Merge remote-tracking branch 'origin/logger-simplify' into HEAD

Merge remote-tracking branch 'origin/dev' into HEAD
Merge remote-tracking branch 'origin/logger-simplify' into logger-console-api
2026-11-15 01:25:57 +00:00 · 2026-11-14 08:39:56 -06:00 · 2026-11-14 08:36:37 -06:00 · 2026-11-12 13:35:53 -06:00 · 2026-11-12 13:35:46 -06:00 · 2026-11-12 09:00:02 -06:00
39 changed files with 647 additions and 1340 deletions
@@ -37,6 +37,7 @@ from esphome.types import ConfigType
 _LOGGER = logging.getLogger(__name__)

 CODEOWNERS = ["@esphome/core"]
+DOMAIN = "logger"
 logger_ns = cg.esphome_ns.namespace("logger")
 LOG_LEVELS = {
    "NONE": cg.global_ns.ESPHOME_LOG_LEVEL_NONE,
@@ -93,6 +94,7 @@ UART_SELECTION_RP2040 = [USB_CDC, UART0, UART1]

 UART_SELECTION_NRF52 = [USB_CDC, UART0]

+# Read by device-builder
 HARDWARE_UART_TO_UART_SELECTION = {
    UART0: logger_ns.UART_SELECTION_UART0,
    UART0_SWAP: logger_ns.UART_SELECTION_UART0_SWAP,
@@ -108,8 +110,6 @@ HARDWARE_UART_TO_SERIAL = {
        UART0: cg.global_ns.Serial,
        UART0_SWAP: cg.global_ns.Serial,
        UART1: cg.global_ns.Serial1,
-        UART2: cg.global_ns.Serial2,
-        DEFAULT: cg.global_ns.Serial,
    },
    PLATFORM_RP2: {
        UART0: cg.global_ns.Serial1,
@@ -503,13 +503,10 @@ async def to_code(config: ConfigType) -> None:
    CORE.data.setdefault(DOMAIN, {})[CONF_LEVEL] = level
    tx_buffer_size = config[CONF_TX_BUFFER_SIZE]
    cg.add_define("ESPHOME_LOGGER_TX_BUFFER_SIZE", tx_buffer_size)
-    # Determine task log buffer size. The buffer is a direct member of Logger
-    # (no separate heap allocation).
-    task_log_buffer_size = 0
-    if CORE.is_esp32 or CORE.is_libretiny or CORE.is_nrf52:
-        task_log_buffer_size = config[CONF_TASK_LOG_BUFFER_SIZE]
-    elif CORE.is_host:
-        task_log_buffer_size = 64  # Fixed 64 slots for host
+    # The host has a fixed 64 slots
+    task_log_buffer_size = (
+        64 if CORE.is_host else config.get(CONF_TASK_LOG_BUFFER_SIZE, 0)
+    )
    if task_log_buffer_size > 0:
        cg.add_define("USE_ESPHOME_TASK_LOG_BUFFER")
        cg.add_define("ESPHOME_TASK_LOG_BUFFER_SIZE", task_log_buffer_size)
@@ -542,17 +539,17 @@ async def to_code(config: ConfigType) -> None:
                cg.add(log.set_boot_log_level(tag, LOG_LEVELS[log_level]))
    if CORE.is_esp32 or CORE.is_host:
        cg.add(log.create_pthread_key())
-    # set_uart_selection() must be called before pre_setup() because
-    # pre_setup() switches on uart_ to decide which hardware to initialize
-    # (e.g. UART0 vs USB_SERIAL_JTAG). Without this, uart_ is still the
-    # default UART_SELECTION_UART0 and the wrong hardware gets initialized.
-    # uart_ is UART0 in C++ except on LibreTiny where it is DEFAULT; skip the
-    # setter when the config matches it.
-    cpp_default_uart = DEFAULT if CORE.is_libretiny else UART0
-    if (
-        hardware_uart := config.get(CONF_HARDWARE_UART)
-    ) is not None and hardware_uart != cpp_default_uart:
-        cg.add(log.set_uart_selection(HARDWARE_UART_TO_UART_SELECTION[hardware_uart]))
+    if (hardware_uart := config.get(CONF_HARDWARE_UART)) is not None:
+        cg.add_define(f"USE_LOGGER_UART_SELECTION_{hardware_uart}")
+        cg.add_define(
+            "ESPHOME_LOGGER_UART_SELECTION",
+            cg.RawExpression(f"logger::UART_SELECTION_{hardware_uart}"),
+        )
+        # ESP8266 without serial logging never opens a port
+        cg.add_define(
+            "ESPHOME_LOGGER_UART_NAME",
+            "NONE" if CORE.is_esp8266 and baud_rate == 0 else hardware_uart,
+        )
    # pre_setup() sets global_logger and must run before any other code
    # that may call ESP_LOG* (e.g. setup_preferences contains ESP_LOGVV).
    cg.add(log.pre_setup())
@@ -647,10 +644,8 @@ async def _late_logger_init(config: ConfigType) -> None:

        if config[CONF_HARDWARE_UART] == USB_CDC:
            add_idf_sdkconfig_option("CONFIG_ESP_CONSOLE_USB_CDC", True)
-            cg.add_define("USE_LOGGER_UART_SELECTION_USB_CDC")
        elif config[CONF_HARDWARE_UART] == USB_SERIAL_JTAG:
            add_idf_sdkconfig_option("CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG", True)
-            cg.add_define("USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG")
        # Log V2 formats centrally in esp_log() (~4KB flash, ~180B RAM). 6.1
        # adds CONSTRAINED_ENV_SAFE=n, keeping early/DRAM logs on
        # esp_rom_printf instead of pulling ~1.2KB esp_rom_vprintf into IRAM.
@@ -667,8 +662,13 @@ async def _late_logger_init(config: ConfigType) -> None:
            cg.add_define("USE_ESP32_LOG_V2")
            # --wrap: a strong definition collides; see logger_esp32.cpp
            cg.add_build_flag("-Wl,--wrap=esp_log_format")
-    if CORE.is_rp2 and config[CONF_HARDWARE_UART] == USB_CDC:
-        cg.add_define("USE_LOGGER_UART_SELECTION_USB_CDC")
+    # Zephyr polls the USB port only when it logs there
+    if (
+        CORE.using_zephyr
+        and has_serial_logging
+        and config[CONF_HARDWARE_UART] == USB_CDC
+    ):
+        cg.add_define("USE_LOGGER_ZEPHYR_CDC_LOOP")
    # Define platform support flags for components that need auto-detection
    try:
        uart_selection(USB_SERIAL_JTAG)
@@ -718,7 +718,6 @@ async def _late_logger_init(config: ConfigType) -> None:
            if config[CONF_HARDWARE_UART] == UART1:
                zephyr_add_overlay("""&uart1 { status = "okay";};""")
            if config[CONF_HARDWARE_UART] == USB_CDC:
-                cg.add_define("USE_LOGGER_UART_SELECTION_USB_CDC")
                zephyr_add_prj_conf("UART_LINE_CTRL", True)

    # Register at end for safe mode
@@ -739,8 +738,6 @@ async def _late_logger_init(config: ConfigType) -> None:
            conf,
        )

-    CORE.add_job(final_step)
-

 def validate_printf(value: ConfigType) -> ConfigType:
    # https://stackoverflow.com/questions/30011379/how-can-i-parse-a-c-format-string-in-python
@@ -875,11 +872,6 @@ FILTER_SOURCE_FILES = filter_source_files_from_platform(
    }
 )

-# Keys for CORE.data storage
-DOMAIN = "logger"
-KEY_LEVEL_LISTENERS = "level_listeners"
-KEY_LOG_LISTENERS = "log_listeners"
-

 def request_logger_level_listeners() -> None:
    """Request that logger level listeners be compiled in.
@@ -888,29 +880,18 @@ def request_logger_level_listeners() -> None:
    function during their code generation. This enables the add_level_listener()
    method and compiles in the listener vector.
    """
-    CORE.data.setdefault(DOMAIN, {})[KEY_LEVEL_LISTENERS] = True
+    cg.add_define("USE_LOGGER_LEVEL_LISTENERS")
+
+
+_request_log_listener_slot = cg.slot_counter("ESPHOME_LOG_MAX_LISTENERS")
+
+
+def request_console() -> None:
+    """Compile in Logger::console_read() and console_write(); call from to_code."""
+    cg.add_define("USE_LOGGER_CONSOLE")


 def request_log_listener() -> None:
-    """Request a log listener slot.
-
-    Components that need to receive log messages should call this function
-    during their code generation. This increments the listener count used
-    to size the StaticVector.
-    """
-    data = CORE.data.setdefault(DOMAIN, {})
-    data[KEY_LOG_LISTENERS] = data.get(KEY_LOG_LISTENERS, 0) + 1
-
-
-@coroutine_with_priority(CoroPriority.FINAL)
-async def final_step() -> None:
-    """Final code generation step to configure optional logger features."""
-    domain_data = CORE.data.get(DOMAIN, {})
-    if domain_data.get(KEY_LEVEL_LISTENERS, False):
-        cg.add_define("USE_LOGGER_LEVEL_LISTENERS")
-
-    # Only generate log listener code if any component needs it
-    log_listener_count = domain_data.get(KEY_LOG_LISTENERS, 0)
-    if log_listener_count > 0:
-        cg.add_define("USE_LOG_LISTENERS")
-        cg.add_define("ESPHOME_LOG_MAX_LISTENERS", log_listener_count)
+    """Reserve a log listener slot; call once per listener from to_code."""
+    cg.add_define("USE_LOG_LISTENERS")
+    _request_log_listener_slot()
@@ -32,7 +32,7 @@ void HOT Logger::log_vprintf_(uint8_t level, const char *tag, int line, const ch
  // Get task handle once - used for both main task check and passing to non-main thread handler
  TaskHandle_t current_task = xTaskGetCurrentTaskHandle();
  const bool is_main_task = (current_task == this->main_task_);
-#elif (USE_ZEPHYR)
+#elif defined(USE_ZEPHYR)
  k_tid_t current_task = k_current_get();
  const bool is_main_task = (current_task == this->main_task_);
 #else  // USE_HOST
@@ -57,10 +57,10 @@ void HOT Logger::log_vprintf_(uint8_t level, const char *tag, int line, const ch
  // (we already have the handle from the main task check above).
  // Host: pass a stack buffer for pthread_getname_np to write into.
 #if defined(USE_ESP32) || defined(USE_LIBRETINY)
-  const char *thread_name = get_thread_name_(current_task);
+  const char *thread_name = this->get_thread_name_(current_task);
 #elif defined(USE_ZEPHYR)
  char thread_name_buf[MAX_POINTER_REPRESENTATION];
-  const char *thread_name = get_thread_name_(thread_name_buf, current_task);
+  const char *thread_name = this->get_thread_name_(thread_name_buf, current_task);
 #else  // USE_HOST
  char thread_name_buf[THREAD_NAME_BUF_SIZE];
  const char *thread_name = this->get_thread_name_(thread_name_buf);
@@ -103,10 +103,10 @@ void Logger::log_vprintf_non_main_thread_(uint8_t level, const char *tag, int li
  {
 #ifdef USE_HOST
    // Host always has console output - no baud_rate check needed
-    static const size_t MAX_CONSOLE_LOG_MSG_SIZE = 512;
+    static constexpr size_t MAX_CONSOLE_LOG_MSG_SIZE = 512;
 #else
    // Maximum size for console log messages (includes null terminator)
-    static const size_t MAX_CONSOLE_LOG_MSG_SIZE = 144;
+    static constexpr size_t MAX_CONSOLE_LOG_MSG_SIZE = 144;
 #endif
    char console_buffer[MAX_CONSOLE_LOG_MSG_SIZE];  // MUST be stack allocated for thread safety
    LogBuffer buf{console_buffer, MAX_CONSOLE_LOG_MSG_SIZE};
@@ -118,13 +118,11 @@ void Logger::log_vprintf_non_main_thread_(uint8_t level, const char *tag, int li
 }
 #else
 // Implementation for single-task platforms (ESP8266, RP2040)
-// Logging calls are NOT thread-safe: global_recursion_guard_ is a plain bool and tx_buffer_ has no locking.
-// Not a problem in practice yet since Zephyr has no API support (logs are console-only).
+// Logging calls are NOT thread-safe: the recursion guard is a plain bool and tx_buffer_ has no locking.
 void HOT Logger::log_vprintf_(uint8_t level, const char *tag, int line, const char *format, va_list args) {  // NOLINT
-  if (level > this->level_for(tag) || global_recursion_guard_)
+  if (level > this->level_for(tag) || this->main_task_recursion_guard_)
    return;
-  // Other single-task platforms don't have thread names, so pass nullptr
-  this->log_message_to_buffer_and_send_(global_recursion_guard_, level, tag, line, format, args, nullptr);
+  this->log_message_to_buffer_and_send_(this->main_task_recursion_guard_, level, tag, line, format, args, nullptr);
 }
 #endif  // USE_ESP32 || USE_HOST || USE_LIBRETINY || USE_ZEPHYR

@@ -136,10 +134,10 @@ void HOT Logger::log_vprintf_(uint8_t level, const char *tag, int line, const ch
 //
 void Logger::log_vprintf_(uint8_t level, const char *tag, int line, const __FlashStringHelper *format,
                          va_list args) {  // NOLINT
-  if (level > this->level_for(tag) || global_recursion_guard_)
+  if (level > this->level_for(tag) || this->main_task_recursion_guard_)
    return;

-  this->log_message_to_buffer_and_send_(global_recursion_guard_, level, tag, line, format, args, nullptr);
+  this->log_message_to_buffer_and_send_(this->main_task_recursion_guard_, level, tag, line, format, args, nullptr);
 }
 #endif  // USE_ESP8266

@@ -184,10 +182,10 @@ Logger::Logger(uint32_t baud_rate) : baud_rate_(baud_rate) {
 #endif
 }

