT_SIZES:
+        if segment not in segments and _segment_line_re(segment).search(content):
+            raise RuntimeError(
+                f"Testing-mode segment {segment} is present in the linker "
+                "script but was not selected for patching"
+            )
+    for segment in segments:
+        if segment not in _TESTING_SEGMENT_SIZES:
+            raise RuntimeError(f"Unknown testing-mode segment {segment!r}")
+        content, count = _segment_line_re(segment).subn(
+            rf"\g<1>{_TESTING_SEGMENT_SIZES[segment]}", content
+        )
+        if count == 0:
+            raise RuntimeError(
+                f"Testing-mode memory patch failed: segment {segment} "
+                "not found (has the Arduino core linker script changed?)"
+            )
+    return content
+
+
+def segment_length(content: str, segment_name: str) -> int | None:
+    """Read a memory segment's length from linker script content."""
+    match = _segment_line_re(segment_name).search(content)
+    return int(match.group(2), 16) if match else None
+
+
+def surgery_fingerprint() -> str:
+    """Hash of this module's source; linker-script caches include it so an
+    edit here invalidates them."""
+    import inspect
+    import sys
+
+    source = inspect.getsource(sys.modules[__name__])
+    return hashlib.sha256(source.encode()).hexdigest()

esphome/components/esp8266/const.py

@@ -15,6 +15,9 @@ CONF_ENABLE_SERIAL1 = "enable_serial1"
 KEY_WAVEFORM_REQUIRED = "waveform_required"
 KEY_SERIAL_REQUIRED = "serial_required"
 KEY_SERIAL1_REQUIRED = "serial1_required"
+# Set for the native (non-PlatformIO) toolchain's build generator
+KEY_FLASH_MODE = "flash_mode"
+KEY_SCANF_FLOAT = "scanf_float"
 
 # esp8266 namespace is already defined by arduino, manually prefix esphome
 esp8266_ns = cg.global_ns.namespace("esphome").namespace("esp8266")

esphome/components/esp8266/crash_handler.cpp

@@ -118,8 +118,6 @@ static const LogString *get_exception_cause(uint32_t cause) {
 }
 
 static const LogString *get_reset_reason(uint32_t reason) {
-  if (reason == REASON_WDT_RST)
-    return LOG_STR("Hardware WDT");
   if (reason == REASON_EXCEPTION_RST)
     return LOG_STR("Exception");
   if (reason == REASON_SOFT_WDT_RST)
@@ -162,13 +160,20 @@ void crash_handler_log() {
   if (!is_crash_reason(resetInfo.reason))
     return;
 
+  ESP_LOGE(TAG, "*** CRASH DETECTED ON PREVIOUS BOOT ***");
+  if (resetInfo.reason == REASON_WDT_RST) {
+    // A hardware WDT reset happens entirely in hardware: the postmortem hook
+    // never runs, so rst_info epc1/exccause and the RTC backtrace are
+    // leftovers from an earlier crash. Don't misattribute them (#18596).
+    ESP_LOGE(TAG, "  Reason: Hardware WDT (no crash state is recorded for hardware WDT resets)");
+    return;
+  }
+
   // Read and filter backtrace from RTC into stack-local buffer (no persistent RAM cost).
   // Both resetInfo and RTC data survive until the next reset, so this can be
   // called multiple times (logger init + API subscribe) with the same result.
   uint32_t backtrace[MAX_BACKTRACE];
   uint8_t bt_count = read_rtc_backtrace(backtrace, MAX_BACKTRACE);
-
-  ESP_LOGE(TAG, "*** CRASH DETECTED ON PREVIOUS BOOT ***");
   // GCC's ROM divide routine triggers IllegalInstruction (exccause=0) at specific
   // ROM addresses instead of IntegerDivideByZero (exccause=6). Patch to match
   // the Arduino core's postmortem handler behavior.

esphome/components/esp8266/gpio.py

@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 import logging
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -18,6 +19,8 @@ from esphome.const import (
     PLATFORM_ESP8266,
 )
 from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from . import boards
 from .const import KEY_BOARD, KEY_ESP8266, KEY_PIN_INITIAL_STATES, esp8266_ns
@@ -27,7 +30,7 @@ _LOGGER = logging.getLogger(__name__)
 ESP8266GPIOPin = esp8266_ns.class_("ESP8266GPIOPin", cg.InternalGPIOPin)
 
 
-def _lookup_pin(value):
+def _lookup_pin(value: str) -> int:
     board = CORE.data[KEY_ESP8266][KEY_BOARD]
     board_pins = boards.ESP8266_BOARD_PINS.get(board, {})
 
@@ -42,7 +45,7 @@ def _lookup_pin(value):
     raise cv.Invalid(f"Cannot resolve pin name '{value}' for board {board}.")
 
 
-def _translate_pin(value):
+def _translate_pin(value: Any) -> int:
     if isinstance(value, dict) or value is None:
         raise cv.Invalid(
             "This variable only supports pin numbers, not full pin schemas "
@@ -69,7 +72,7 @@ _ESP_SDIO_PINS = {
 }
 
 
-def validate_gpio_pin(value):
+def validate_gpio_pin(value: Any) -> int:
     value = _translate_pin(value)
     if value < 0 or value > 17:
         raise cv.Invalid(f"ESP8266: Invalid pin number: {value}")
@@ -86,7 +89,7 @@ def validate_gpio_pin(value):
     return value
 
 
-def validate_supports(value):
+def validate_supports(value: ConfigType) -> ConfigType:
     num = value[CONF_NUMBER]
     mode = value[CONF_MODE]
     is_input = mode[CONF_INPUT]
@@ -160,7 +163,7 @@ class PinInitialState:
 
 
 @pins.PIN_SCHEMA_REGISTRY.register(PLATFORM_ESP8266, ESP8266_PIN_SCHEMA)
-async def esp8266_pin_to_code(config):
+async def esp8266_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     num = config[CONF_NUMBER]
     mode = config[CONF_MODE]
@@ -192,7 +195,7 @@ async def esp8266_pin_to_code(config):
 
 
 @coroutine_with_priority(CoroPriority.WORKAROUNDS)
-async def add_pin_initial_states_array():
+async def add_pin_initial_states_array() -> None:
     # Add includes at the very end, so that they override everything
     initial_states: list[PinInitialState] = CORE.data[KEY_ESP8266][
         KEY_PIN_INITIAL_STATES

esphome/components/esphome/ota/ota_esphome.cpp

@@ -588,8 +588,6 @@ bool ESPHomeOTAComponent::writeall_(const uint8_t *buf, size_t len) {
 }
 
 float ESPHomeOTAComponent::get_setup_priority() const { return setup_priority::AFTER_WIFI; }
-uint16_t ESPHomeOTAComponent::get_port() const { return this->port_; }
-void ESPHomeOTAComponent::set_port(uint16_t port) { this->port_ = port; }
 
 void ESPHomeOTAComponent::log_socket_error_(const LogString *msg) {
   ESP_LOGW(TAG, "Socket %s: errno %d", LOG_STR_ARG(msg), errno);

esphome/components/esphome/ota/ota_esphome.h

@@ -39,14 +39,14 @@ class ESPHomeOTAComponent final : public ota::OTAComponent {
 #endif  // USE_OTA_PASSWORD
 
   /// Manually set the port OTA should listen on
-  void set_port(uint16_t port);
+  void set_port(uint16_t port) { this->port_ = port; }
 
   void setup() override;
   void dump_config() override;
   float get_setup_priority() const override;
   void loop() override;
 
-  uint16_t get_port() const;
+  uint16_t get_port() const { return this->port_; }
 
  protected:
   void handle_handshake_();

esphome/components/ethernet/ethernet_component.cpp

@@ -10,14 +10,6 @@ EthernetComponent *global_eth_component;  // NOLINT(cppcoreguidelines-avoid-non-
 