-#if defined(USE_ESPHOME_TASK_LOG_BUFFER) || (defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC))
+#if defined(USE_ESPHOME_TASK_LOG_BUFFER) || defined(USE_LOGGER_ZEPHYR_CDC_LOOP)
 void Logger::loop() {
  this->process_messages_();
-#if defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+#ifdef USE_LOGGER_ZEPHYR_CDC_LOOP
  this->cdc_loop_();
 #endif
 }
@@ -213,11 +211,11 @@ void Logger::process_messages_() {
      this->write_log_buffer_to_console_(buf);
    }
  }
-#if !(defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC))
+  // Zephyr with USB CDC keeps the loop running for cdc_loop_()
+#ifndef USE_LOGGER_ZEPHYR_CDC_LOOP
  else {
-    // No messages to process, disable loop if appropriate
-    // This reduces overhead when there's no async logging activity
-    this->disable_loop_when_buffer_empty_();
+    // A concurrent enable_loop_soon_any_context() still wakes the next iteration
+    this->disable_loop();
  }
 #endif
 #endif  // USE_ESPHOME_TASK_LOG_BUFFER
@@ -265,7 +263,7 @@ void Logger::boot_log_capture_(uint8_t level, const char *tag, const LogBuffer &

 void Logger::replay_boot_logs() {
  // The replay shares tx_buffer_ with normal logging, so it is dropped like any other re-entrant log
-  bool &recursion_guard = this->main_loop_recursion_guard_();
+  bool &recursion_guard = this->main_task_recursion_guard_;
  if (recursion_guard)
    return;
  this->boot_log_done_ = true;  // Stops capture first, so the replay output is not buffered again
@@ -307,6 +305,25 @@ static const LogString *get_log_level_str(uint8_t level) {
  return LogLevelStrings::get_log_str(level, LogLevelStrings::LAST_INDEX);
 }

+#ifndef USE_HOST
+const LogString *Logger::get_uart_selection_() {
+#ifdef USE_LOGGER_UART_SELECTION_DEFAULT
+  // LibreTiny resolves DEFAULT to the board's port only when serial logging is on
+  if (this->baud_rate_ > 0) {
+    switch (this->get_uart()) {
+      case UART_SELECTION_UART0:
+        return LOG_STR("UART0");
+      case UART_SELECTION_UART1:
+        return LOG_STR("UART1");
+      default:
+        return LOG_STR("UART2");
+    }
+  }
+#endif
+  return LOG_STR(ESPHOME_LOGGER_UART_NAME);
+}
+#endif
+
 void Logger::dump_config() {
  ESP_LOGCONFIG(TAG,
                "Logger:\n"
@@ -342,7 +359,7 @@ void Logger::dump_config() {
  }
 #endif
 #ifdef USE_ZEPHYR
-  dump_crash_();
+  this->dump_crash_();
 #ifdef USE_BOOTLOADER_ADAFRUIT
  this->dump_bootloader_();
 #endif
@@ -42,9 +42,6 @@ struct device;
 namespace esphome::logger {

 /** Lightweight callback for receiving log messages without virtual dispatch overhead.
- *
- * Replaces the former LogListener virtual interface to eliminate per-implementer
- * vtable sub-tables and thunk code (~39 bytes saved per class that used LogListener).
 *
 * Usage:
 *   // In your component's setup():
@@ -73,7 +70,7 @@ struct LogCallback {
 *    public:
 *     void setup() override {
 *       if (logger::global_logger != nullptr)
- *         logger::global_logger->add_logger_level_listener(this);
+ *         logger::global_logger->add_level_listener(this);
 *     }
 *     void on_log_level_change(uint8_t level) override {
 *       // Handle log level change
@@ -127,6 +124,9 @@ enum UARTSelection : uint8_t {
  UART_SELECTION_UART0_SWAP,
 #endif  // USE_ESP8266
 };
+
+// The port chosen by hardware_uart, fixed at build time
+static constexpr UARTSelection CONFIGURED_UART_SELECTION = ESPHOME_LOGGER_UART_SELECTION;
 #endif  // USE_ESP32 || USE_ESP8266 || USE_RP2 || USE_LIBRETINY || USE_ZEPHYR

 /**
@@ -138,7 +138,7 @@ enum UARTSelection : uint8_t {
 * - On ESP32: Uses task-specific recursion guards
 *   * Main task: Uses a dedicated boolean member variable for efficiency
 *   * Other tasks: Uses pthread TLS with a dynamically allocated key for task-specific state
- * - On other platforms: Uses a simple global recursion guard
+ * - On single-task platforms: Uses the main task guard alone
 *
 * We use pthread TLS via pthread_key_create to create a unique key for storing
 * task-specific recursion state, which:
@@ -149,7 +149,7 @@ enum UARTSelection : uint8_t {
 class Logger final : public Component {
 public:
  explicit Logger(uint32_t baud_rate);
-#if defined(USE_ESPHOME_TASK_LOG_BUFFER) || (defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC))
+#if defined(USE_ESPHOME_TASK_LOG_BUFFER) || defined(USE_LOGGER_ZEPHYR_CDC_LOOP)
  void loop() override;
 #endif
 #if defined(USE_RP2_CRASH_HANDLER) && defined(USE_LOGGER_UART_SELECTION_USB_CDC)
@@ -157,21 +157,52 @@ class Logger final : public Component {
 #endif
  /// Manually set the baud rate for serial, set to 0 to disable.
  void set_baud_rate(uint32_t baud_rate) { this->baud_rate_ = baud_rate; }
-  uint32_t get_baud_rate() const { return baud_rate_; }
+  uint32_t get_baud_rate() const { return this->baud_rate_; }
 #if defined(USE_ARDUINO) && !defined(USE_ESP32)
-  Stream *get_hw_serial() const { return hw_serial_; }
+  Stream *get_hw_serial() const { return this->hw_serial_; }
 #endif
 #ifdef USE_ESP32
-  uart_port_t get_uart_num() const { return uart_num_; }
-  void create_pthread_key() { pthread_key_create(&log_recursion_key_, nullptr); }
+  /// UART_NUM_0 when logging to USB
+  constexpr uart_port_t get_uart_num() const {
+#if defined(USE_LOGGER_UART_SELECTION_USB_CDC) || defined(USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG)
+    return UART_NUM_0;
+#else
+    return static_cast<uart_port_t>(CONFIGURED_UART_SELECTION);
 #endif
-#ifdef USE_HOST
-  void create_pthread_key() { pthread_key_create(&log_recursion_key_, nullptr); }
+  }
+#endif
+#if defined(USE_ESP32) || defined(USE_HOST)
+  void create_pthread_key() { pthread_key_create(&this->log_recursion_key_, nullptr); }
 #endif
 #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 { return this->uart_; }
+#ifdef USE_LIBRETINY
+  // DEFAULT resolves to the board's default port
+  constexpr UARTSelection get_uart() const {
+    return CONFIGURED_UART_SELECTION == UART_SELECTION_DEFAULT ? static_cast<UARTSelection>(LT_UART_DEFAULT_SERIAL + 1)
+                                                               : CONFIGURED_UART_SELECTION;
+  }
+#else
+  constexpr UARTSelection get_uart() const { return CONFIGURED_UART_SELECTION; }
+#endif
+#endif
+#ifdef USE_LOGGER_CONSOLE
+  // Raw bytes on the console port, without log framing; request with logger.request_console()
+#if defined(USE_ARDUINO) && !defined(USE_ESP32)
+  size_t console_write(const uint8_t *data, size_t len) { return this->hw_serial_->write(data, len); }
+  bool console_read(uint8_t &byte) {
+    int c = this->hw_serial_->read();
+    if (c < 0)
+      return false;
+    byte = c;
+    return true;
+  }
+#elif defined(USE_ESP32)
+  /// Blocking write; returns the bytes written.
+  size_t console_write(const uint8_t *data, size_t len);
+  /// Non-blocking read of one byte; false if none is waiting.
+  bool console_read(uint8_t &byte);
+#endif
 #endif

  /// Set the default log level for this logger.
@@ -242,14 +273,17 @@ class Logger final : public Component {
  void log_vprintf_non_main_thread_(uint8_t level, const char *tag, int line, const char *format, va_list args,
                                    const char *thread_name);
 #endif
-#if defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+#ifdef USE_LOGGER_ZEPHYR_CDC_LOOP
  void cdc_loop_();
 #endif
  void process_messages_();
-#if defined(USE_HOST) || defined(USE_ZEPHYR)
-  void write_msg_(const char *msg, uint16_t len);
+  // msg already ends in a newline
+#if defined(USE_ARDUINO) && !defined(USE_ESP32)
+  inline void HOT write_msg_(const char *msg, uint16_t len) { this->hw_serial_->write(msg, len); }
+#elif defined(USE_ESP32)
+  inline void write_msg_(const char *msg, uint16_t len);  // Defined in logger_esp32.h
 #else
-  inline void write_msg_(const char *msg, uint16_t len);  // Defined in platform-specific logger_*.h
+  void write_msg_(const char *msg, uint16_t len);
 #endif

  // Format a log message with printf-style arguments and write it to a buffer with header, footer, and null terminator
@@ -317,7 +351,6 @@ class Logger final : public Component {

 #ifdef USE_ESPHOME_TASK_LOG_BUFFER
  // Helper to format a pre-formatted message from the task log buffer and notify listeners
-  // Used by process_messages_ to avoid code duplication between ESP32 and host platforms
  inline void HOT format_buffered_message_and_notify_(uint8_t level, const char *tag, uint16_t line,
                                                      const char *thread_name, const char *text, uint16_t text_length,
                                                      LogBuffer &buf) {
@@ -359,15 +392,8 @@ class Logger final : public Component {
 #ifdef USE_HOST
  pthread_t main_thread_{};  // Main thread for pthread_equal() comparison
 #endif
-#ifdef USE_ESP32
-  // Task-specific recursion guards:
-  // - Main task uses a dedicated member variable for efficiency
-  // - Other tasks use pthread TLS with a dynamically created key via pthread_key_create
-  pthread_key_t log_recursion_key_;  // 4 bytes
-  uart_port_t uart_num_;             // 4 bytes (enum defaults to int size)
-#endif
-#ifdef USE_HOST
-  // Thread-specific recursion guards using pthread TLS
+#if defined(USE_ESP32) || defined(USE_HOST)
+  // Non-main task recursion guard (pthread TLS)
  pthread_key_t log_recursion_key_;
 #endif

@@ -392,23 +418,10 @@ class Logger final : public Component {
  bool boot_log_done_{false};     // Set on first replay; stops further capture
 #endif
  uint8_t current_level_{ESPHOME_LOG_LEVEL_VERY_VERBOSE};
-#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2) || defined(USE_ZEPHYR)
-  UARTSelection uart_{UART_SELECTION_UART0};  // Must match cpp_default_uart in __init__.py
-#endif
-#ifdef USE_LIBRETINY
-  UARTSelection uart_{UART_SELECTION_DEFAULT};  // Must match cpp_default_uart in __init__.py
-#endif
-#if defined(USE_ESP32) || defined(USE_HOST) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
-  bool main_task_recursion_guard_{false};
+  bool main_task_recursion_guard_{false};  // Guards tx_buffer_ on the main loop
 #ifdef USE_LIBRETINY
  bool non_main_task_recursion_guard_{false};  // Shared guard for all non-main tasks on LibreTiny
 #endif
-  // The guard that protects tx_buffer_ on the main loop, for callers that run on any platform
-  bool &main_loop_recursion_guard_() { return this->main_task_recursion_guard_; }
-#else
-  bool global_recursion_guard_{false};  // Simple global recursion guard for single-task platforms
-  bool &main_loop_recursion_guard_() { return this->global_recursion_guard_; }
-#endif

  // Large buffers placed last to keep frequently-accessed member offsets small
  char tx_buffer_[ESPHOME_LOGGER_TX_BUFFER_SIZE + 1];  // +1 for null terminator
@@ -477,9 +490,9 @@ class Logger final : public Component {
  class NonMainTaskRecursionGuard {
   public:
    explicit NonMainTaskRecursionGuard(pthread_key_t key) : key_(key) {
-      pthread_setspecific(key_, reinterpret_cast<void *>(1));
+      pthread_setspecific(this->key_, reinterpret_cast<void *>(1));
    }
-    ~NonMainTaskRecursionGuard() { pthread_setspecific(key_, nullptr); }
+    ~NonMainTaskRecursionGuard() { pthread_setspecific(this->key_, nullptr); }
    NonMainTaskRecursionGuard(const NonMainTaskRecursionGuard &) = delete;
    NonMainTaskRecursionGuard &operator=(const NonMainTaskRecursionGuard &) = delete;
    NonMainTaskRecursionGuard(NonMainTaskRecursionGuard &&) = delete;
@@ -490,40 +503,24 @@ class Logger final : public Component {
  };

  // Check if non-main task is already in recursion (via TLS)
-  inline bool HOT is_non_main_task_recursive_() const { return pthread_getspecific(log_recursion_key_) != nullptr; }
+  inline bool HOT is_non_main_task_recursive_() const {
+    return pthread_getspecific(this->log_recursion_key_) != nullptr;
+  }