 EthernetComponent::EthernetComponent() { global_eth_component = this; }
 
-float EthernetComponent::get_setup_priority() const { return setup_priority::WIFI; }
-
-void EthernetComponent::set_type(EthernetType type) { this->type_ = type; }
-
-#ifdef USE_ETHERNET_MANUAL_IP
-void EthernetComponent::set_manual_ip(const ManualIP &manual_ip) { this->manual_ip_ = manual_ip; }
-#endif
-
 #ifdef USE_ETHERNET_IP_STATE_LISTENERS
 void EthernetComponent::notify_ip_state_listeners_() {
   auto ips = this->get_ip_addresses();

esphome/components/ethernet/ethernet_component.h

@@ -125,7 +125,7 @@ class EthernetComponent final : public Component {
   void setup() override;
   void loop() override;
   void dump_config() override;
-  float get_setup_priority() const override;
+  float get_setup_priority() const override { return setup_priority::ETHERNET; }
   void on_powerdown() override { powerdown(); }
   bool is_connected() { return this->state_ == EthernetComponentState::CONNECTED; }
 
@@ -146,9 +146,9 @@ class EthernetComponent final : public Component {
   esp_netif_t *get_esp_netif() { return this->eth_netif_; }
 #endif
 
-  void set_type(EthernetType type);
+  void set_type(EthernetType type) { this->type_ = type; }
 #ifdef USE_ETHERNET_MANUAL_IP
-  void set_manual_ip(const ManualIP &manual_ip);
+  void set_manual_ip(const ManualIP &manual_ip) { this->manual_ip_ = manual_ip; }
 #endif
   void set_fixed_mac(const std::array<uint8_t, MAC_ADDRESS_SIZE> &mac) { this->fixed_mac_ = mac; }
 
@@ -171,35 +171,35 @@ class EthernetComponent final : public Component {
   esp_eth_handle_t get_eth_handle() const { return this->eth_handle_; }
 
 #ifdef USE_ETHERNET_SPI
-  void set_clk_pin(uint8_t clk_pin);
-  void set_miso_pin(uint8_t miso_pin);
-  void set_mosi_pin(uint8_t mosi_pin);
-  void set_cs_pin(uint8_t cs_pin);
-  void set_interrupt_pin(uint8_t interrupt_pin);
-  void set_reset_pin(uint8_t reset_pin);
-  void set_clock_speed(int clock_speed);
-  void set_interface(spi_host_device_t interface);
+  void set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
+  void set_miso_pin(uint8_t miso_pin) { this->miso_pin_ = miso_pin; }
+  void set_mosi_pin(uint8_t mosi_pin) { this->mosi_pin_ = mosi_pin; }
+  void set_cs_pin(uint8_t cs_pin) { this->cs_pin_ = cs_pin; }
+  void set_interrupt_pin(uint8_t interrupt_pin) { this->interrupt_pin_ = interrupt_pin; }
+  void set_reset_pin(uint8_t reset_pin) { this->reset_pin_ = reset_pin; }
+  void set_clock_speed(int clock_speed) { this->clock_speed_ = clock_speed; }
+  void set_interface(spi_host_device_t interface) { this->interface_ = interface; }
 #ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
-  void set_polling_interval(uint32_t polling_interval);
+  void set_polling_interval(uint32_t polling_interval) { this->polling_interval_ = polling_interval; }
 #endif
 #else
-  void set_phy_addr(uint8_t phy_addr);
-  void set_power_pin(int power_pin);
-  void set_mdc_pin(uint8_t mdc_pin);
-  void set_mdio_pin(uint8_t mdio_pin);
-  void set_clk_pin(uint8_t clk_pin);
-  void set_clk_mode(emac_rmii_clock_mode_t clk_mode);
+  void set_phy_addr(uint8_t phy_addr) { this->phy_addr_ = phy_addr; }
+  void set_power_pin(int power_pin) { this->power_pin_ = power_pin; }
+  void set_mdc_pin(uint8_t mdc_pin) { this->mdc_pin_ = mdc_pin; }
+  void set_mdio_pin(uint8_t mdio_pin) { this->mdio_pin_ = mdio_pin; }
+  void set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
+  void set_clk_mode(emac_rmii_clock_mode_t clk_mode) { this->clk_mode_ = clk_mode; }
   void add_phy_register(PHYRegister register_value);
 #endif  // USE_ETHERNET_SPI
 #endif  // USE_ESP32
 
 #ifdef USE_RP2
-  void set_clk_pin(uint8_t clk_pin);
-  void set_miso_pin(uint8_t miso_pin);
-  void set_mosi_pin(uint8_t mosi_pin);
-  void set_cs_pin(uint8_t cs_pin);
-  void set_interrupt_pin(int8_t interrupt_pin);
-  void set_reset_pin(int8_t reset_pin);
+  void set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
+  void set_miso_pin(uint8_t miso_pin) { this->miso_pin_ = miso_pin; }
+  void set_mosi_pin(uint8_t mosi_pin) { this->mosi_pin_ = mosi_pin; }
+  void set_cs_pin(uint8_t cs_pin) { this->cs_pin_ = cs_pin; }
+  void set_interrupt_pin(int8_t interrupt_pin) { this->interrupt_pin_ = interrupt_pin; }
+  void set_reset_pin(int8_t reset_pin) { this->reset_pin_ = reset_pin; }
 #endif  // USE_RP2
 
 #ifdef USE_ETHERNET_IP_STATE_LISTENERS

esphome/components/ethernet/ethernet_component_esp32.cpp

@@ -908,25 +908,7 @@ void EthernetComponent::dump_connect_params_() {
 #endif /* USE_NETWORK_IPV6 */
 }
 
-#ifdef USE_ETHERNET_SPI
-void EthernetComponent::set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
-void EthernetComponent::set_miso_pin(uint8_t miso_pin) { this->miso_pin_ = miso_pin; }
-void EthernetComponent::set_mosi_pin(uint8_t mosi_pin) { this->mosi_pin_ = mosi_pin; }
-void EthernetComponent::set_cs_pin(uint8_t cs_pin) { this->cs_pin_ = cs_pin; }
-void EthernetComponent::set_interrupt_pin(uint8_t interrupt_pin) { this->interrupt_pin_ = interrupt_pin; }
-void EthernetComponent::set_reset_pin(uint8_t reset_pin) { this->reset_pin_ = reset_pin; }
-void EthernetComponent::set_clock_speed(int clock_speed) { this->clock_speed_ = clock_speed; }
-void EthernetComponent::set_interface(spi_host_device_t interface) { this->interface_ = interface; }
-#ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
-void EthernetComponent::set_polling_interval(uint32_t polling_interval) { this->polling_interval_ = polling_interval; }
-#endif
-#else
-void EthernetComponent::set_phy_addr(uint8_t phy_addr) { this->phy_addr_ = phy_addr; }
-void EthernetComponent::set_power_pin(int power_pin) { this->power_pin_ = power_pin; }
-void EthernetComponent::set_mdc_pin(uint8_t mdc_pin) { this->mdc_pin_ = mdc_pin; }
-void EthernetComponent::set_mdio_pin(uint8_t mdio_pin) { this->mdio_pin_ = mdio_pin; }
-void EthernetComponent::set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
-void EthernetComponent::set_clk_mode(emac_rmii_clock_mode_t clk_mode) { this->clk_mode_ = clk_mode; }
+#ifndef USE_ETHERNET_SPI
 void EthernetComponent::add_phy_register(PHYRegister register_value) { this->phy_registers_.push_back(register_value); }
 #endif
 

esphome/components/ethernet/ethernet_component_rp2.cpp

@@ -355,13 +355,6 @@ void EthernetComponent::dump_connect_params_() {
                 this->get_eth_mac_address_pretty_into_buffer(mac_buf));
 }
 
-void EthernetComponent::set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
-void EthernetComponent::set_miso_pin(uint8_t miso_pin) { this->miso_pin_ = miso_pin; }
-void EthernetComponent::set_mosi_pin(uint8_t mosi_pin) { this->mosi_pin_ = mosi_pin; }
-void EthernetComponent::set_cs_pin(uint8_t cs_pin) { this->cs_pin_ = cs_pin; }
-void EthernetComponent::set_interrupt_pin(int8_t interrupt_pin) { this->interrupt_pin_ = interrupt_pin; }
-void EthernetComponent::set_reset_pin(int8_t reset_pin) { this->reset_pin_ = reset_pin; }
-
 void EthernetComponent::enable() {
   // RP2040 uses arduino-pico's LwipIntfDev which manages link state internally;
   // there is no clean enable/disable hook today. The YAML option is accepted on

esphome/components/fan/fan.cpp

@@ -153,11 +153,6 @@ void FanRestoreState::apply(Fan &fan) {
   fan.publish_state();
 }
 
-FanCall Fan::turn_on() { return this->make_call().set_state(true); }
-FanCall Fan::turn_off() { return this->make_call().set_state(false); }
-FanCall Fan::toggle() { return this->make_call().set_state(!this->state); }
-FanCall Fan::make_call() { return FanCall(*this); }
-
 const char *Fan::find_preset_mode_(const char *preset_mode) {
   return this->find_preset_mode_(preset_mode, preset_mode ? strlen(preset_mode) : 0);
 }

esphome/components/fan/fan.h

@@ -115,10 +115,10 @@ class Fan : public EntityBase {
   /// The current direction of the fan
   FanDirection direction{FanDirection::FORWARD};
 
-  FanCall turn_on();
-  FanCall turn_off();
-  FanCall toggle();
-  FanCall make_call();
+  FanCall turn_on() { return this->make_call().set_state(true); }
+  FanCall turn_off() { return this->make_call().set_state(false); }
+  FanCall toggle() { return this->make_call().set_state(!this->state); }
+  FanCall make_call() { return FanCall(*this); }
 
   /// Register a callback that will be called each time the state changes.
   template<typename F> void add_on_state_callback(F &&callback) {

esphome/components/file/image.py

@@ -5,6 +5,7 @@ import io
 import logging
 from pathlib import Path
 import re
+from typing import Any
 
 from PIL import Image, UnidentifiedImageError
 
@@ -75,12 +76,12 @@ def compute_local_image_path(value: str | ConfigType) -> Path:
     return external_files.compute_local_file_path(DOMAIN, url)
 
 
-def local_path(value):
+def local_path(value: str | ConfigType) -> str:
     value = value[CONF_PATH] if isinstance(value, dict) else value
     return str(CORE.relative_config_path(value))
 
 
-def download_file(url, path):
+def download_file(url: str, path: Path) -> str:
     # The shared NETWORK_TIMEOUT applies; a per-caller timeout would be
     # silently ignored on a per-run memo hit anyway (memos key by path).
     external_files.download_content(url, path)
@@ -98,7 +99,7 @@ def download_gh_svg(value: str | ConfigType, source: str) -> str:
     return download_file(url, path)
 
 
-def download_image(value):
+def download_image(value: str | ConfigType) -> str:
     value = value[CONF_URL] if isinstance(value, dict) else value
     return download_file(value, compute_local_image_path(value))
 
@@ -146,7 +147,7 @@ def _extract_entry_ref(entry: ConfigType) -> RemoteFile | None:
 PREFETCH_FILES = external_files.single_stage_prefetch(_extract_entry_ref)
 
 
-def validate_file_shorthand(value):
+def validate_file_shorthand(value: Any) -> str:
     value = cv.string_strict(value)
     if (remote := _parse_remote_shorthand(value)) is not None:
         return download_file(remote.url, remote.path)
@@ -163,8 +164,8 @@ LOCAL_SCHEMA = cv.All(
 )
 
 
-def mdi_schema(source):
-    def validate_mdi(value):
+def mdi_schema(source: str) -> cv.All:
+    def validate_mdi(value: ConfigType) -> str:
         return download_gh_svg(value, source)
 
     return cv.All(
@@ -259,7 +260,9 @@ async def new_image(config: ConfigType) -> MockObj:
     return var
 
 
-async def write_image(config, all_frames=False):
+async def write_image(
+    config: ConfigType, all_frames: bool = False
+) -> tuple[MockObj, int, int, MockObj, MockObj, int]:
     path = Path(config[CONF_FILE])
     if not path.is_file():
         raise core.EsphomeError(f"Could not load image file {path}")

esphome/components/globals/__init__.py

@@ -8,7 +8,8 @@ from esphome.const import (
     CONF_TYPE,
     CONF_VALUE,
 )
-from esphome.core import CoroPriority, coroutine_with_priority
+from esphome.core import ID, CoroPriority, coroutine_with_priority
+from esphome.cpp_generator import MockObj, TemplateArgsType
 from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
@@ -62,7 +63,7 @@ CONFIG_SCHEMA = _globals_schema
 
 # Run with low priority so that namespaces are registered first
 @coroutine_with_priority(CoroPriority.LATE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     type_ = cg.RawExpression(config[CONF_TYPE])
     restore = config[CONF_RESTORE_VALUE]
 
@@ -104,7 +105,12 @@ async def to_code(config):
     ),
     synchronous=True,
 )
-async def globals_set_to_code(config, action_id, template_arg, args):
+async def globals_set_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     full_id, paren = await cg.get_variable_with_full_id(config[CONF_ID])
     template_arg = cg.TemplateArguments(full_id.type, *template_arg)
     var = cg.new_Pvariable(action_id, template_arg, paren)

esphome/components/gpio/binary_sensor/__init__.py

@@ -12,6 +12,7 @@ from esphome.const import (
     CONF_PIN,
 )
 from esphome.core import CORE
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -68,7 +69,7 @@ def _pin_shared_only_with_deep_sleep(pin_num: int) -> bool:
     return any(path and path[0] == "deep_sleep" for path, _, _ in pin_users)
 
 
-def _final_validate(config) -> None:
+def _final_validate(config: ConfigType) -> None:
     use_interrupt = config[CONF_USE_INTERRUPT]
     if not use_interrupt:
         return
@@ -124,7 +125,7 @@ def _final_validate(config) -> None:
 FINAL_VALIDATE_SCHEMA = _final_validate
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     await cg.register_component(var, config)
 

esphome/components/gpio/one_wire/__init__.py

@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components.one_wire import OneWireBus
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = cv.Schema(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
 

esphome/components/gpio/output/__init__.py

@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import output
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = output.BINARY_OUTPUT_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await output.register_output(var, config)
     await cg.register_component(var, config)

esphome/components/gpio/switch/__init__.py

@@ -3,6 +3,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_INTERLOCK, CONF_PIN
+from esphome.types import ConfigType
 
 from .. import gpio_ns
 
@@ -24,7 +25,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await switch.new_switch(config)
     await cg.register_component(var, config)
 

esphome/components/homeassistant/__init__.py

@@ -1,13 +1,19 @@
+from collections.abc import Callable, Iterable
+
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.const import CONF_ATTRIBUTE, CONF_ENTITY_ID, CONF_INTERNAL
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@OttoWinter", "@esphome/core"]
 homeassistant_ns = cg.esphome_ns.namespace("homeassistant")
 
 
-def validate_entity_domain(platform, supported_domains):
-    def validator(config):
+def validate_entity_domain(
+    platform: str, supported_domains: Iterable[str]
+) -> Callable[[ConfigType], ConfigType]:
+    def validator(config: ConfigType) -> ConfigType:
         domain = config[CONF_ENTITY_ID].split(".", 1)[0]
         if domain not in supported_domains:
             raise cv.Invalid(
@@ -34,7 +40,7 @@ HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA = cv.Schema(
 )
 