  // Create RAII guard for non-main task recursion
-  inline NonMainTaskRecursionGuard make_non_main_task_guard_() { return NonMainTaskRecursionGuard(log_recursion_key_); }
-
-#elif defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
-  // LibreTiny doesn't have FreeRTOS TLS, so use a simple approach:
-  // - Main task uses dedicated boolean (same as ESP32)
-  // - Non-main tasks share a single recursion guard
-  // This is safe because:
-  // - Recursion from logging within logging is the main concern
-  // - Cross-task "recursion" is prevented by the buffer mutex anyway
-  // - Missing a recursive call from another task is acceptable (falls back to direct output)
-  //
-  // Zephyr use __thread as TLS
-
-  // Check if non-main task is already in recursion
-  inline bool HOT is_non_main_task_recursive_() const { return non_main_task_recursion_guard_; }
-
-  // Create RAII guard for non-main task recursion (uses shared boolean for all non-main tasks)
-  inline RecursionGuard make_non_main_task_guard_() { return RecursionGuard(non_main_task_recursion_guard_); }
-#endif
-
-#if defined(USE_ESPHOME_TASK_LOG_BUFFER) && !(defined(USE_ZEPHYR) && defined(USE_LOGGER_UART_SELECTION_USB_CDC))
-  // Disable loop when task buffer is empty
-  // Zephyr with USB CDC needs loop active to poll port readiness via cdc_loop_()
-  inline void disable_loop_when_buffer_empty_() {
-    // Thread safety note: This is safe even if another task calls enable_loop_soon_any_context()
-    // concurrently. If that happens between our check and disable_loop(), the enable request
-    // will be processed on the next main loop iteration since:
-    // - disable_loop() takes effect immediately
-    // - enable_loop_soon_any_context() sets a pending flag that's checked at loop start
-    this->disable_loop();
+  inline NonMainTaskRecursionGuard make_non_main_task_guard_() {
+    return NonMainTaskRecursionGuard(this->log_recursion_key_);
  }
+
+#elif defined(USE_LIBRETINY)
+  // No FreeRTOS TLS on LibreTiny: all non-main tasks share one guard
+  inline bool HOT is_non_main_task_recursive_() const { return this->non_main_task_recursion_guard_; }
+  inline RecursionGuard make_non_main_task_guard_() { return RecursionGuard(this->non_main_task_recursion_guard_); }
+
+#elif defined(USE_ZEPHYR)
+  // Thread-local guard (__thread)
+  inline bool HOT is_non_main_task_recursive_() const { return non_main_task_recursion_guard; }
+  inline RecursionGuard make_non_main_task_guard_() { return RecursionGuard(non_main_task_recursion_guard); }
 #endif
 };
 extern Logger *global_logger;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
@@ -563,14 +560,7 @@ void log_crash_to_client();

 }  // namespace esphome::logger

-// Platform-specific inline implementations of write_msg_()
-// Must be included after the Logger class definition is complete
-#if defined(USE_ESP32)
+// ESP32 inline write_msg_(), included after the Logger class definition is complete
+#ifdef USE_ESP32
 #include "logger_esp32.h"
-#elif defined(USE_ESP8266)
-#include "logger_esp8266.h"
-#elif defined(USE_RP2)
-#include "logger_rp2.h"
-#elif defined(USE_LIBRETINY)
-#include "logger_libretiny.h"
 #endif
@@ -17,6 +17,9 @@
 #include <driver/usb_serial_jtag_vfs.h>
 #endif
 #endif
+#if defined(USE_LOGGER_CONSOLE) && defined(USE_LOGGER_UART_SELECTION_USB_CDC) && defined(CONFIG_ESP_CONSOLE_USB_CDC)
+#include <esp_private/usb_console.h>
+#endif
 #if defined(CONFIG_PM_ENABLE) && defined(CONFIG_FREERTOS_USE_TICKLESS_IDLE) && \
    (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(6, 0, 0))
 #include "esp_sleep.h"
@@ -73,7 +76,8 @@ static void init_usb_serial_jtag() {
 }
 #endif

-void init_uart(uart_port_t uart_num, uint32_t baud_rate, int tx_buffer_size) {
+#if !defined(USE_LOGGER_UART_SELECTION_USB_CDC) && !defined(USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG)
+static void init_uart(uart_port_t uart_num, uint32_t baud_rate, int tx_buffer_size) {
  uart_config_t uart_config{};
  uart_config.baud_rate = (int) baud_rate;
  uart_config.data_bits = UART_DATA_8_BITS;
@@ -97,37 +101,22 @@ void init_uart(uart_port_t uart_num, uint32_t baud_rate, int tx_buffer_size) {
  esp_sleep_set_console_uart_handling_mode(ESP_SLEEP_ALWAYS_FLUSH_UART);
 #endif
 }
+#endif
+
+// get_uart_num() and pre_setup() cast the selection straight to a port
+static_assert(static_cast<int>(UART_SELECTION_UART0) == static_cast<int>(UART_NUM_0) &&
+              static_cast<int>(UART_SELECTION_UART1) == static_cast<int>(UART_NUM_1));
+#ifdef USE_ESP32_VARIANT_ESP32
+static_assert(static_cast<int>(UART_SELECTION_UART2) == static_cast<int>(UART_NUM_2));
+#endif

 void Logger::pre_setup() {
  if (this->baud_rate_ > 0) {
-    this->uart_num_ = UART_NUM_0;
-    switch (this->uart_) {
-      case UART_SELECTION_UART0:
-        this->uart_num_ = UART_NUM_0;
-        init_uart(this->uart_num_, baud_rate_, ESPHOME_LOGGER_TX_BUFFER_SIZE);
-        break;
-      case UART_SELECTION_UART1:
-        this->uart_num_ = UART_NUM_1;
-        init_uart(this->uart_num_, baud_rate_, ESPHOME_LOGGER_TX_BUFFER_SIZE);
-        break;
-#ifdef USE_ESP32_VARIANT_ESP32
-      case UART_SELECTION_UART2:
-        this->uart_num_ = UART_NUM_2;
-        init_uart(this->uart_num_, baud_rate_, ESPHOME_LOGGER_TX_BUFFER_SIZE);
-        break;
-#endif
-#ifdef USE_LOGGER_USB_CDC
-      case UART_SELECTION_USB_CDC:
-        break;
-#endif
-#ifdef USE_LOGGER_USB_SERIAL_JTAG
-      case UART_SELECTION_USB_SERIAL_JTAG:
 #ifdef USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG
-        init_usb_serial_jtag();
+    init_usb_serial_jtag();
+#elif !defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+    init_uart(this->get_uart_num(), this->baud_rate_, ESPHOME_LOGGER_TX_BUFFER_SIZE);
 #endif
-        break;
-#endif
-    }
  }

  global_logger = this;
@@ -139,29 +128,36 @@ void Logger::pre_setup() {
 #endif
 }

-const LogString *Logger::get_uart_selection_() {
-  switch (this->uart_) {
-    case UART_SELECTION_UART0:
-      return LOG_STR("UART0");
-    case UART_SELECTION_UART1:
-      return LOG_STR("UART1");
-#ifdef USE_ESP32_VARIANT_ESP32
-    case UART_SELECTION_UART2:
-      return LOG_STR("UART2");
+#ifdef USE_LOGGER_CONSOLE
+size_t Logger::console_write(const uint8_t *data, size_t len) {
+  int written = 0;
+#if defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+#ifdef CONFIG_ESP_CONSOLE_USB_CDC
+  written = esp_usb_console_write_buf(reinterpret_cast<const char *>(data), len);
 #endif
-#ifdef USE_LOGGER_USB_CDC
-    case UART_SELECTION_USB_CDC:
-      return LOG_STR("USB_CDC");
+#elif defined(USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG)
+  written = usb_serial_jtag_write_bytes(data, len, 20 / portTICK_PERIOD_MS);
+#else
+  written = uart_write_bytes(this->get_uart_num(), data, len);
 #endif
-#ifdef USE_LOGGER_USB_SERIAL_JTAG
-    case UART_SELECTION_USB_SERIAL_JTAG:
-      return LOG_STR("USB_SERIAL_JTAG");
-#endif
-    default:
-      return LOG_STR("UNKNOWN");
-  }
+  return written > 0 ? written : 0;
 }

+bool Logger::console_read(uint8_t &byte) {
+#if defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+#ifdef CONFIG_ESP_CONSOLE_USB_CDC
+  return esp_usb_console_available_for_read() && esp_usb_console_read_buf(reinterpret_cast<char *>(&byte), 1) == 1;
+#else
+  return false;
+#endif
+#elif defined(USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG)
+  return usb_serial_jtag_read_bytes(&byte, 1, 0) > 0;
+#else
+  return uart_read_bytes(this->get_uart_num(), &byte, 1, 0) > 0;
+#endif
+}
+#endif
+
 #ifdef USE_CRASH_HANDLER
 bool crash_log_pending() { return esp32::crash_handler_has_data(); }
 void log_crash_to_client() {
@@ -19,7 +19,7 @@ inline void HOT Logger::write_msg_(const char *msg, uint16_t len) {
  fwrite(msg, 1, len, stdout);
 #else
  // Regular UART - single write including newline (already in buffer)
-  uart_write_bytes(this->uart_num_, msg, len);
+  uart_write_bytes(this->get_uart_num(), msg, len);
 #endif
 }

@@ -14,9 +14,9 @@ void Logger::pre_setup() {
 #if defined(USE_ESP8266_LOGGER_SERIAL)
  this->hw_serial_ = &Serial;
  Serial.begin(this->baud_rate_);
-  if (this->uart_ == UART_SELECTION_UART0_SWAP) {
-    Serial.swap();
-  }
+#ifdef USE_LOGGER_UART_SELECTION_UART0_SWAP
+  Serial.swap();
+#endif
  Serial.setDebugOutput(ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE);
 #elif defined(USE_ESP8266_LOGGER_SERIAL1)
  this->hw_serial_ = &Serial1;
@@ -35,19 +35,6 @@ void Logger::pre_setup() {
 #endif
 }

-const LogString *Logger::get_uart_selection_() {
-#if defined(USE_ESP8266_LOGGER_SERIAL)
-  if (this->uart_ == UART_SELECTION_UART0_SWAP) {
-    return LOG_STR("UART0_SWAP");
-  }
-  return LOG_STR("UART0");
-#elif defined(USE_ESP8266_LOGGER_SERIAL1)
-  return LOG_STR("UART1");
-#else
-  return LOG_STR("NONE");
-#endif
-}
-
 #ifdef USE_CRASH_HANDLER
 bool crash_log_pending() { return esp8266::crash_handler_has_data(); }
 void log_crash_to_client() { esp8266::crash_handler_log(); }
@@ -1,13 +0,0 @@
-#pragma once
-
-#ifdef USE_ESP8266
-#include "esphome/core/helpers.h"
-
-namespace esphome::logger {
-
-// Single write with newline already in buffer (added by caller)
-inline void HOT Logger::write_msg_(const char *msg, uint16_t len) { this->hw_serial_->write(msg, len); }
-
-}  // namespace esphome::logger
-
-#endif
@@ -12,45 +12,28 @@ ESPHOME_LOG_TAG(TAG, "logger");

 void Logger::pre_setup() {
  if (this->baud_rate_ > 0) {
-    switch (this->uart_) {
-#if LT_HW_UART0
-      case UART_SELECTION_UART0:
-        this->hw_serial_ = &Serial0;
-        libretiny::ensure_serial_handle(0);
-        Serial0.begin(this->baud_rate_);
-        break;
-#endif
-#if LT_HW_UART1
-      case UART_SELECTION_UART1:
-        this->hw_serial_ = &Serial1;
-        libretiny::ensure_serial_handle(1);
-        Serial1.begin(this->baud_rate_);
-        break;
-#endif
-#if LT_HW_UART2
-      case UART_SELECTION_UART2:
-        this->hw_serial_ = &Serial2;
-        libretiny::ensure_serial_handle(2);
-        Serial2.begin(this->baud_rate_);
-        break;
-#endif
-      default:
-        this->hw_serial_ = &Serial;
-        Serial.begin(this->baud_rate_);
-        if (this->uart_ != UART_SELECTION_DEFAULT) {
-          ESP_LOGW(TAG, "  The chosen logger UART port is not available on this board."
-                        "The default port was used instead.");
-        }
-        break;
+#if defined(USE_LOGGER_UART_SELECTION_UART0) && LT_HW_UART0
+    this->hw_serial_ = &Serial0;
+    libretiny::ensure_serial_handle(0);
+    Serial0.begin(this->baud_rate_);
+#elif defined(USE_LOGGER_UART_SELECTION_UART1) && LT_HW_UART1
+    this->hw_serial_ = &Serial1;
+    libretiny::ensure_serial_handle(1);
+    Serial1.begin(this->baud_rate_);
+#elif defined(USE_LOGGER_UART_SELECTION_UART2) && LT_HW_UART2
+    this->hw_serial_ = &Serial2;
+    libretiny::ensure_serial_handle(2);
+    Serial2.begin(this->baud_rate_);
+#else
+    this->hw_serial_ = &Serial;
+    Serial.begin(this->baud_rate_);
+    if (CONFIGURED_UART_SELECTION != UART_SELECTION_DEFAULT) {
+      ESP_LOGW(TAG, "  The chosen logger UART port is not available on this board."
+                    "The default port was used instead.");
    }
-
+#endif
    // change lt_log() port to match default Serial
-    if (this->uart_ == UART_SELECTION_DEFAULT) {
-      this->uart_ = (UARTSelection) (LT_UART_DEFAULT_SERIAL + 1);
-      lt_log_set_port(LT_UART_DEFAULT_SERIAL);
-    } else {
-      lt_log_set_port(this->uart_ - 1);
-    }
+    lt_log_set_port(this->get_uart() - 1);
  }

  global_logger = this;
@@ -60,20 +43,6 @@ void Logger::pre_setup() {
 #endif
 }

-const LogString *Logger::get_uart_selection_() {
-  switch (this->uart_) {
-    case UART_SELECTION_DEFAULT:
-      return LOG_STR("DEFAULT");
-    case UART_SELECTION_UART0:
-      return LOG_STR("UART0");
-    case UART_SELECTION_UART1:
-      return LOG_STR("UART1");
-    case UART_SELECTION_UART2:
-    default:
-      return LOG_STR("UART2");
-  }
-}
-
 #ifdef USE_LIBRETINY_CRASH_HANDLER
 bool crash_log_pending() { return libretiny::crash_handler_has_data(); }
 void log_crash_to_client() { libretiny::crash_handler_log(); }
@@ -1,13 +0,0 @@
-#pragma once
-
-#ifdef USE_LIBRETINY
-#include "esphome/core/helpers.h"
-
-namespace esphome::logger {
-
-// Single write with newline already in buffer (added by caller)
-inline void HOT Logger::write_msg_(const char *msg, uint16_t len) { this->hw_serial_->write(msg, len); }
-
-}  // namespace esphome::logger
-
-#endif
@@ -26,20 +26,16 @@ void Logger::setup() {

 void Logger::pre_setup() {
  if (this->baud_rate_ > 0) {
-    switch (this->uart_) {
-      case UART_SELECTION_UART0:
-        this->hw_serial_ = &Serial1;
-        Serial1.begin(this->baud_rate_);
-        break;
-      case UART_SELECTION_UART1:
-        this->hw_serial_ = &Serial2;
-        Serial2.begin(this->baud_rate_);
-        break;
-      case UART_SELECTION_USB_CDC:
-        this->hw_serial_ = &Serial;
-        Serial.begin(this->baud_rate_);
-        break;
-    }
+#if defined(USE_LOGGER_UART_SELECTION_USB_CDC)
+    this->hw_serial_ = &Serial;
+    Serial.begin(this->baud_rate_);
+#elif defined(USE_LOGGER_UART_SELECTION_UART1)
+    this->hw_serial_ = &Serial2;
+    Serial2.begin(this->baud_rate_);
+#else
+    this->hw_serial_ = &Serial1;
+    Serial1.begin(this->baud_rate_);
+#endif
  }
  global_logger = this;
  ESP_LOGI(TAG, "Log initialized");
@@ -49,21 +45,6 @@ void Logger::pre_setup() {
 #endif
 }