 
-def setup_home_assistant_entity(var, config):
+def setup_home_assistant_entity(var: MockObj, config: ConfigType) -> None:
     cg.add(var.set_entity_id(config[CONF_ENTITY_ID]))
     if CONF_ATTRIBUTE in config:
         cg.add(var.set_attribute(config[CONF_ATTRIBUTE]))

esphome/components/homeassistant/binary_sensor/__init__.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import binary_sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(HomeassistantBinarySensor).ex
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await binary_sensor.new_binary_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)

esphome/components/homeassistant/number/__init__.py

@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import number
 import esphome.config_validation as cv
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA,
@@ -22,7 +23,7 @@ CONFIG_SCHEMA = (
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     var = await number.new_number(
         config,

esphome/components/homeassistant/sensor/__init__.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(HomeassistantSensor, accuracy_decimals=1).e
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await sensor.new_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)

esphome/components/homeassistant/switch/__init__.py

@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import switch
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_CONTROL_SCHEMA,
@@ -36,7 +37,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_define("USE_API_HOMEASSISTANT_SERVICES")
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)

esphome/components/homeassistant/text_sensor/__init__.py

@@ -1,5 +1,6 @@
 import esphome.codegen as cg
 from esphome.components import text_sensor
+from esphome.types import ConfigType
 
 from .. import (
     HOME_ASSISTANT_IMPORT_SCHEMA,
@@ -18,7 +19,7 @@ CONFIG_SCHEMA = text_sensor.text_sensor_schema(HomeassistantTextSensor).extend(
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = await text_sensor.new_text_sensor(config)
     await cg.register_component(var, config)
     setup_home_assistant_entity(var, config)

esphome/components/homeassistant/time/__init__.py

@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import time as time_
 import esphome.config_validation as cv
 from esphome.const import CONF_ID, CONF_TIMEZONE
+from esphome.types import ConfigType
 
 from .. import homeassistant_ns
 
@@ -16,7 +17,7 @@ CONFIG_SCHEMA = time_.TIME_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await time_.register_time(var, config)
     await cg.register_component(var, config)

esphome/components/host/__init__.py

@@ -11,6 +11,7 @@ from esphome.const import (
 )
 from esphome.core import CORE
 from esphome.platformio.toolchain import copy_ccache_script
+from esphome.types import ConfigType
 
 from .const import KEY_HOST
 
@@ -22,7 +23,7 @@ AUTO_LOAD = ["network", "preferences"]
 IS_TARGET_PLATFORM = True
 
 
-def set_core_data(config):
+def set_core_data(config: ConfigType) -> ConfigType:
     CORE.data[KEY_HOST] = {}
     CORE.data[KEY_CORE][KEY_TARGET_PLATFORM] = PLATFORM_HOST
     CORE.data[KEY_CORE][KEY_TARGET_FRAMEWORK] = "host"
@@ -36,11 +37,12 @@ CONFIG_SCHEMA = cv.All(
             cv.Optional(CONF_MAC_ADDRESS, default="98:35:69:ab:f6:79"): cv.mac_address,
         }
     ),
+    cv.require_platformio_toolchain("host"),
     set_core_data,
 )
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_build_flag("-DUSE_HOST")
     cg.add_define("USE_NATIVE_64BIT_TIME")
     # The prefs file finds stored preferences by key, so key migration is possible

esphome/components/host/gpio.py

@@ -1,4 +1,5 @@
 import logging
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -14,6 +15,8 @@ from esphome.const import (
     CONF_PULLDOWN,
     CONF_PULLUP,
 )
+from esphome.cpp_generator import MockObj
+from esphome.types import ConfigType
 
 from .const import host_ns
 
@@ -22,7 +25,7 @@ _LOGGER = logging.getLogger(__name__)
 HostGPIOPin = host_ns.class_("HostGPIOPin", cg.InternalGPIOPin)
 
 
-def _translate_pin(value):
+def _translate_pin(value: Any) -> int | str:
     if isinstance(value, dict) or value is None:
         raise cv.Invalid(
             "This variable only supports pin numbers, not full pin schemas "
@@ -41,7 +44,7 @@ def _translate_pin(value):
     return value
 
 
-def validate_gpio_pin(value):
+def validate_gpio_pin(value: Any) -> int | str:
     return _translate_pin(value)
 
 
@@ -53,7 +56,7 @@ HOST_PIN_SCHEMA = pins.gpio_base_schema(
 
 
 @pins.PIN_SCHEMA_REGISTRY.register("host", HOST_PIN_SCHEMA)
-async def host_pin_to_code(config):
+async def host_pin_to_code(config: ConfigType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID])
     num = config[CONF_NUMBER]
     cg.add(var.set_pin(num))

esphome/components/host/time/__init__.py

@@ -2,6 +2,7 @@ import esphome.codegen as cg
 from esphome.components import time as time_
 import esphome.config_validation as cv
 from esphome.const import CONF_ID
+from esphome.types import ConfigType
 
 CODEOWNERS = ["@clydebarrow"]
 
@@ -14,7 +15,7 @@ CONFIG_SCHEMA = time_.TIME_SCHEMA.extend(
 ).extend(cv.COMPONENT_SCHEMA)
 
 
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     var = cg.new_Pvariable(config[CONF_ID])
     await cg.register_component(var, config)
     await time_.register_time(var, config)

esphome/components/i2c/__init__.py

@@ -1,6 +1,7 @@
 import logging
 import re
 import sys
+from typing import Any
 
 from esphome import pins
 import esphome.codegen as cg
@@ -52,9 +53,10 @@ from esphome.const import (
     PLATFORM_RP2,
     PlatformFramework,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.cpp_generator import MockObj
 import esphome.final_validate as fv
+from esphome.types import ConfigType
 
 LOGGER = logging.getLogger(__name__)
 CODEOWNERS = ["@esphome/core"]
@@ -96,13 +98,13 @@ CONF_SCL_PULLUP_ENABLED = "scl_pullup_enabled"
 MULTI_CONF = True
 
 
-def validate_device(value):
+def validate_device(value: str) -> str:
     if not re.match(r"^/(?:[^/]+/)*[^/]+$", value):
         raise cv.Invalid("Device must be an absolute device path (e.g., /dev/i2c-0)")
     return value
 
 
-def _bus_declare_type(value):
+def _bus_declare_type(value: Any) -> ID:
     if CORE.is_esp32:
         return cv.declare_id(IDFI2CBus)(value)
     if CORE.using_arduino:
@@ -114,7 +116,7 @@ def _bus_declare_type(value):
     raise NotImplementedError
 
 
-def _rp2040_i2c_controller(pin):
+def _rp2040_i2c_controller(pin: int) -> int:
     """Return the I2C controller number (0 or 1) for a given RP2040/RP2350 GPIO pin.
 
     See RP2040 datasheet Table 2 (section 1.4.3, "GPIO Functions"):
@@ -125,7 +127,7 @@ def _rp2040_i2c_controller(pin):
     return (pin // 2) % 2
 
 
-def validate_config(config):
+def validate_config(config: ConfigType) -> ConfigType:
     if CORE.is_esp32:
         return cv.require_framework_version(
             esp_idf=cv.Version(5, 4, 2), esp32_arduino=cv.Version(3, 2, 1)
@@ -142,7 +144,7 @@ def validate_config(config):
     return config
 
 
-def validate_host_config(config):
+def validate_host_config(config: ConfigType) -> ConfigType:
     if CORE.is_host:
         # Host I2C is currently only supported on Linux
         if not sys.platform.lower().startswith("linux"):
@@ -229,7 +231,7 @@ CONFIG_SCHEMA = cv.All(
 )
 
 
-def _final_validate(config):
+def _final_validate(config: ConfigType) -> None:
     full_config = fv.full_config.get()[CONF_I2C]
     if CORE.using_zephyr and len(full_config) > 1:
         raise cv.Invalid("Second i2c is not implemented on Zephyr yet")
@@ -281,7 +283,7 @@ FINAL_VALIDATE_SCHEMA = _final_validate
 
 
 @coroutine_with_priority(CoroPriority.BUS)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(i2c_ns.using)
     cg.add_define("USE_I2C")
     if CORE.is_esp32:
@@ -358,7 +360,7 @@ async def to_code(config):
             cg.add(var.set_lp_mode(bool(config[CONF_LOW_POWER_MODE])))
 
 
-def i2c_device_schema(default_address):
+def i2c_device_schema(default_address: int | None) -> cv.Schema:
     """Create a schema for a i2c device.
 
     :param default_address: The default address of the i2c device, can be None to represent
@@ -375,7 +377,7 @@ def i2c_device_schema(default_address):
     return cv.Schema(schema)
 
 
-async def register_i2c_device(var, config):
+async def register_i2c_device(var: MockObj, config: ConfigType) -> None:
     """Register an i2c device with the given config.
 
     Sets the i2c bus to use and the i2c address.
@@ -390,11 +392,11 @@ async def register_i2c_device(var, config):
 def final_validate_device_schema(
     name: str,
     *,
-    min_frequency: cv.frequency = None,
-    max_frequency: cv.frequency = None,
-    min_timeout: cv.time_period = None,
-    max_timeout: cv.time_period = None,
-):
+    min_frequency: Any = None,
+    max_frequency: Any = None,
+    min_timeout: Any = None,
+    max_timeout: Any = None,
+) -> cv.Schema:
     hub_schema = {}
     if (min_frequency is not None) and (max_frequency is not None):
         hub_schema[cv.Required(CONF_FREQUENCY)] = cv.Range(

esphome/components/infrared/infrared.cpp

@@ -75,8 +75,6 @@ void Infrared::dump_config() {
                 YESNO(this->traits_.get_supports_receiver()));
 }
 
-InfraredCall Infrared::make_call() { return InfraredCall(this); }
-
 void Infrared::control(const InfraredCall &call) {
   if (this->transmitter_ == nullptr) {
     ESP_LOGW(TAG, "No transmitter configured");

esphome/components/infrared/infrared.h

@@ -134,7 +134,7 @@ class Infrared : public Component, public EntityBase, public remote_base::Remote
   const InfraredTraits &get_traits() const { return this->traits_; }
 
   /// Create a call object for transmitting
-  InfraredCall make_call();
+  InfraredCall make_call() { return InfraredCall(this); }
 
   /// Get capability flags for this infrared instance
   uint32_t get_capability_flags() const;

esphome/components/libretiny/__init__.py

@@ -300,7 +300,7 @@ FRAMEWORK_SCHEMA = cv.All(
     _check_debug_order,
 )
 
-CONFIG_SCHEMA = cv.All(_notify_old_style)
+CONFIG_SCHEMA = cv.All(_notify_old_style, cv.require_platformio_toolchain("LibreTiny"))
 
 BASE_SCHEMA = cv.Schema(
     {
@@ -314,6 +314,7 @@ BASE_SCHEMA = cv.Schema(
 )
 
 BASE_SCHEMA.add_extra(_detect_variant)
+BASE_SCHEMA.add_extra(cv.require_platformio_toolchain("LibreTiny"))
 BASE_SCHEMA.add_extra(_update_core_data)
 
 

esphome/components/light/esp_range_view.cpp

@@ -13,8 +13,6 @@ ESPColorView ESPRangeView::operator[](int32_t index) const {
   index = interpret_index(index, this->size()) + this->begin_;
   return (*this->parent_)[index];
 }
-ESPRangeIterator ESPRangeView::begin() { return {*this, this->begin_}; }
-ESPRangeIterator ESPRangeView::end() { return {*this, this->end_}; }
 
 void ESPRangeView::set(const Color &color) {
   for (int32_t i = this->begin_; i < this->end_; i++) {

esphome/components/light/esp_range_view.h

@@ -75,4 +75,7 @@ class ESPRangeIterator {
   int32_t i_;
 };
 
+inline ESPRangeIterator ESPRangeView::begin() { return {*this, this->begin_}; }
+inline ESPRangeIterator ESPRangeView::end() { return {*this, this->end_}; }
+
 }  // namespace esphome::light

esphome/components/light/light_state.cpp

@@ -157,8 +157,6 @@ void LightState::loop() {
   }
 }
 
-float LightState::get_setup_priority() const { return setup_priority::HARDWARE - 1.0f; }
-
 void LightState::publish_state() {
   if (this->remote_values_listeners_) {
     for (auto *listener : *this->remote_values_listeners_) {
@@ -194,25 +192,11 @@ void LightState::add_target_state_reached_listener(LightTargetStateReachedListen
   this->target_state_reached_listeners_->push_back(listener);
 }
 
-void LightState::set_default_transition_length(uint32_t default_transition_length) {
-  this->default_transition_length_ = default_transition_length;
-}
-uint32_t LightState::get_default_transition_length() const { return this->default_transition_length_; }
-void LightState::set_flash_transition_length(uint32_t flash_transition_length) {
-  this->flash_transition_length_ = flash_transition_length;
-}
-uint32_t LightState::get_flash_transition_length() const { return this->flash_transition_length_; }
-void LightState::set_gamma_correct(float gamma_correct) { this->gamma_correct_ = gamma_correct; }
-void LightState::set_restore_mode(LightRestoreMode restore_mode) { this->restore_mode_ = restore_mode; }
-void LightState::set_initial_state(void (*callback)(LightStateRTCState &)) { this->initial_state_callback_ = callback; }
-bool LightState::supports_effects() { return !this->effects_.empty(); }
-const FixedVector<LightEffect *> &LightState::get_effects() const { return this->effects_; }
 void LightState::add_effects(const std::initializer_list<LightEffect *> &effects) {
   // Called once from Python codegen during setup with all effects from YAML config
   this->effects_ = effects;
 }
 
-void LightState::current_values_as_binary(bool *binary) { this->current_values.as_binary(binary); }
 void LightState::current_values_as_brightness(float *brightness) {
   this->current_values.as_brightness(brightness);
   *brightness = this->gamma_correct_lut(*brightness);
@@ -333,8 +317,6 @@ float LightState::gamma_uncorrect_lut(float value) const {
 }
 #endif  // USE_LIGHT_GAMMA_LUT
 
-bool LightState::is_transformer_active() { return this->is_transformer_active_; }
-
 void LightState::start_effect_(uint32_t effect_index) {
   this->stop_effect_();
   if (effect_index == 0)

esphome/components/light/light_state.h

@@ -109,7 +109,7 @@ class LightState : public EntityBase, public Component {
   void dump_config() override;
   void loop() override;
   /// Shortly after HARDWARE.
-  float get_setup_priority() const override;
+  float get_setup_priority() const override { return setup_priority::HARDWARE - 1.0f; }
 
   /** The current values of the light as outputted to the light.
    *
@@ -157,15 +157,19 @@ class LightState : public EntityBase, public Component {
   void add_target_state_reached_listener(LightTargetStateReachedListener *listener);
 
   /// Set the default transition length, i.e. the transition length when no transition is provided.
-  void set_default_transition_length(uint32_t default_transition_length);
-  uint32_t get_default_transition_length() const;
+  void set_default_transition_length(uint32_t default_transition_length) {
+    this->default_transition_length_ = default_transition_length;
+  }
+  uint32_t get_default_transition_length() const { return this->default_transition_length_; }
 
   /// Set the flash transition length
-  void set_flash_transition_length(uint32_t flash_transition_length);
-  uint32_t get_flash_transition_length() const;
+  void set_flash_transition_length(uint32_t flash_transition_length) {
+    this->flash_transition_length_ = flash_transition_length;
+  }
+  uint32_t get_flash_transition_length() const { return this->flash_transition_length_; }
 
   /// Set the gamma correction factor
-  void set_gamma_correct(float gamma_correct);
+  void set_gamma_correct(float gamma_correct) { this->gamma_correct_ = gamma_correct; }
   float get_gamma_correct() const { return this->gamma_correct_; }
 
 #ifdef USE_LIGHT_GAMMA_LUT
@@ -186,17 +190,17 @@ class LightState : public EntityBase, public Component {
 #endif  // USE_LIGHT_GAMMA_LUT
 