-const LogString *Logger::get_uart_selection_() {
-  switch (this->uart_) {
-    case UART_SELECTION_UART0:
-      return LOG_STR("UART0");
-    case UART_SELECTION_UART1:
-      return LOG_STR("UART1");
-#ifdef USE_LOGGER_USB_CDC
-    case UART_SELECTION_USB_CDC:
-      return LOG_STR("USB_CDC");
-#endif
-    default:
-      return LOG_STR("UNKNOWN");
-  }
-}
-
 #ifdef USE_CRASH_HANDLER
 bool crash_log_pending() { return rp2::crash_handler_has_data(); }
 void log_crash_to_client() { rp2::crash_handler_log(); }
@@ -1,13 +0,0 @@
-#pragma once
-
-#ifdef USE_RP2
-#include "esphome/core/helpers.h"
-
-namespace esphome::logger {
-
-// Single write with newline already in buffer (added by caller)
-inline void HOT Logger::write_msg_(const char *msg, uint16_t len) { this->hw_serial_->write(msg, len); }
-
-}  // namespace esphome::logger
-
-#endif
@@ -42,9 +42,9 @@ __attribute__((section(".noinit"))) struct {

 ESPHOME_LOG_TAG(TAG, "logger");

-#ifdef USE_LOGGER_UART_SELECTION_USB_CDC
+#ifdef USE_LOGGER_ZEPHYR_CDC_LOOP
 void Logger::cdc_loop_() {
-  if (this->uart_ != UART_SELECTION_USB_CDC || this->uart_dev_ == nullptr) {
+  if (this->uart_dev_ == nullptr) {
    return;
  }
  static bool opened = false;
@@ -74,26 +74,20 @@ void Logger::cdc_loop_() {
 void Logger::pre_setup() {
 #ifdef CONFIG_SERIAL
  if (this->baud_rate_ > 0) {
-    static const struct device *uart_dev = nullptr;
-    switch (this->uart_) {
-      case UART_SELECTION_UART0:  // NOLINT(bugprone-branch-clone)
-        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(ESPHOME_LOGGER_UART0_NODE));
-        break;
-      case UART_SELECTION_UART1:
-        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(uart1));
-        break;
-#ifdef USE_LOGGER_USB_CDC
-      case UART_SELECTION_USB_CDC:
+    const struct device *uart_dev = nullptr;
+#if defined(USE_LOGGER_UART_SELECTION_USB_CDC)
 #if defined(CONFIG_USB_DEVICE_STACK) || defined(CONFIG_USB_DEVICE_STACK_NEXT)
-        uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(cdc_acm_uart0));
-        if (device_is_ready(uart_dev)) {
-          // Nothing can log this early, and the logger has no output without USB anyway
-          zephyr::usb_device_enable();
-        }
-#endif
-        break;
-#endif
+    uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(cdc_acm_uart0));
+    if (device_is_ready(uart_dev)) {
+      // Nothing can log this early, and the logger has no output without USB anyway
+      zephyr::usb_device_enable();
    }
+#endif
+#elif defined(USE_LOGGER_UART_SELECTION_UART1)
+    uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(uart1));
+#else
+    uart_dev = DEVICE_DT_GET_OR_NULL(DT_NODELABEL(ESPHOME_LOGGER_UART0_NODE));
+#endif
    if (device_is_ready(uart_dev)) {
      this->uart_dev_ = uart_dev;
 #if defined(USE_LOGGER_WAIT_FOR_CDC) && defined(USE_LOGGER_UART_SELECTION_USB_CDC)
@@ -114,14 +108,10 @@ void Logger::pre_setup() {
  char reason_buffer[zephyr::RESET_REASON_BUFFER_SIZE];
  const char *reset_reason = zephyr::get_reset_reason(std::span<char, zephyr::RESET_REASON_BUFFER_SIZE>(reason_buffer));
  ESP_LOGI(TAG, "Reset reason: %s", reset_reason);
-  dump_crash_();
+  this->dump_crash_();
 #endif
-#ifdef USE_CRASH_HANDLER
-#ifdef USE_LOGGER_UART_SELECTION_USB_CDC
  // Nobody reads a USB port this early; cdc_loop_() reports the dump once the port is opened
-  if (this->uart_ == UART_SELECTION_USB_CDC)
-    return;
-#endif
+#if defined(USE_CRASH_HANDLER) && !defined(USE_LOGGER_ZEPHYR_CDC_LOOP)
  // Without a UART (baud_rate: 0, or one that did not come up) nothing reaches the console
  if (this->uart_dev_ != nullptr)
    log_crash_to_client();
@@ -143,22 +133,7 @@ void HOT Logger::write_msg_(const char *msg, uint16_t len) {
  }
 }

-const LogString *Logger::get_uart_selection_() {
-  switch (this->uart_) {
-    case UART_SELECTION_UART0:
-      return LOG_STR("UART0");
-    case UART_SELECTION_UART1:
-      return LOG_STR("UART1");
-#ifdef USE_LOGGER_USB_CDC
-    case UART_SELECTION_USB_CDC:
-      return LOG_STR("USB_CDC");
-#endif
-    default:
-      return LOG_STR("UNKNOWN");
-  }
-}
-
-static const uint8_t REASON_BUF_SIZE = 32;
+static constexpr uint8_t REASON_BUF_SIZE = 32;

 static const char *reason_to_str(unsigned int reason, char *buf) {
  switch (reason) {
@@ -44,19 +44,15 @@ void TaskLogBuffer::release_message_main_loop() {

 bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uint16_t line, const char *thread_name,
                                             const char *format, va_list args) {
-  // First, calculate the exact length needed using a null buffer (no actual writing)
+  // Measure on a copy; the caller's va_list formats the text later
  va_list args_copy;
  va_copy(args_copy, args);
-  int ret = vsnprintf(nullptr, 0, format, args_copy);
+  int ret = task_log_cap_length(vsnprintf(nullptr, 0, format, args_copy));
  va_end(args_copy);
-
  if (ret <= 0) {
    return false;  // Formatting error or empty message
  }
-
-  // Calculate actual text length (capped to maximum size)
-  static constexpr size_t MAX_TEXT_SIZE = 255;
-  size_t text_length = (static_cast<size_t>(ret) > MAX_TEXT_SIZE) ? MAX_TEXT_SIZE : ret;
+  uint16_t text_length = ret;

  // Calculate total size needed (header + text length + null terminator)
  size_t total_size = sizeof(LogMessage) + text_length + 1;
@@ -69,24 +65,10 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin
    return false;  // Failed to acquire memory
  }

-  // Set up the message header in the acquired memory
  LogMessage *msg = static_cast<LogMessage *>(acquired_memory);
-  msg->level = level;
-  msg->tag = tag;
-  msg->line = line;
-
-  // Store the thread name now instead of waiting until main loop processing
-  // This avoids crashes if the task completes or is deleted between when this message
-  // is enqueued and when it's processed by the main loop
-  if (thread_name != nullptr) {
-    strncpy(msg->thread_name, thread_name, sizeof(msg->thread_name) - 1);
-    msg->thread_name[sizeof(msg->thread_name) - 1] = '\0';  // Ensure null termination
-  } else {
-    msg->thread_name[0] = '\0';  // Empty string if no thread name
-  }
+  fill_task_log_header(msg, level, tag, line, thread_name);

  // Format the message text directly into the acquired memory
-  // We add 1 to text_length to ensure space for null terminator during formatting
  char *text_area = msg->text_data();
  ret = vsnprintf(text_area, text_length + 1, format, args);

@@ -96,12 +78,7 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin
    return false;
  }

-  // Remove trailing newlines
-  while (text_length > 0 && text_area[text_length - 1] == '\n') {
-    text_length--;
-  }
-
-  msg->text_length = text_length;
+  msg->text_length = trim_trailing_newlines(text_area, text_length);
  // Complete the send operation with the acquired memory
  result = xRingbufferSendComplete(this->handle_(), acquired_memory);

@@ -12,6 +12,8 @@
 #include <freertos/FreeRTOS.h>
 #include <freertos/ringbuf.h>

+#include "task_log_message.h"
+
 namespace esphome::logger {

 /**
@@ -32,19 +34,7 @@ namespace esphome::logger {
 */
 class TaskLogBuffer {
 public:
-  // Structure for a log message header (text data follows immediately after)
-  struct LogMessage {
-    const char *tag;       // We store the pointer, assuming tags are static
-    char thread_name[16];  // Store thread name directly (only used for non-main threads)
-    uint16_t text_length;  // Length of the message text (up to ~64KB)
-    uint16_t line;         // Source code line number
-    uint8_t level;         // Log level (0-7)
-
-    // Methods for accessing message contents
-    inline char *text_data() { return reinterpret_cast<char *>(this) + sizeof(LogMessage); }
-
-    inline const char *text_data() const { return reinterpret_cast<const char *>(this) + sizeof(LogMessage); }
-  };
+  using LogMessage = TaskLogMessage;

  TaskLogBuffer();
  // No destructor: Logger is never destroyed
@@ -71,18 +71,8 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin

  LogMessage &msg = this->slots_[slot_index];

-  // Fill in the message header
-  msg.level = level;
-  msg.tag = tag;
-  msg.line = line;
-
-  // Store the thread name now to avoid crashes if thread exits before processing
-  if (thread_name != nullptr) {
-    strncpy(msg.thread_name, thread_name, sizeof(msg.thread_name) - 1);
-    msg.thread_name[sizeof(msg.thread_name) - 1] = '\0';
-  } else {
-    msg.thread_name[0] = '\0';
-  }
+  // Copied now; the thread may exit before processing
+  fill_task_log_header(&msg, level, tag, line, thread_name);

  // Format the message text
  int ret = vsnprintf(msg.text, sizeof(msg.text), format, args);
@@ -94,10 +84,7 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin
    msg.text_length = static_cast<uint16_t>(std::min(static_cast<size_t>(ret), sizeof(msg.text) - 1));
  }

-  // Remove trailing newlines
-  while (msg.text_length > 0 && msg.text[msg.text_length - 1] == '\n') {
-    msg.text_length--;
-  }
+  msg.text_length = trim_trailing_newlines(msg.text, msg.text_length);
  msg.text[msg.text_length] = '\0';

  // Commit the slot
@@ -13,6 +13,8 @@
 #include <cstring>
 #include <pthread.h>

+#include "task_log_message.h"
+
 namespace esphome::logger {

 /**
@@ -13,13 +13,6 @@ TaskLogBuffer::TaskLogBuffer() {
  this->mutex_ = xSemaphoreCreateMutex();
 }

-TaskLogBuffer::~TaskLogBuffer() {
-  if (this->mutex_ != nullptr) {
-    vSemaphoreDelete(this->mutex_);
-    this->mutex_ = nullptr;
-  }
-}
-
 size_t TaskLogBuffer::available_contiguous_space_() const {
  if (this->head_ >= this->tail_) {
    // head is ahead of or equal to tail
@@ -85,19 +78,15 @@ void TaskLogBuffer::release_message_main_loop() {

 bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uint16_t line, const char *thread_name,
                                             const char *format, va_list args) {
-  // First, calculate the exact length needed using a null buffer (no actual writing)
+  // Measure on a copy; the caller's va_list formats the text later
  va_list args_copy;
  va_copy(args_copy, args);
-  int ret = vsnprintf(nullptr, 0, format, args_copy);
+  int ret = task_log_cap_length(vsnprintf(nullptr, 0, format, args_copy));
  va_end(args_copy);
-
  if (ret <= 0) {
    return false;  // Formatting error or empty message
  }
-
-  // Calculate actual text length (capped to maximum size)
-  static constexpr size_t MAX_TEXT_SIZE = 255;
-  size_t text_length = (static_cast<size_t>(ret) > MAX_TEXT_SIZE) ? MAX_TEXT_SIZE : ret;
+  uint16_t text_length = ret;

  // Calculate total size needed (header + text length + null terminator)
  size_t total_size = message_total_size(text_length);
@@ -128,17 +117,7 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin

  // Write message header
  LogMessage *msg = reinterpret_cast<LogMessage *>(this->storage_ + write_pos);
-  msg->level = level;
-  msg->tag = tag;
-  msg->line = line;
-
-  // Store the thread name now to avoid crashes if task is deleted before processing
-  if (thread_name != nullptr) {
-    strncpy(msg->thread_name, thread_name, sizeof(msg->thread_name) - 1);
-    msg->thread_name[sizeof(msg->thread_name) - 1] = '\0';
-  } else {
-    msg->thread_name[0] = '\0';
-  }
+  fill_task_log_header(msg, level, tag, line, thread_name);

  // Format the message text directly into the buffer
  char *text_area = msg->text_data();
@@ -150,9 +129,7 @@ bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uin
  }

  // Trim before storing so the next message reuses the freed bytes
-  while (text_length > 0 && text_area[text_length - 1] == '\n') {
-    text_length--;
-  }
+  text_length = trim_trailing_newlines(text_area, text_length);
  text_area[text_length] = '\0';
  msg->text_length = text_length;

@@ -13,6 +13,8 @@
 #include <semphr.h>
 #include <task.h>

+#include "task_log_message.h"
+
 namespace esphome::logger {

 /**
@@ -42,25 +44,14 @@ namespace esphome::logger {
 */
 class TaskLogBuffer {
 public:
-  // Structure for a log message header (text data follows immediately after)
-  struct LogMessage {
-    const char *tag;       // We store the pointer, assuming tags are static
-    char thread_name[16];  // Store thread name directly (only used for non-main threads)
-    uint16_t text_length;  // Length of the message text (up to ~64KB)
-    uint16_t line;         // Source code line number
-    uint8_t level;         // Log level (0-7)
-
-    // Methods for accessing message contents
-    inline char *text_data() { return reinterpret_cast<char *>(this) + sizeof(LogMessage); }
-    inline const char *text_data() const { return reinterpret_cast<const char *>(this) + sizeof(LogMessage); }
-  };
+  using LogMessage = TaskLogMessage;

  // Padding marker level to indicate wrap-around point (stored in LogMessage.level field)
  // Valid log levels are 0-7, so 0xFF cannot be a real message
  static constexpr uint8_t PADDING_MARKER_LEVEL = 0xFF;

  TaskLogBuffer();
-  ~TaskLogBuffer();
+  // No destructor: Logger is never destroyed

  // NOT thread-safe - borrow a message from the buffer, only call from main loop
  bool borrow_message_main_loop(LogMessage *&message, uint16_t &text_length);
@@ -4,7 +4,7 @@

 namespace esphome::logger {

-__thread bool non_main_task_recursion_guard_;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
+__thread bool non_main_task_recursion_guard;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)

 #ifdef USE_ESPHOME_TASK_LOG_BUFFER

@@ -29,29 +29,21 @@ TaskLogBuffer::TaskLogBuffer() {

 bool TaskLogBuffer::send_message_thread_safe(uint8_t level, const char *tag, uint16_t line, const char *thread_name,
                                             const char *format, va_list args) {
-  // First, calculate the exact length needed using a null buffer (no actual writing)
+  // Measure on a copy; the caller's va_list formats the text later
  va_list args_copy;
  va_copy(args_copy, args);
-  int ret = vsnprintf(nullptr, 0, format, args_copy);
+  int ret = task_log_cap_length(vsnprintf(nullptr, 0, format, args_copy));
  va_end(args_copy);
-
  if (ret <= 0) {
    return false;  // Formatting error or empty message
  }
-
-  // Calculate actual text length (capped to maximum size)
-  static constexpr size_t MAX_TEXT_SIZE = 255;
-  size_t text_length = (static_cast<size_t>(ret) > MAX_TEXT_SIZE) ? MAX_TEXT_SIZE : ret;
+  uint16_t text_length = ret;
  size_t total_size = total_size_in_32bit_words(text_length);
  auto *msg = reinterpret_cast<LogMessage *>(mpsc_pbuf_alloc(&this->log_buffer_, total_size, K_NO_WAIT));
  if (msg == nullptr) {
    return false;
  }
-  msg->level = level;
-  msg->tag = tag;
-  msg->line = line;
-  strncpy(msg->thread_name, thread_name, sizeof(msg->thread_name) - 1);
-  msg->thread_name[sizeof(msg->thread_name) - 1] = '\0';  // Ensure null termination
+  fill_task_log_header(msg, level, tag, line, thread_name);

  // Format the message text directly into the acquired memory
  // We add 1 to text_length to ensure space for null terminator during formatting
@@ -90,11 +82,7 @@ bool TaskLogBuffer::borrow_message_main_loop(LogMessage *&message, uint16_t &tex
  // we claimed buffer already, const_cast is safe here
  message = const_cast<LogMessage *>(reinterpret_cast<const LogMessage *>(this->current_token_));

-  text_length = message->text_length;
-  // Remove trailing newlines
-  while (text_length > 0 && message->text_data()[text_length - 1] == '\n') {
-    text_length--;
-  }
+  text_length = trim_trailing_newlines(message->text_data(), message->text_length);

  return true;
 }
@@ -6,12 +6,14 @@
 #include "esphome/core/helpers.h"
 #include <zephyr/sys/mpsc_pbuf.h>

+#include "task_log_message.h"
+
 namespace esphome::logger {

 // "0x" + 2 hex digits per byte + '\0'
 static constexpr size_t MAX_POINTER_REPRESENTATION = 2 + sizeof(void *) * 2 + 1;

-extern __thread bool non_main_task_recursion_guard_;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
+extern __thread bool non_main_task_recursion_guard;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)

 #ifdef USE_ESPHOME_TASK_LOG_BUFFER

@@ -34,7 +36,6 @@ class TaskLogBuffer {
    inline char *text_data() { return reinterpret_cast<char *>(this) + sizeof(LogMessage); }
  };
  TaskLogBuffer();
-  ~TaskLogBuffer() = default;

  // Check if there are messages ready to be processed using an atomic counter for performance
  inline bool HOT has_messages() { return mpsc_pbuf_is_pending(&this->log_buffer_); }
@@ -0,0 +1,54 @@
+#pragma once
+
+#include "esphome/core/defines.h"
+
+#ifdef USE_ESPHOME_TASK_LOG_BUFFER
+#include <cstdarg>
+#include <cstddef>
+#include <cstdint>
+#include <cstdio>
+#include <cstring>
+
+namespace esphome::logger {
+
+#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+// Header of a variable-size task log message; the text follows it
+struct TaskLogMessage {
+  const char *tag;       // We store the pointer, assuming tags are static
+  char thread_name[16];  // Copied, the task may be gone before the main loop reads it
+  uint16_t text_length;
+  uint16_t line;
+  uint8_t level;
+
+  inline char *text_data() { return reinterpret_cast<char *>(this) + sizeof(TaskLogMessage); }
+};
+#endif
+
+#if defined(USE_ESP32) || defined(USE_LIBRETINY) || defined(USE_ZEPHYR)
+static constexpr int TASK_LOG_MAX_TEXT_SIZE = 255;
+
+inline int task_log_cap_length(int ret) { return ret > TASK_LOG_MAX_TEXT_SIZE ? TASK_LOG_MAX_TEXT_SIZE : ret; }
+#endif
+
+template<typename Message>
+inline void fill_task_log_header(Message *msg, uint8_t level, const char *tag, uint16_t line, const char *thread_name) {
+  msg->level = level;
+  msg->tag = tag;
+  msg->line = line;
+  if (thread_name != nullptr) {
+    strncpy(msg->thread_name, thread_name, sizeof(msg->thread_name) - 1);
+    msg->thread_name[sizeof(msg->thread_name) - 1] = '\0';
+  } else {
+    msg->thread_name[0] = '\0';
+  }
+}
+
+inline uint16_t trim_trailing_newlines(const char *text, uint16_t length) {
+  while (length > 0 && text[length - 1] == '\n')
+    length--;
+  return length;
+}
+
+}  // namespace esphome::logger
+
+#endif  // USE_ESPHOME_TASK_LOG_BUFFER
@@ -151,6 +151,7 @@
 #define USE_LINE_READER
 #define USE_LOCK
 #define USE_LOGGER
+#define USE_LOGGER_CONSOLE
 #define USE_LOGGER_LEVEL_LISTENERS
 #define USE_LOGGER_RUNTIME_TAG_LEVELS
 #define USE_LVGL
@@ -758,16 +759,26 @@
 #if defined(USE_ESP32_VARIANT_ESP32S2)
 #define USE_LOGGER_USB_CDC
 #define USE_LOGGER_UART_SELECTION_USB_CDC
+#define ESPHOME_LOGGER_UART_NAME "USB_CDC"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_USB_CDC
 #elif defined(USE_ESP32_VARIANT_ESP32H21)
 #define USE_LOGGER_USB_SERIAL_JTAG
+#define USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG
+#define ESPHOME_LOGGER_UART_NAME "USB_SERIAL_JTAG"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_USB_SERIAL_JTAG
 #elif 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) || \
-    defined(USE_ESP32_VARIANT_ESP32H21) || defined(USE_ESP32_VARIANT_ESP32H4) || defined(USE_ESP32_VARIANT_ESP32P4) || \
-    defined(USE_ESP32_VARIANT_ESP32S3) || defined(USE_ESP32_VARIANT_ESP32S31)
+    defined(USE_ESP32_VARIANT_ESP32H4) || defined(USE_ESP32_VARIANT_ESP32P4) || defined(USE_ESP32_VARIANT_ESP32S3) || \
+    defined(USE_ESP32_VARIANT_ESP32S31)
 #define USE_LOGGER_USB_CDC
-#define USE_LOGGER_UART_SELECTION_USB_CDC
 #define USE_LOGGER_USB_SERIAL_JTAG
 #define USE_LOGGER_UART_SELECTION_USB_SERIAL_JTAG
+#define ESPHOME_LOGGER_UART_NAME "USB_SERIAL_JTAG"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_USB_SERIAL_JTAG
+#else
+#define USE_LOGGER_UART_SELECTION_UART0
+#define ESPHOME_LOGGER_UART_NAME "UART0"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_UART0
 #endif
 #endif

@@ -781,6 +792,9 @@
 #define USE_WIFI_SCAN_RESULTS_LOCK
 #define USE_ESP8266_LOGGER_SERIAL
 #define USE_ESP8266_LOGGER_SERIAL1
+#define USE_LOGGER_UART_SELECTION_UART0
+#define ESPHOME_LOGGER_UART_NAME "UART0"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_UART0
 #define USE_ESP8266_PREFERENCES_FLASH
 #define ESP8266_PREFERENCES_FLASH_WORDS 128
 #define ESP8266_PREFERENCES_RTC_EBOOT_WORDS 32
@@ -826,6 +840,8 @@
 #define USE_I2C
 #define USE_LOGGER_USB_CDC
 #define USE_LOGGER_UART_SELECTION_USB_CDC
+#define ESPHOME_LOGGER_UART_NAME "USB_CDC"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_USB_CDC
 #define USE_SOCKET_IMPL_LWIP_TCP
 #define USE_RP2040_BLE
 #define USE_RP2_BLE_TRACKER
@@ -856,6 +872,9 @@
 #if defined(USE_BK72XX) || defined(USE_RTL87XX) || defined(USE_LN882X)
 #define USE_LIBRETINY_CRASH_HANDLER
 #endif
+#define USE_LOGGER_UART_SELECTION_DEFAULT
+#define ESPHOME_LOGGER_UART_NAME "DEFAULT"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_DEFAULT
 #ifdef USE_BK72XX
 #define USE_REMOTE_RECEIVER_TIMER_SAMPLING
 #endif
@@ -910,8 +929,11 @@
 #define ESPHOME_TASK_LOG_BUFFER_SIZE 768
 #define USE_LOGGER_EARLY_MESSAGE
 #define USE_LOGGER_UART_SELECTION_USB_CDC
+#define ESPHOME_LOGGER_UART_NAME "USB_CDC"
+#define ESPHOME_LOGGER_UART_SELECTION logger::UART_SELECTION_USB_CDC
 #define USE_LOGGER_USB_CDC
 #define USE_LOGGER_WAIT_FOR_CDC
+#define USE_LOGGER_ZEPHYR_CDC_LOOP
 #define USE_NRF52_DFU
 #define USE_NRF52_REG0_VOUT 5
 #define USE_NRF52_UICR_ERASE
@@ -337,6 +337,57 @@ size_t truncate_name_to(char *buffer, size_t buffer_size, const char *name, size

 // Parsing & formatting

+// A plain decimal converts exactly with one division: the digits accumulate
+// into an integer that stays below 2^24 and the fraction's scale is a power of
+// ten up to 1e9 (2^9 * 5^9), so both convert to float exactly and IEEE division
+// rounds the quotient correctly, the same result strtof produces.
+static constexpr uint32_t PARSE_FLOAT_MANTISSA_LIMIT = 1000000;  // one more digit stays below 2^24
+static constexpr uint32_t PARSE_FLOAT_MAX_FRACTION_DIGITS = 9;
+
+optional<float> parse_float(const char *str) {
+  const char *p = str;
+  const bool negative = *p == '-';
+  if (negative || *p == '+')
+    p++;
+  const char *digits = p;
+  const char *dot = nullptr;
+  uint32_t mantissa = 0;
+  for (;; p++) {
+    const uint32_t d = static_cast<unsigned char>(*p) - '0';
+    if (d > 9) {
+      if (*p == '.' && dot == nullptr) {
+        dot = p;
+        continue;
+      }
+      break;
+    }
+    if (mantissa >= PARSE_FLOAT_MANTISSA_LIMIT)
+      break;
+    mantissa = mantissa * 10 + d;
+  }
+  const uint32_t fraction_digits = dot != nullptr ? p - dot - 1 : 0;
+  const bool any_digit = p - digits > (dot != nullptr ? 1 : 0);
+  if (*p == '\0' && any_digit && fraction_digits <= PARSE_FLOAT_MAX_FRACTION_DIGITS) {
+    // The mantissa is exact in a float, so the sign goes on before the one rounding step
+    float value = static_cast<float>(mantissa);
+    if (negative)
+      value = -value;
+    if (fraction_digits != 0) {
+      uint32_t scale = 10;
+      for (uint32_t i = 1; i < fraction_digits; i++)
+        scale *= 10;
+      value /= static_cast<float>(scale);
+    }
+    return value;
+  }
+  // Exponents, hex, inf, nan, leading whitespace and longer inputs take the libc path.
+  char *end = nullptr;
+  const float value = ::strtof(str, &end);
+  if (end == str || *end != '\0' || value == HUGE_VALF)
+    return {};
+  return value;
+}
+
 size_t parse_hex(const char *str, size_t length, uint8_t *data, size_t count) {
  size_t chars = std::min(length, 2 * count);
  for (size_t i = 2 * count - chars; i < 2 * count; i++, str++) {
@@ -25,7 +25,6 @@
 #include <strings.h>