   /// Set the restore mode of this light
-  void set_restore_mode(LightRestoreMode restore_mode);
+  void set_restore_mode(LightRestoreMode restore_mode) { this->restore_mode_ = restore_mode; }
 
   /// Set a callback to populate the initial state defaults during setup.
   /// The callback is called once, then cleared. Values live in flash as code.
-  void set_initial_state(void (*callback)(LightStateRTCState &));
+  void set_initial_state(void (*callback)(LightStateRTCState &)) { this->initial_state_callback_ = callback; }
 
   /// Return whether the light has any effects that meet the trait requirements.
-  bool supports_effects();
+  bool supports_effects() const { return !this->effects_.empty(); }
 
   /// Get all effects for this light state.
-  const FixedVector<LightEffect *> &get_effects() const;
+  const FixedVector<LightEffect *> &get_effects() const { return this->effects_; }
 
   /// Add effects for this light state.
   void add_effects(const std::initializer_list<LightEffect *> &effects);
@@ -254,7 +258,7 @@ class LightState : public EntityBase, public Component {
   }
 
   /// The result of all the current_values_as_* methods have gamma correction applied.
-  void current_values_as_binary(bool *binary);
+  void current_values_as_binary(bool *binary) { this->current_values.as_binary(binary); }
 
   void current_values_as_brightness(float *brightness);
 
@@ -281,7 +285,7 @@ class LightState : public EntityBase, public Component {
    *   return;
    * }
    */
-  bool is_transformer_active();
+  bool is_transformer_active() const { return this->is_transformer_active_; }
 
  protected:
   friend LightOutput;

esphome/components/lock/__init__.py

@@ -12,13 +12,14 @@ from esphome.const import (
     CONF_ON_UNLOCK,
     CONF_WEB_SERVER,
 )
-from esphome.core import CORE, CoroPriority, coroutine_with_priority
+from esphome.core import CORE, ID, CoroPriority, coroutine_with_priority
 from esphome.core.entity_helpers import (
     entity_duplicate_validator,
     queue_entity_register,
     setup_entity,
 )
-from esphome.cpp_generator import MockObjClass
+from esphome.cpp_generator import MockObj, MockObjClass, TemplateArgsType
+from esphome.types import ConfigType, SafeExpType
 
 CODEOWNERS = ["@esphome/core"]
 IS_PLATFORM_COMPONENT = True
@@ -102,7 +103,7 @@ _CALLBACK_AUTOMATIONS = (
 
 
 @setup_entity("lock")
-async def _setup_lock_core(var, config):
+async def _setup_lock_core(var: MockObj, config: ConfigType) -> None:
     await automation.build_callback_automations(var, config, _CALLBACK_AUTOMATIONS)
 
     if mqtt_id := config.get(CONF_MQTT_ID):
@@ -113,7 +114,7 @@ async def _setup_lock_core(var, config):
         await web_server.add_entity_config(var, web_server_config)
 
 
-async def register_lock(var, config):
+async def register_lock(var: MockObj, config: ConfigType) -> None:
     if not CORE.has_id(config[CONF_ID]):
         var = cg.Pvariable(config[CONF_ID], var)
     queue_entity_register("lock", config)
@@ -121,7 +122,7 @@ async def register_lock(var, config):
     await _setup_lock_core(var, config)
 
 
-async def new_lock(config, *args):
+async def new_lock(config: ConfigType, *args: SafeExpType) -> MockObj:
     var = cg.new_Pvariable(config[CONF_ID], *args)
     await register_lock(var, config)
     return var
@@ -143,23 +144,38 @@ LOCK_ACTION_SCHEMA = maybe_simple_id(
 @automation.register_action(
     "lock.open", OpenAction, LOCK_ACTION_SCHEMA, synchronous=True
 )
-async def lock_action_to_code(config, action_id, template_arg, args):
+async def lock_action_to_code(
+    config: ConfigType,
+    action_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(action_id, template_arg, paren)
 
 
 @automation.register_condition("lock.is_locked", LockCondition, LOCK_ACTION_SCHEMA)
-async def lock_is_on_to_code(config, condition_id, template_arg, args):
+async def lock_is_on_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(condition_id, template_arg, paren, True)
 
 
 @automation.register_condition("lock.is_unlocked", LockCondition, LOCK_ACTION_SCHEMA)
-async def lock_is_off_to_code(config, condition_id, template_arg, args):
+async def lock_is_off_to_code(
+    config: ConfigType,
+    condition_id: ID,
+    template_arg: cg.TemplateArguments,
+    args: TemplateArgsType,
+) -> MockObj:
     paren = await cg.get_variable(config[CONF_ID])
     return cg.new_Pvariable(condition_id, template_arg, paren, False)
 
 
 @coroutine_with_priority(CoroPriority.CORE)
-async def to_code(config):
+async def to_code(config: ConfigType) -> None:
     cg.add_global(lock_ns.using)

esphome/components/logger/logger.cpp

@@ -201,17 +201,10 @@ void Logger::process_messages_() {
 #endif  // USE_ESPHOME_TASK_LOG_BUFFER
 }
 
-void Logger::set_baud_rate(uint32_t baud_rate) { this->baud_rate_ = baud_rate; }
 #ifdef USE_LOGGER_RUNTIME_TAG_LEVELS
 void Logger::set_log_level(const char *tag, uint8_t log_level) { this->log_levels_[tag] = log_level; }
 #endif
 
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
-UARTSelection Logger::get_uart() const { return this->uart_; }
-#endif
-
-float Logger::get_setup_priority() const { return setup_priority::BUS + 500.0f; }
-
 // Log level strings - packed into flash on ESP8266, indexed by log level (0-7)
 PROGMEM_STRING_TABLE(LogLevelStrings, "NONE", "ERROR", "WARN", "INFO", "CONFIG", "DEBUG", "VERBOSE", "VERY_VERBOSE");
 

esphome/components/logger/logger.h

@@ -148,7 +148,7 @@ class Logger final : public Component {
   void loop() override;
 #endif
   /// Manually set the baud rate for serial, set to 0 to disable.
-  void set_baud_rate(uint32_t baud_rate);
+  void set_baud_rate(uint32_t baud_rate) { this->baud_rate_ = baud_rate; }
   uint32_t get_baud_rate() const { return baud_rate_; }
 #if defined(USE_ARDUINO) && !defined(USE_ESP32)
   Stream *get_hw_serial() const { return hw_serial_; }
@@ -163,7 +163,7 @@ class Logger final : public Component {
 #if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
   void set_uart_selection(UARTSelection uart_selection) { uart_ = uart_selection; }
   /// Get the UART used by the logger.
-  UARTSelection get_uart() const;
+  UARTSelection get_uart() const { return this->uart_; }
 #endif
 
   /// Set the default log level for this logger.
@@ -197,7 +197,7 @@ class Logger final : public Component {
   void add_level_listener(LoggerLevelListener *listener) { this->level_listeners_.push_back(listener); }
 #endif
 