 #include "esphome/core/optional.h"
-#include "esphome/core/parse_float.h"
 #include "esphome/core/time_conversion.h"

 #ifdef USE_ESP8266
@@ -1034,26 +1033,6 @@ inline float pow10_int(int8_t exp) {
  return result;
 }

-/// 10^n, exact while it fits in T.
-template<typename T> constexpr T pow10_exact(uint32_t n) {
-  T result = 1;
-  T base = 10;
-  for (;;) {
-    if ((n & 1) != 0)
-      result *= base;
-    n >>= 1;
-    if (n == 0)
-      return result;
-    base *= base;
-  }
-}
-
-/// Whether c is '0' to '9'.
-constexpr bool is_digit(char c) { return static_cast<uint8_t>(c - '0') <= 9; }
-
-/// Whether c is C-locale white space, without isspace's ctype table.
-constexpr bool is_space_c(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); }
-
 /// Remap \p value from the range (\p min, \p max) to (\p min_out, \p max_out).
 template<typename T, typename U> T remap(U value, U min, U max, T min_out, T max_out) {
  return (value - min) * (max_out - min_out) / (max - min) + min_out;
@@ -1594,6 +1573,8 @@ template<typename T, enable_if_t<(std::is_integral<T>::value && std::is_signed<T
 optional<T> parse_number(const std::string &str) {
  return parse_number<T>(str.c_str());
 }
+/// Parse a decimal floating-point number; plain decimals skip the libc parser.
+optional<float> parse_float(const char *str);
 /// Parse a decimal floating-point number from a null-terminated string.
 template<typename T, enable_if_t<(std::is_same<T, float>::value), int> = 0> optional<T> parse_number(const char *str) {
  return parse_float(str);
@@ -1,372 +0,0 @@
-// picolibc 1.8.10's strtof, bit for bit, without libc's strtod: decimals round to 9 digits, then to the nearest float.
-// Float bits are built from integers, so chips that flush denormals give the same result.
-
-#include "esphome/core/parse_float.h"
-#include "esphome/core/hal.h"
-#include "esphome/core/helpers.h"
-
-#include <algorithm>
-#include <bit>
-
-namespace esphome {
-
-namespace {
-
-constexpr uint32_t FLOAT_SIGN_BIT = 0x80000000, FLOAT_INF_BITS = 0x7F800000;
-constexpr uint32_t FLOAT_NAN_BITS = 0x7FC00000;  // nanf(""), which strtof returns for every NaN
-
-constexpr uint32_t DECIMAL_DIGITS = 9, HEX_DIGITS = 8;  // digits kept before the rest only round
-constexpr int32_t EXPONENT_CAP = 224;  // picolibc stops adding exponent digits once the exponent reaches this
-// 0.<digits> * 10^exp10 is zero at or below MIN_EXP10 and infinity at or above MAX_EXP10, as in picolibc
-constexpr int32_t MIN_EXP10 = -46, MAX_EXP10 = 40;
-// Past this, one more digit could pass 2^24
-constexpr uint32_t PLAIN_MANTISSA_LIMIT = 1677720;
-
-// Bits of the float nearest to (m + sticky fraction) * 2^e, ties to even; m > 0
-uint32_t round_to_float_bits(uint64_t m, int32_t e, bool sticky) {
-  const int32_t msb = e + static_cast<int32_t>(std::bit_width(m)) - 1;  // the value is in [2^msb, 2^(msb + 1))
-  if (msb >= 128)
-    return FLOAT_INF_BITS;
-  if (msb < -150)  // below half the smallest float
-    return 0;
-  // The unit of the float's last bit: 2^(msb - 23), or 2^-149 for a denormal
-  const int32_t shift = std::max<int32_t>(msb - 23, -149) - e;  // at most 64
-  uint64_t q;
-  if (shift <= 0) {
-    q = m << -shift;
-  } else {
-    q = shift < 64 ? m >> shift : 0;
-    const uint64_t rem = shift < 64 ? m & ((uint64_t{1} << shift) - 1) : m;
-    const uint64_t half = uint64_t{1} << (shift - 1);
-    if (rem > half || (rem == half && (sticky || (q & 1) != 0)))
-      q++;
-  }
-  if (msb < -126)
-    return static_cast<uint32_t>(q);  // 2^23 here is the smallest normal float, as it should be
-  // Rounding up past the largest float gives exactly FLOAT_INF_BITS
-  return (static_cast<uint32_t>(msb + 127) << 23) + static_cast<uint32_t>(q - (uint64_t{1} << 23));
-}
-
-// The decimal exponents that reach decimal_to_float_bits: 1 to 9 digits and MIN_EXP10 < digits + e10 < MAX_EXP10
-constexpr int32_t MIN_E10 = MIN_EXP10 + 1 - static_cast<int32_t>(DECIMAL_DIGITS), MAX_E10 = MAX_EXP10 - 2;
-// Top 64 bits of 10^(8k), rounded down: 10^(8k) = entry * 2^(floor_log2_pow10(8k) - 63), exact for k = 0..3
-constexpr int32_t POW10_BY_8_FIRST = MIN_E10 >> 3, POW10_BY_8_LAST = MAX_E10 >> 3;
-constexpr uint64_t POW10_BY_8[] PROGMEM = {
-    0xFB158592BE068D2E, 0xBB127C53B17EC159, 0x8B61313BBABCE2C6, 0xCFB11EAD453994BA,
-    0x9ABE14CD44753B52, 0xE69594BEC44DE15B, 0xABCC77118461CEFC, 0x8000000000000000,
-    0xBEBC200000000000, 0x8E1BC9BF04000000, 0xD3C21BCECCEDA100, 0x9DC5ADA82B70B59D,
-};
-static_assert(POW10_BY_8_FIRST == -7 && POW10_BY_8_LAST == 4 &&
-                  sizeof(POW10_BY_8) / sizeof(POW10_BY_8[0]) == POW10_BY_8_LAST - POW10_BY_8_FIRST + 1,
-              "POW10_BY_8 must cover MIN_E10..MAX_E10");
-
-// floor(q * log2(10)), for |q| < 100
-constexpr int32_t floor_log2_pow10(int32_t q) { return (q * 217706) >> 16; }
-
-// The top 64 bits of a * b, rounded down
-uint64_t mul_high(uint64_t a, uint64_t b) {
-  const uint64_t a_lo = static_cast<uint32_t>(a), a_hi = a >> 32;
-  const uint64_t b_lo = static_cast<uint32_t>(b), b_hi = b >> 32;
-  const uint64_t hi_lo = a_hi * b_lo, lo_hi = a_lo * b_hi;
-  const uint64_t middle = ((a_lo * b_lo) >> 32) + static_cast<uint32_t>(hi_lo) + static_cast<uint32_t>(lo_hi);
-  return a_hi * b_hi + (hi_lo >> 32) + (lo_hi >> 32) + (middle >> 32);
-}
-
-// Cold: a decimal within 16 units of a midpoint is an exact tie when m10 * 5^e10 is an integer
-__attribute__((noinline, cold)) uint32_t tie_float_bits(uint32_t m10, int32_t e10, uint32_t bits) {
-  if (e10 >= 0) {
-    if (e10 <= 14)  // m10 * 5^14 stays below 2^64
-      return round_to_float_bits(m10 * (pow10_exact<uint64_t>(e10) >> e10), e10, false);
-  } else if (e10 >= -13) {
-    const auto pow5 = static_cast<uint32_t>(pow10_exact<uint64_t>(-e10) >> -e10);
-    if (m10 % pow5 == 0)
-      return round_to_float_bits(m10 / pow5, e10, false);
-  }
-  return bits;
-}
-
-// The float nearest to m10 * 10^e10 (0 < m10 <= 10^9). The product is under 4 units low; checked for all 85 billion
-// (m10, e10), only exact ties and one non-tie (6 units off, keeps its float) come within 34 units of a midpoint.
-uint32_t decimal_to_float_bits(uint32_t m10, int32_t e10) {
-  // Both operands are exact floats, so the one float operation gives the nearest float
-  const uint32_t power = e10 < 0 ? -e10 : e10;
-  if (m10 < (1u << 24) && power <= 10) {
-    const auto value = static_cast<float>(m10);
-    // 10^10 overflows uint32_t
-    const float factor = power == 10 ? 1e10f : static_cast<float>(pow10_exact<uint32_t>(power));
-    return bit_cast<uint32_t>(e10 < 0 ? value / factor : value * factor);
-  }
-  const int32_t k8 = e10 >> 3;  // rounds down
-  const uint64_t x = uint64_t{m10} * pow10_exact<uint32_t>(e10 & 7);
-  const auto zeros = static_cast<int32_t>(std::countl_zero(x));
-  uint64_t m = x << zeros;
-  int32_t e = -zeros;
-  if (k8 == 0)
-    return round_to_float_bits(m, e, false);  // exact
-  m = mul_high(m, POW10_BY_8[k8 - POW10_BY_8_FIRST]);
-  e += floor_log2_pow10(8 * k8) + 1;
-  if ((m >> 63) == 0) {
-    m <<= 1;
-    e--;
-  }
-  const uint32_t bits = round_to_float_bits(m, e, false);
-  // The bits below the float's last one, and the midpoint among them
-  const int32_t shift = std::max<int32_t>(40, -149 - e);
-  if (shift <= 64) {
-    const uint64_t low = shift < 64 ? m & ((uint64_t{1} << shift) - 1) : m;
-    const uint64_t half = uint64_t{1} << (shift - 1);
-    if (low - half + 16 > 32)  // |low - half| > 16
-      return bits;
-  }
-  return tie_float_bits(m10, e10, bits);
-}
-
-uint32_t no_number(const char *str, const char **end, bool *negative) {
-  *end = str;
-  *negative = false;
-  return 0;
-}
-
-// The rest of an "nan" or "inf" after its first letter at p; returns the end, or nullptr for no number
-const char *read_inf_nan(const char *p) {
-  const auto lower = [](char c) { return static_cast<char>(c | 0x20); };
-  if (lower(*p) == 'n') {
-    if (lower(p[1]) != 'a' || lower(p[2]) != 'n')
-      return nullptr;
-    p += 3;
-    if (*p != '(')
-      return p;
-    // "nan(" must be closed after letters, digits and '_'
-    do {
-      p++;
-    } while (static_cast<uint8_t>(lower(*p) - 'a') < 26 || is_digit(*p) || *p == '_');
-    return *p == ')' ? p + 1 : nullptr;
-  }
-  if (lower(p[1]) != 'n' || lower(p[2]) != 'f')
-    return nullptr;
-  p += 3;
-  if (lower(*p) != 'i')
-    return p;
-  // Past "infi", only "infinity" is a number
-  return lower(p[1]) == 'n' && lower(p[2]) == 'i' && lower(p[3]) == 't' && lower(p[4]) == 'y' ? p + 5 : nullptr;
-}
-
-// Reads a binary exponent "p" or decimal exponent "e" at p into *exp; returns the end of the number
-const char *read_exponent(const char *p, char letter, int32_t *exp) {
-  if ((*p | 0x20) != letter)
-    return p;
-  const char *q = p + 1;
-  const bool negative = *q == '-';
-  if (negative || *q == '+')
-    q++;
-  if (!is_digit(*q))
-    return p;
-  int32_t value = 0;
-  for (; is_digit(*q); q++) {
-    if (value < EXPONENT_CAP)
-      value = value * 10 + (*q - '0');
-  }
-  *exp += negative ? -value : value;
-  return q;
-}
-
-// Hex digits after the "x" at p, with the point and decimal exponent read so far (no non-zero digit yet)
-__attribute__((noinline, cold)) uint32_t read_hex(const char *p, bool dot, int32_t exp, const char **end) {
-  uint32_t m = 0, kept = 0;  // kept: digits in m from its first non-zero one
-  bool sticky = false;
-  for (;; p++) {
-    const char lower = static_cast<char>(*p | 0x20);
-    uint32_t digit = static_cast<uint8_t>(*p - '0');
-    if (static_cast<uint8_t>(lower - 'a') <= 5) {
-      digit = static_cast<uint8_t>(lower - 'a') + 10;
-    } else if (digit > 9) {
-      digit = 16;  // picolibc takes ':' to '?' as 10 to 15; we stop there like newlib
-    }
-    if (digit < 16) {
-      if (kept < HEX_DIGITS) {
-        if (dot)
-          exp--;
-        m = m * 16 + digit;
-        kept += m != 0 ? 1 : 0;
-      } else {
-        if (!dot)
-          exp++;
-        sticky |= digit != 0;
-      }
-    } else if (*p == '.' && !dot) {
-      dot = true;
-    } else if (lower != 'x' || m != 0) {  // picolibc takes another "x" while the value is still zero
-      break;
-    }
-  }
-  exp *= 4;
-  *end = read_exponent(p, 'p', &exp);
-  return m == 0 ? 0 : round_to_float_bits(m, exp, sticky);
-}
-
-// picolibc's conv_flt for a float from the first digit or point at p: returns the bits; *end is str for no number
-__attribute__((noinline)) uint32_t read_decimal(const char *str, const char *p, const char **end) {
-  uint32_t m = 0, kept = 0;  // the first (up to 9) significant digits, and how many from the first non-zero one
-  int32_t exp = 0;           // the value is m * 10^exp
-  bool dot = false, any = false;
-  uint32_t overflow = 0;  // digits past the kept ones: 0 none, 1 below half, 2 half, 3 above half
-  bool full = false;      // a digit past the kept ones was read
-  for (;; p++) {
-    const uint32_t digit = static_cast<uint8_t>(*p - '0');
-    if (digit <= 9) {
-      any = true;
-      if (kept < DECIMAL_DIGITS) {
-        if (dot)
-          exp--;
-        m = m * 10 + digit;
-        kept += m != 0 ? 1 : 0;
-      } else {
-        if (!dot)
-          exp++;
-        if (!full) {
-          full = true;
-          overflow = digit > 5 ? 3 : digit == 5 ? 2 : digit != 0 ? 1 : 0;  // the first one decides the half
-        } else {
-          overflow |= digit != 0 ? 1 : 0;
-        }
-      }
-    } else if (*p == '.' && !dot) {
-      dot = true;
-    } else {
-      break;
-    }
-  }
-  if ((*p | 0x20) == 'x' && any && m == 0)
-    return read_hex(p + 1, dot, exp, end);
-  if (!any) {
-    *end = str;
-    return 0;
-  }
-  *end = read_exponent(p, 'e', &exp);
-  if (m == 0)
-    return 0;
-  // Ties to even on the decimal digits
-  overflow |= m & 1;
-  m += (overflow + 1) >> 2;
-  const int32_t exp10 = static_cast<int32_t>(kept) + exp;
-  if (exp10 <= MIN_EXP10)
-    return 0;
-  if (exp10 >= MAX_EXP10)
-    return FLOAT_INF_BITS;
-  return decimal_to_float_bits(m, exp);
-}
-
-// picolibc's strtof from the start: returns the bits without the sign, which goes in *negative
-__attribute__((noinline)) uint32_t parse_float_full(const char *str, const char **end, bool *negative) {
-  // No number starts with a letter but i (inf) or n (nan): "unavailable", "on" and "unknown" stop here
-  const char first = static_cast<char>(*str | 0x20);
-  if (first >= 'a' && first <= 'z' && first != 'i' && first != 'n')
-    return no_number(str, end, negative);
-  const char *p = str;
-  while (is_space_c(*p))
-    p++;
-  *negative = *p == '-';
-  if (*negative || *p == '+')
-    p++;
-  const char lower = static_cast<char>(*p | 0x20);
-  if (lower == 'i' || lower == 'n') {
-    const char *stop = read_inf_nan(p);
-    if (stop == nullptr)
-      return no_number(str, end, negative);
-    *end = stop;
-    return lower == 'i' ? FLOAT_INF_BITS : FLOAT_NAN_BITS;
-  }
-  const uint32_t bits = read_decimal(str, p, end);
-  if (*end == str)
-    *negative = false;
-  return bits;
-}
-
-// A plain decimal below 2^24 with up to 9 digits after the point, in one float operation; nullptr otherwise
-ESPHOME_ALWAYS_INLINE inline const char *parse_plain_decimal(const char *str, uint32_t *bits, bool *negative) {
-  const char *p = str;
-  *negative = *p == '-';
-  if (*negative || *p == '+')
-    p++;
-  const char *digits = p;
-  const char *point = nullptr;
-  uint32_t mantissa = 0;
-  for (;; p++) {
-    const uint32_t d = static_cast<uint8_t>(*p) - '0';
-    if (d > 9) {
-      if (*p == '.' && point == nullptr) {
-        point = p;
-        continue;
-      }
-      break;
-    }
-    if (mantissa > PLAIN_MANTISSA_LIMIT)
-      return nullptr;
-    mantissa = mantissa * 10 + d;
-  }
-  const uint32_t fraction = point != nullptr ? p - point - 1 : 0;
-  const char c = static_cast<char>(*p | 0x20);
-  if (p - digits == (point != nullptr ? 1 : 0) || fraction > 9 || c == 'e' || c == 'x')
-    return nullptr;
-  float value = static_cast<float>(mantissa);
-  if (fraction != 0)
-    value /= static_cast<float>(pow10_exact<uint32_t>(fraction));  // 10^9 is an exact float
-  *bits = bit_cast<uint32_t>(value);
-  return p;
-}
-
-}  // namespace
-
-optional<float> parse_float(const char *str) {
-  // Own copy of the plain-decimal loop: sharing parse_plain_decimal costs 12 to 18% more instructions
-  const char *p = str;
-  const bool negative = *p == '-';
-  if (negative || *p == '+')
-    p++;
-  const char *digits = p;
-  const char *point = nullptr;
-  uint32_t mantissa = 0;
-  for (;; p++) {
-    const uint32_t d = static_cast<uint8_t>(*p) - '0';
-    if (d > 9) {
-      if (*p == '.' && point == nullptr) {
-        point = p;
-        continue;
-      }
-      break;
-    }
-    if (mantissa > PLAIN_MANTISSA_LIMIT)
-      break;
-    mantissa = mantissa * 10 + d;
-  }
-  const uint32_t fraction = point != nullptr ? p - point - 1 : 0;
-  if (*p == '\0' && p - digits > (point != nullptr ? 1 : 0) && fraction <= 9) {
-    float value = negative ? -static_cast<float>(mantissa) : static_cast<float>(mantissa);
-    if (fraction != 0)
-      value /= static_cast<float>(pow10_exact<uint32_t>(fraction));
-    return value;
-  }
-  const char *end;
-  bool full_negative;
-  const uint32_t bits = parse_float_full(str, &end, &full_negative);
-  // HUGE_VALF, positive overflow or "inf", is rejected like before
-  if (end == str || *end != '\0' || (!full_negative && bits == FLOAT_INF_BITS))
-    return {};
-  return bit_cast<float>(full_negative ? bits | FLOAT_SIGN_BIT : bits);
-}
-
-float str_to_float(const char *str, char **end) {
-  const char *stop;
-  bool negative;
-  uint32_t bits;
-  if (const char *plain_end = parse_plain_decimal(str, &bits, &negative)) {
-    stop = plain_end;
-  } else {
-    bits = parse_float_full(str, &stop, &negative);
-  }
-  if (end != nullptr)
-    *end = const_cast<char *>(stop);  // strtof's signature
-  return bit_cast<float>(negative ? bits | FLOAT_SIGN_BIT : bits);
-}
-
-}  // namespace esphome
@@ -1,17 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include "esphome/core/optional.h"
-
-namespace esphome {
-
-/// The whole string as str_to_float's syntax (leading space, hex, inf, nan); trailing characters, "inf" and positive
-/// overflow are rejected, while -inf, negative overflow and NaN are accepted.
-optional<float> parse_float(const char *str);
-
-/// strtof with picolibc's results on every platform, but it never sets errno (overflow gives +-HUGE_VALF, underflow 0);
-/// use it instead of strtof, or strtod/atof for a float result.
-float str_to_float(const char *str, char **end);
-
-}  // namespace esphome
@@ -7,7 +7,6 @@
 #include <memory>
 #include <string>
 #include "esphome/core/defines.h"
-#include "esphome/core/parse_float.h"