-  float get_setup_priority() const override;
+  float get_setup_priority() const override { return setup_priority::BUS + 500.0f; }
 
   void log_vprintf_(uint8_t level, const char *tag, int line, const char *format, va_list args);  // NOLINT
 #ifdef USE_STORE_LOG_STR_IN_FLASH

esphome/components/mitsubishi_cn105/__init__.py

@@ -8,6 +8,7 @@ from esphome.const import (
     CONF_ON_STATE,
     CONF_TEMPERATURE,
     CONF_UPDATE_INTERVAL,
+    CONF_USE_FAHRENHEIT,
 )
 from esphome.core import ID, Lambda
 from esphome.cpp_generator import LambdaExpression, MockObj
@@ -71,6 +72,7 @@ CONFIG_SCHEMA = (
             cv.Optional(
                 CONF_TELEMETRY_REQUEST_MIN_INTERVAL, default="60s"
             ): cv.update_interval,
+            cv.Optional(CONF_USE_FAHRENHEIT, default=False): cv.boolean,
             cv.Optional(CONF_VANE): cv.Schema(
                 {
                     cv.Optional(CONF_ON_STATE): automation.validate_automation({}),
@@ -114,6 +116,7 @@ async def to_code(config: ConfigType) -> None:
             config[CONF_TELEMETRY_REQUEST_MIN_INTERVAL]
         )
     )
+    cg.add(var.set_use_fahrenheit(config[CONF_USE_FAHRENHEIT]))
     if on_state := config.get(CONF_VANE, {}).get(CONF_ON_STATE):
         cg.add_global(mitsubishi_ns.using)
         for conf in on_state:

esphome/components/mitsubishi_cn105/mitsubishi_cn105.h

@@ -83,6 +83,7 @@ class MitsubishiCN105 {
     return this->is_telemetry_polling_enabled() ? !std::isnan(this->status_.room_temperature)
                                                 : !std::isnan(this->status_.target_temperature);
   }
+  bool is_temperature_encoding_b() const { return this->property_context_.use_temperature_encoding_b; }
 
   void set_power(bool power_on);
   void set_target_temperature(float target_temperature);

esphome/components/mitsubishi_cn105/mitsubishi_cn105_climate.cpp

@@ -50,7 +50,11 @@ static constexpr std::optional<Left> reverse_map_lookup(const std::array<std::pa
   return key.has_value() ? reverse_map_lookup(map, *key) : std::nullopt;
 }
 
-void MitsubishiCN105Climate::dump_config() { LOG_CLIMATE("", "Mitsubishi CN105 Climate", this); }
+void MitsubishiCN105Climate::dump_config() {
+  LOG_CLIMATE("", "Mitsubishi CN105 Climate", this);
+  ESP_LOGCONFIG(TAG, "  Temperature unit: °%c",
+                this->parent_->get_temperature_mapping().get_use_fahrenheit() ? 'F' : 'C');
+}
 
 void MitsubishiCN105Climate::setup() {
   this->parent_->add_on_status_callback([this]() { this->apply_values_(); });
@@ -72,13 +76,15 @@ climate::ClimateTraits MitsubishiCN105Climate::traits() {
 
   traits.set_supported_swing_modes(this->supported_swing_modes_);
 
-  traits.set_visual_min_temperature(16.0f);
-  traits.set_visual_max_temperature(31.0f);
+  const bool use_fahrenheit = this->parent_->get_temperature_mapping().get_use_fahrenheit();
+  traits.set_temperature_unit(use_fahrenheit ? TemperatureUnit::FAHRENHEIT : TemperatureUnit::CELSIUS);
+  traits.set_visual_min_temperature(use_fahrenheit ? 61.0f : 16.0f);
+  traits.set_visual_max_temperature(use_fahrenheit ? 88.0f : 31.0f);
   traits.set_visual_temperature_step(1.0f);
 
   if (this->parent_->is_telemetry_polling_enabled()) {
     traits.add_feature_flags(climate::CLIMATE_SUPPORTS_CURRENT_TEMPERATURE);
-    traits.set_visual_current_temperature_step(0.5f);
+    traits.set_visual_current_temperature_step(use_fahrenheit ? 1.0f : 0.5f);
   }
 
   return traits;
@@ -86,7 +92,7 @@ climate::ClimateTraits MitsubishiCN105Climate::traits() {
 
 void MitsubishiCN105Climate::control(const climate::ClimateCall &call) {
   if (const auto target_temperature = call.get_target_temperature()) {
-    this->parent_->set_target_temperature(*target_temperature);
+    this->parent_->set_target_temperature(this->parent_->get_temperature_mapping().to_mitsubishi(*target_temperature));
   }
 
   if (const auto mode = call.get_mode()) {
@@ -139,10 +145,10 @@ void MitsubishiCN105Climate::control(const climate::ClimateCall &call) {
 void MitsubishiCN105Climate::apply_values_() {
   const auto &status = this->parent_->status();
 
-  this->target_temperature = status.target_temperature;
+  this->target_temperature = this->parent_->get_temperature_mapping().from_mitsubishi(status.target_temperature);
 
   if (this->parent_->is_telemetry_polling_enabled()) {
-    this->current_temperature = status.room_temperature;
+    this->current_temperature = this->parent_->get_temperature_mapping().from_mitsubishi(status.room_temperature);
   }
 
   if (status.power_on) {

esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.cpp

@@ -27,6 +27,13 @@ void MitsubishiCN105Component::setup() { this->hp_.initialize(); }
 
 void MitsubishiCN105Component::loop() {
   if (this->hp_.update()) {
+    // Encoding A only supports whole °C values and cannot represent native °F setpoints accurately.
+    // See https://github.com/esphome/esphome/pull/15488#issuecomment-5268304343
+    if (this->temperature_mapping_.get_use_fahrenheit() && !this->hp_.is_temperature_encoding_b()) {
+      ESP_LOGE(TAG, "Unit reports encoding A, which cannot accurately convert °F setpoints; disable 'use_fahrenheit'");
+      this->mark_failed();
+      return;
+    }
     this->notify_status_listeners_();
   }
 }

esphome/components/mitsubishi_cn105/mitsubishi_cn105_component.h

@@ -3,13 +3,43 @@
 #include "mitsubishi_cn105.h"
 
 #include "esphome/core/component.h"
+#include "esphome/core/helpers.h"
 #include "esphome/components/uart/uart.h"
 
-#include <utility>
+#include <algorithm>
+#include <cmath>
 #include <optional>
+#include <utility>
 
 namespace esphome::mitsubishi_cn105 {
 
+struct TemperatureMapping {
+  float to_mitsubishi(float value) const {
+    if (!this->use_fahrenheit_) {
+      return value;
+    }
+    const int fahrenheit = std::clamp(static_cast<int>(std::round(value)), 61, 88);
+    return 0.5f * (fahrenheit - 28 + (fahrenheit > 68) - (fahrenheit < 68));
+  }
+
+  float from_mitsubishi(float value) const {
+    if (!this->use_fahrenheit_) {
+      return value;
+    }
+    if (value < 16.0f || value > 30.5f) {
+      return celsius_to_fahrenheit(value);
+    }
+    const int mitsubishi_half_degrees = static_cast<int>(std::round(value * 2.0f));
+    return mitsubishi_half_degrees + 29 - (mitsubishi_half_degrees >= 40) - (mitsubishi_half_degrees > 40);
+  }
+
+  bool get_use_fahrenheit() const { return this->use_fahrenheit_; }
+  void set_use_fahrenheit(bool value) { this->use_fahrenheit_ = value; }
+
+ protected:
+  bool use_fahrenheit_{false};
+};
+
 enum VerticalVaneMode : uint8_t {
   VERTICAL_VANE_MODE_AUTO = static_cast<uint8_t>(MitsubishiCN105::VaneMode::AUTO),
   VERTICAL_VANE_MODE_POSITION_1 = static_cast<uint8_t>(MitsubishiCN105::VaneMode::POSITION_1),
@@ -60,6 +90,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
 
   void set_update_interval(uint32_t ms) { this->hp_.set_update_interval(ms); }
   void set_telemetry_request_min_interval(uint32_t ms) { this->hp_.set_telemetry_request_min_interval(ms); }
+  void set_use_fahrenheit(bool value) { this->temperature_mapping_.set_use_fahrenheit(value); }
 
   void set_remote_temperature(float temperature) { this->hp_.set_remote_temperature(temperature); }
   void clear_remote_temperature() { this->hp_.clear_remote_temperature(); }
@@ -75,6 +106,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
   const MitsubishiCN105::Status &status() const { return this->hp_.status(); }
   bool is_status_initialized() const { return this->hp_.is_status_initialized(); }
   bool is_telemetry_polling_enabled() const { return this->hp_.is_telemetry_polling_enabled(); }
+  const TemperatureMapping &get_temperature_mapping() const { return this->temperature_mapping_; }
 
   template<typename F> void add_on_status_callback(F &&callback) {
     this->status_callback_.add(std::forward<F>(callback));
@@ -99,6 +131,7 @@ class MitsubishiCN105Component : public Component, public uart::UARTDevice {
   }
 