 #ifdef USE_JSON
 #include "esphome/components/json/json_util.h"
@@ -294,7 +293,7 @@ inline bool operator!=(const std::string &lhs, const ProgmemStringRef &rhs) { re
 #endif

 // String conversion functions for ADL compatibility (allows stoi(x) where x is StringRef)
-// Must be in esphome namespace for ADL to find them. Uses strtol, strtod and str_to_float to avoid heap allocation.
+// Must be in esphome namespace for ADL to find them. Uses strtol/strtod directly to avoid heap allocation.
 namespace internal {
 // NOLINTBEGIN(google-runtime-int)
 template<typename R, typename F> inline R parse_number(const StringRef &str, size_t *pos, F conv) {
@@ -335,7 +334,7 @@ inline long stol(const StringRef &str, size_t *pos = nullptr, int base = 10) {
  return internal::parse_number<long>(str, pos, base, std::strtol);
 }
 inline float stof(const StringRef &str, size_t *pos = nullptr) {
-  return internal::parse_number<float>(str, pos, str_to_float);
+  return internal::parse_number<float>(str, pos, std::strtof);
 }
 inline double stod(const StringRef &str, size_t *pos = nullptr) {
  return internal::parse_number<double>(str, pos, std::strtod);
@@ -1,40 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#include "esphome/core/helpers.h"
-
-namespace esphome::benchmarks {
-
-// Inner iteration count to amortize CodSpeed instrumentation overhead.
-static constexpr int kInnerIterations = 2000;
-
-static const char *const PLAIN[] = {"0.5", "255", "-12.75", "21.3"};
-static const char *const EXPONENT[] = {"1e3", "2.5e-2", "-6.02E5", "1.5e+1"};
-static const char *const PRECISE[] = {"3.14159265358979", "0.000123456789", "123456789.125", "-0.1000000000000000055"};
-// Home Assistant states that are not numbers
-static const char *const REJECT[] = {"unavailable", "unknown", "on", "off"};
-
-template<size_t N, typename F> static void run(benchmark::State &state, const char *const (&inputs)[N], F parse) {
-  for (auto _ : state) {
-    float sum = 0.0f;
-    for (int i = 0; i < kInnerIterations; i++)
-      sum += parse(inputs[i % N]);
-    benchmark::DoNotOptimize(sum);
-  }
-  state.SetItemsProcessed(state.iterations() * kInnerIterations);
-}
-
-static float parse_number_float(const char *str) { return parse_number<float>(str).value_or(0.0f); }
-
-static void ParseNumberFloat_Plain(benchmark::State &state) { run(state, PLAIN, parse_number_float); }
-BENCHMARK(ParseNumberFloat_Plain);
-
-static void ParseNumberFloat_Exponent(benchmark::State &state) { run(state, EXPONENT, parse_number_float); }
-BENCHMARK(ParseNumberFloat_Exponent);
-
-static void ParseNumberFloat_Precise(benchmark::State &state) { run(state, PRECISE, parse_number_float); }
-BENCHMARK(ParseNumberFloat_Precise);
-
-static void ParseNumberFloat_Reject(benchmark::State &state) { run(state, REJECT, parse_number_float); }
-BENCHMARK(ParseNumberFloat_Reject);
-
-}  // namespace esphome::benchmarks
@@ -68,38 +68,6 @@ def test_logger_pre_setup_before_other_components(generate_main):
        )


-def test_default_uart_selection_is_not_emitted(generate_main):
-    """UART0 is the C++ initializer on ESP8266, so the setter is skipped."""
-    main_cpp = generate_main("tests/component_tests/logger/test_logger.yaml")
-
-    assert "set_uart_selection(" not in main_cpp
-
-
-def test_custom_uart_selection_is_emitted(generate_main):
-    """A non default UART still reaches the setter before pre_setup()."""
-    main_cpp = generate_main("tests/component_tests/logger/test_logger_uart1.yaml")
-
-    assert "set_uart_selection(logger::UART_SELECTION_UART1);" in main_cpp
-
-
-def test_libretiny_default_uart_selection_is_not_emitted(generate_main):
-    """DEFAULT is the C++ initializer on LibreTiny, so the setter is skipped."""
-    main_cpp = generate_main(
-        "tests/component_tests/logger/test_logger_libretiny_default.yaml"
-    )
-
-    assert "set_uart_selection(" not in main_cpp
-
-
-def test_libretiny_uart0_is_emitted(generate_main):
-    """UART0 is not the LibreTiny initializer, so it must still be set."""
-    main_cpp = generate_main(
-        "tests/component_tests/logger/test_logger_libretiny_uart0.yaml"
-    )
-
-    assert "set_uart_selection(logger::UART_SELECTION_UART0);" in main_cpp
-
-
 def test_ram_log_strings_is_deprecated(
    generate_main: Callable[[str | Path], str],
    caplog: pytest.LogCaptureFixture,
@@ -168,23 +136,108 @@ def test_log_v2_only_on_native_toolchain(


@pytest.mark.parametrize(
-    ("config", "usb_cdc"),
+    ("config", "port", "name", "zephyr_cdc_loop"),
    [
-        pytest.param("test_logger_rp2_usb_cdc.yaml", True, id="usb_cdc"),
-        pytest.param("test_logger_rp2_uart0.yaml", False, id="uart0"),
+        pytest.param("test_logger.yaml", "UART0", "UART0", False, id="esp8266_default"),
+        pytest.param(
+            "test_logger_uart1.yaml", "UART1", "UART1", False, id="esp8266_uart1"
+        ),
+        pytest.param(
+            "test_logger_uart0_swap.yaml",
+            "UART0_SWAP",
+            "UART0_SWAP",
+            False,
+            id="esp8266_uart0_swap",
+        ),
+        # ESP8266 without serial logging never opens a port
+        pytest.param(
+            "test_logger_no_serial.yaml", "UART0", "NONE", False, id="esp8266_no_serial"
+        ),
+        pytest.param(
+            "test_logger_libretiny_default.yaml",
+            "DEFAULT",
+            "DEFAULT",
+            False,
+            id="libretiny_default",
+        ),
+        pytest.param(
+            "test_logger_libretiny_uart0.yaml",
+            "UART0",
+            "UART0",
+            False,
+            id="libretiny_uart0",
+        ),
+        pytest.param(
+            "test_logger_rp2_usb_cdc.yaml",
+            "USB_CDC",
+            "USB_CDC",
+            False,
+            id="rp2_usb_cdc",
+        ),
+        pytest.param(
+            "test_logger_rp2_uart0.yaml", "UART0", "UART0", False, id="rp2_uart0"
+        ),
+        pytest.param(
+            "test_logger_esp32_usb_cdc.yaml",
+            "USB_CDC",
+            "USB_CDC",
+            False,
+            id="esp32_usb_cdc",
+        ),
+        pytest.param(
+            "test_logger_esp32_usb_serial_jtag.yaml",
+            "USB_SERIAL_JTAG",
+            "USB_SERIAL_JTAG",
+            False,
+            id="esp32_usb_serial_jtag",
+        ),
+        pytest.param(
+            "test_logger_nrf52_usb_cdc.yaml",
+            "USB_CDC",
+            "USB_CDC",
+            True,
+            id="nrf52_usb_cdc",
+        ),
+        # Zephyr polls the USB port only when it logs there
+        pytest.param(
+            "test_logger_nrf52_usb_cdc_no_serial.yaml",
+            "USB_CDC",
+            "USB_CDC",
+            False,
+            id="nrf52_no_serial",
+        ),
    ],
 )
-def test_rp2_usb_cdc_selection_define(
+def test_uart_selection_defines(
    generate_main: Callable[[str | Path], str],
    config: str,
-    usb_cdc: bool,
+    port: str,
+    name: str,
+    zephyr_cdc_loop: bool,
 ) -> None:
-    """The USB CDC crash replay only compiles in when the logger uses USB CDC."""
+    """The chosen port is fixed at build time: one flag, its enum value and its dump_config name."""
    generate_main(f"tests/component_tests/logger/{config}")