   MitsubishiCN105 hp_;
+  TemperatureMapping temperature_mapping_;
   CallbackManager<void()> status_callback_;
   LazyCallbackManager<void(const VaneState &)> vane_state_callback_;
 };

esphome/components/mqtt/mqtt_client.cpp

@@ -668,9 +668,7 @@ void MQTTClientComponent::on_message(const std::string &topic, const std::string
 // Setters
 void MQTTClientComponent::disable_log_message() { this->log_message_.topic = ""; }
 bool MQTTClientComponent::is_log_message_enabled() const { return !this->log_message_.topic.empty(); }
-void MQTTClientComponent::set_reboot_timeout(uint32_t reboot_timeout) { this->reboot_timeout_ = reboot_timeout; }
 void MQTTClientComponent::register_mqtt_component(MQTTComponent *component) { this->children_.push_back(component); }
-void MQTTClientComponent::set_log_level(int level) { this->log_level_ = level; }
 void MQTTClientComponent::set_keep_alive(uint16_t keep_alive_s) { this->mqtt_backend_.set_keep_alive(keep_alive_s); }
 void MQTTClientComponent::set_log_message_template(MQTTMessage &&message) { this->log_message_ = std::move(message); }
 const MQTTDiscoveryInfo &MQTTClientComponent::get_discovery_info() const { return this->discovery_info_; }
@@ -683,10 +681,6 @@ void MQTTClientComponent::set_topic_prefix(const std::string &topic_prefix, cons
   }
 }
 const std::string &MQTTClientComponent::get_topic_prefix() const { return this->topic_prefix_; }
-void MQTTClientComponent::set_publish_nan_as_none(bool publish_nan_as_none) {
-  this->publish_nan_as_none_ = publish_nan_as_none;
-}
-bool MQTTClientComponent::is_publish_nan_as_none() const { return this->publish_nan_as_none_; }
 void MQTTClientComponent::disable_birth_message() {
   this->birth_message_.topic = "";
   this->recalculate_availability_();
@@ -766,8 +760,6 @@ MQTTClientComponent *global_mqtt_client = nullptr;  // NOLINT(cppcoreguidelines-
 
 // MQTTMessageTrigger
 MQTTMessageTrigger::MQTTMessageTrigger(std::string topic) : topic_(std::move(topic)) {}
-void MQTTMessageTrigger::set_qos(uint8_t qos) { this->qos_ = qos; }
-void MQTTMessageTrigger::set_payload(const std::string &payload) { this->payload_ = payload; }
 void MQTTMessageTrigger::setup() {
   global_mqtt_client->subscribe(
       this->topic_,

esphome/components/mqtt/mqtt_client.h

@@ -159,7 +159,7 @@ class MQTTClientComponent final : public Component {
 
   /// Manually set the topic used for logging.
   void set_log_message_template(MQTTMessage &&message);
-  void set_log_level(int level);
+  void set_log_level(int level) { this->log_level_ = level; }
   /// Get the topic used for logging. Defaults to "<topic_prefix>/debug" and the value is cached for speed.
   void disable_log_message();
   bool is_log_message_enabled() const;
@@ -241,7 +241,7 @@ class MQTTClientComponent final : public Component {
 
   void check_connected();
 
-  void set_reboot_timeout(uint32_t reboot_timeout);
+  void set_reboot_timeout(uint32_t reboot_timeout) { this->reboot_timeout_ = reboot_timeout; }
 
   void register_mqtt_component(MQTTComponent *component);
 
@@ -262,8 +262,8 @@ class MQTTClientComponent final : public Component {
   void set_on_disconnect(mqtt_on_disconnect_callback_t &&callback);
 
   // Publish None state instead of NaN for Home Assistant
-  void set_publish_nan_as_none(bool publish_nan_as_none);
-  bool is_publish_nan_as_none() const;
+  void set_publish_nan_as_none(bool publish_nan_as_none) { this->publish_nan_as_none_ = publish_nan_as_none; }
+  bool is_publish_nan_as_none() const { return this->publish_nan_as_none_; }
 
   void set_wait_for_connection(bool wait_for_connection) { this->wait_for_connection_ = wait_for_connection; }
 
@@ -344,8 +344,8 @@ class MQTTMessageTrigger final : public Trigger<std::string>, public Component {
  public:
   explicit MQTTMessageTrigger(std::string topic);
 
-  void set_qos(uint8_t qos);
-  void set_payload(const std::string &payload);
+  void set_qos(uint8_t qos) { this->qos_ = qos; }
+  void set_payload(const std::string &payload) { this->payload_ = payload; }
   void setup() override;
   void dump_config() override;
   float get_setup_priority() const override;

esphome/components/mqtt/mqtt_climate.cpp

@@ -118,8 +118,7 @@ void MQTTClimateComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryCo
   root[MQTT_TARGET_TEMPERATURE_STEP] = roundf(traits.get_visual_target_temperature_step() * 10) * 0.1f;
   // current_temp_step
   root[MQTT_CURRENT_TEMPERATURE_STEP] = roundf(traits.get_visual_current_temperature_step() * 10) * 0.1f;
-  // temperature units are always coerced to Celsius internally
-  root[MQTT_TEMPERATURE_UNIT] = "C";
+  root[MQTT_TEMPERATURE_UNIT] = traits.get_temperature_unit() == TemperatureUnit::FAHRENHEIT ? "F" : "C";
 
   // min_humidity
   root[MQTT_MIN_HUMIDITY] = traits.get_visual_min_humidity();

esphome/components/mqtt/mqtt_component.cpp

@@ -340,10 +340,6 @@ bool MQTTComponent::send_discovery_() {
   // NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
-uint8_t MQTTComponent::get_qos() const { return this->qos_; }
-
-bool MQTTComponent::get_retain() const { return this->retain_; }
-
 bool MQTTComponent::is_discovery_enabled() const {
   return this->discovery_enabled_ && global_mqtt_client->is_discovery_enabled();
 }

esphome/components/mqtt/mqtt_component.h

@@ -108,11 +108,11 @@ class MQTTComponent : public Component {
 
   /// Set QOS for state messages.
   void set_qos(uint8_t qos);
-  uint8_t get_qos() const;
+  uint8_t get_qos() const { return this->qos_; }
 
   /// Set whether state message should be retained.
   void set_retain(bool retain);
-  bool get_retain() const;
+  bool get_retain() const { return this->retain_; }
 
   /// Disable discovery. Sets friendly name to "".
   void disable_discovery();

esphome/components/mqtt/mqtt_sensor.cpp

@@ -39,8 +39,6 @@ uint32_t MQTTSensorComponent::get_expire_after() const {
     return *this->expire_after_;
   return 0;
 }
-void MQTTSensorComponent::set_expire_after(uint32_t expire_after) { this->expire_after_ = expire_after; }
-void MQTTSensorComponent::disable_expire_after() { this->expire_after_ = 0; }
 
 void MQTTSensorComponent::send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) {
   // NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson

esphome/components/mqtt/mqtt_sensor.h

@@ -22,9 +22,9 @@ class MQTTSensorComponent final : public mqtt::MQTTComponent {
   explicit MQTTSensorComponent(sensor::Sensor *sensor);
 
   /// Setup an expiry, 0 disables it
-  void set_expire_after(uint32_t expire_after);
+  void set_expire_after(uint32_t expire_after) { this->expire_after_ = expire_after; }
   /// Disable Home Assistant value expiry.
-  void disable_expire_after();
+  void disable_expire_after() { this->expire_after_ = 0; }
 
   void send_discovery(JsonObject root, mqtt::SendDiscoveryConfig &config) override;