+    defines = {d.name: d.value for d in CORE.defines}
+    prefix = "USE_LOGGER_UART_SELECTION_"
+    assert {d.removeprefix(prefix) for d in defines if d.startswith(prefix)} == {port}
    assert (
-        "USE_LOGGER_UART_SELECTION_USB_CDC" in {d.name for d in CORE.defines}
-    ) is usb_cdc
+        str(defines["ESPHOME_LOGGER_UART_SELECTION"])
+        == f"logger::UART_SELECTION_{port}"
+    )
+    assert str(defines["ESPHOME_LOGGER_UART_NAME"]) == f'"{name}"'
+    assert ("USE_LOGGER_ZEPHYR_CDC_LOOP" in defines) is zephyr_cdc_loop
+
+
+def test_log_listener_slots_count_every_listener(
+    generate_main: Callable[[str | Path], str],
+) -> None:
+    """Two on_message triggers and the API each take a slot."""
+    generate_main("tests/component_tests/logger/test_logger_listeners.yaml")
+
+    assert (
+        str({d.name: d.value for d in CORE.defines}["ESPHOME_LOG_MAX_LISTENERS"]) == "3"
+    )


@pytest.mark.parametrize(
@@ -0,0 +1,11 @@
+---
+esphome:
+  name: test
+
+esp32:
+  variant: esp32s3
+  framework:
+    type: esp-idf
+
+logger:
+  hardware_uart: USB_CDC
@@ -0,0 +1,11 @@
+---
+esphome:
+  name: test
+
+esp32:
+  variant: esp32c3
+  framework:
+    type: esp-idf
+
+logger:
+  hardware_uart: USB_SERIAL_JTAG
@@ -0,0 +1,23 @@
+---
+esphome:
+  name: test
+
+esp32:
+  variant: esp32
+  framework:
+    type: esp-idf
+
+wifi:
+  ssid: test
+  password: testtesttest
+
+api:
+
+logger:
+  on_message:
+    - level: ERROR
+      then:
+        - lambda: "(void) message;"
+    - level: WARN
+      then:
+        - lambda: "(void) message;"
@@ -0,0 +1,9 @@
+---
+esphome:
+  name: test
+
+esp8266:
+  board: d1_mini_lite
+
+logger:
+  baud_rate: 0
@@ -0,0 +1,10 @@
+---
+esphome:
+  name: test
+
+nrf52:
+  board: adafruit_itsybitsy_nrf52840
+  bootloader: adafruit_nrf52_sd140_v6
+
+logger:
+  hardware_uart: USB_CDC
@@ -0,0 +1,11 @@
+---
+esphome:
+  name: test
+
+nrf52:
+  board: adafruit_itsybitsy_nrf52840
+  bootloader: adafruit_nrf52_sd140_v6
+
+logger:
+  hardware_uart: USB_CDC
+  baud_rate: 0
@@ -0,0 +1,9 @@
+---
+esphome:
+  name: test
+
+esp8266:
+  board: d1_mini_lite
+
+logger:
+  hardware_uart: UART0_SWAP
@@ -1,74 +1,34 @@
 #include <gtest/gtest.h>

-#include <cmath>
 #include <cstdint>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
-#include <random>
 #include <string>

 #include "esphome/core/helpers.h"
-#include "esphome/core/parse_float.h"

-#ifdef USE_HOST
 namespace esphome::core::testing {

-static uint32_t bits(float value) { return bit_cast<uint32_t>(value); }
-
-// picolibc rounds a decimal to 9 significant digits and converts those to the nearest float, so up to 9
-// significant digits its result is the correctly rounded float the host's strtof (glibc, macOS) gives. Longer
-// input and the syntax where libcs differ are checked against values taken from picolibc 1.8.10's own strtof.
-static float reference_strtof(const char *str, char **end) {
-  const float value = ::strtof(str, end);
-  if (std::isnan(value))
-    return std::signbit(value) ? -NAN : NAN;
-  return value;
+static uint32_t bits(float value) {
+  uint32_t out;
+  memcpy(&out, &value, sizeof(out));
+  return out;
 }

-// Every accepted input must give the reference's bits.
+// strtof is the reference: every accepted input must give the same bits.
 static void expect_matches_strtof(const char *str) {
-  const float expected = reference_strtof(str, nullptr);
+  char *end = nullptr;
+  const float expected = ::strtof(str, &end);
  const auto parsed = parse_number<float>(str);
  if (!parsed.has_value()) {
    ADD_FAILURE() << str << " was rejected";
    return;
  }
-  EXPECT_EQ(bits(parsed.value()), bits(expected)) << str;
+  const float actual = parsed.value();
+  EXPECT_EQ(bits(actual), bits(expected)) << str << " parsed " << actual << " expected " << expected;
 }

-// The same bits and end as the host's strtof; for decimals of up to 9 significant digits
-static void expect_str_to_float_matches(const char *str) {
-  char *expected_end = nullptr;
-  const float expected = reference_strtof(str, &expected_end);
-  char *end = nullptr;
-  const float actual = str_to_float(str, &end);
-  EXPECT_EQ(bits(actual), bits(expected)) << '"' << str << '"';
-  EXPECT_EQ(end - str, expected_end - str) << '"' << str << '"';
-}
-
-struct PicolibcCase {
-  const char *str;
-  uint32_t bits;
-  int32_t end;
-};
-
-// Bits and end from picolibc 1.8.10's strtof
-static void expect_picolibc(const PicolibcCase &c) {
-  char *end = nullptr;
-  const float value = str_to_float(c.str, &end);
-  EXPECT_EQ(bits(value), c.bits) << '"' << c.str << '"';
-  EXPECT_EQ(end - c.str, c.end) << '"' << c.str << '"';
-}
-
-static void expect_picolibc(const std::string &str, uint32_t expected) {
-  char *end = nullptr;
-  EXPECT_EQ(bits(str_to_float(str.c_str(), &end)), expected) << str.substr(0, 40);
-  EXPECT_EQ(static_cast<size_t>(end - str.c_str()), str.size()) << str.substr(0, 40);
-}
-
-static float float_from(uint32_t value) { return bit_cast<float>(value); }
-
 TEST(ParseFloat, PlainDecimalsMatchStrtof) {
  for (const char *str :
       {"0",     "-0",      "+0",        "1",        "-1",          "100.50",      "99.75",       "0.1", "0.3",
@@ -86,14 +46,6 @@ TEST(ParseFloat, SweepOfTwoDecimalValuesMatchesStrtof) {
  }
 }

-// Eight-digit mantissas below 2^24 stay on the one-division path; the next digit past the limit falls back
-TEST(ParseFloat, EightDigitPlainDecimalsMatchStrtof) {
-  for (const char *str : {"12345678", "-12345678", "1234.5678", "0.12345678", "16777209", "1677720.9", "0.16777209",
-                          "16777210", "16777215", "1677721.5", "99999999", "9999999.9", "16777209."}) {
-    expect_matches_strtof(str);
-  }
-}
-
 // A fraction longer than the fast path accepts must fall back, however long it is.
 TEST(ParseFloat, LongFractionsMatchStrtof) {
  std::string str = "0.";
@@ -116,293 +68,10 @@ TEST(ParseFloat, LibcPathInputsMatchStrtof) {
 // Positive overflow and a positive literal infinity both come back as HUGE_VALF from strtof, and the parser
 // rejects both; the negative forms pass through, as they did before the fast path.
 TEST(ParseFloat, RejectsInvalidInput) {
-  for (const char *str : {"", "-", "+", ".", "abc", "12abc", "1.2.3", "1,5", "12 ", "--1", "1e", "1e400", "inf",
-                          "infinity", "infi", "nan(12 ab)", "nan(12"}) {
+  for (const char *str :
+       {"", "-", "+", ".", "abc", "12abc", "1.2.3", "1,5", "12 ", "--1", "1e", "1e400", "inf", "infinity"}) {
    EXPECT_FALSE(parse_number<float>(str).has_value()) << str;
  }
 }

-// Above the midpoint 1 + 2^-24 by less than half a double: newlib's strtof rounds to the midpoint and then to
-// 1.0f; picolibc's 9 digits, 1.00000006, give the next float.
-TEST(ParseFloat, FullPathRoundsLikePicolibc) {
-  EXPECT_EQ(bits(parse_number<float>("1.0000000596046448").value()), 0x3F800001u);
-  EXPECT_EQ(bits(parse_number<float>("-1.0000000596046448").value()), 0xBF800001u);
-}
-
-// picolibc takes "nan(" with letters, digits and '_' up to a ")", and nothing at all otherwise
-TEST(ParseFloat, NanForms) {
-  EXPECT_TRUE(std::isnan(parse_number<float>("nan(12)").value()));
-  EXPECT_TRUE(std::isnan(parse_number<float>("nan(xyz_1)").value()));
-  EXPECT_FALSE(parse_number<float>("nan(x y)").has_value());
-}
-
-// The callers' overflow check: a positive overflow is HUGE_VALF and rejected, a negative one is -inf and accepted
-TEST(ParseFloat, OverflowIsHugeValf) {
-  EXPECT_FALSE(parse_number<float>("1e39").has_value());
-  EXPECT_FALSE(parse_number<float>("3.40282357e38").has_value());
-  EXPECT_FALSE(parse_number<float>("1e99999").has_value());
-  EXPECT_EQ(bits(parse_number<float>("-1e39").value()), 0xFF800000u);
-  EXPECT_EQ(bits(parse_number<float>("3.4028235e38").value()), 0x7F7FFFFFu);
-}
-
-// Up to 9 significant digits, with leading and trailing zeros, a point anywhere and an exponent
-TEST(StrToFloat, RandomDecimalsMatchStrtof) {
-  std::mt19937_64 rng(1);  // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed) reproducible
-  for (int i = 0; i < 50000; i++) {
-    std::string str;
-    if (rng() % 3 == 0)
-      str += (rng() & 1) ? "-" : "+";
-    const int zeros = static_cast<int>(rng() % 4);
-    const int significant = 1 + static_cast<int>(rng() % 9);
-    const int trailing = static_cast<int>(rng() % 4);
-    std::string digits(zeros, '0');
-    digits += static_cast<char>('1' + rng() % 9);
-    for (int j = 1; j < significant; j++)
-      digits += static_cast<char>('0' + rng() % 10);
-    digits.append(trailing, '0');
-    const int point = static_cast<int>(rng() % (digits.size() + 2)) - 1;
-    for (int j = 0; j < static_cast<int>(digits.size()); j++) {
-      if (j == point)
-        str += '.';
-      str += digits[j];
-    }
-    if (rng() & 1) {
-      str += (rng() & 1) ? 'e' : 'E';
-      char exp[8];
-      snprintf(exp, sizeof(exp), "%d", static_cast<int>(rng() % 110) - 60);
-      str += exp;
-    }
-    expect_str_to_float_matches(str.c_str());
-  }
-}
-
-// Every 16411th float, printed with 6 and 9 digits
-TEST(StrToFloat, FloatsMatchStrtof) {
-  char buf[64];
-  for (uint32_t u = 0; u < 0x7F800000; u += 16411) {
-    for (int precision : {6, 9}) {
-      snprintf(buf, sizeof(buf), "%.*e", precision - 1, static_cast<double>(float_from(u)));
-      expect_str_to_float_matches(buf);
-    }
-  }
-}
-
-TEST(StrToFloat, SyntaxMatchesStrtof) {
-  // Tokens whose combinations the libcs read alike: no "x", "nan(" or "infi"
-  static const char *const TOKENS[] = {"0", "1", "9", ".", "e", "E", "+", "-", "a", "N", " ", "\t", "y", "00", "#", ""};
-  for (const char *a : TOKENS) {
-    for (const char *b : TOKENS) {
-      for (const char *c : TOKENS) {
-        for (const char *d : TOKENS) {
-          const std::string str = std::string(a) + b + c + d;
-          expect_str_to_float_matches(str.c_str());
-        }
-      }
-    }
-  }
-}
-
-// Where newlib and glibc read the text differently from picolibc
-TEST(StrToFloat, SyntaxMatchesPicolibc) {
-  static const PicolibcCase CASES[] = {
-      // "x" after any zero digits starts hex, even after a point or a second "0x"
-      {"000x", 0x00000000, 4},
-      {"0x", 0x00000000, 2},
-      {"-0x", 0x80000000, 3},
-      {"00x1", 0x3F800000, 4},
-      {"0x0x1", 0x3F800000, 5},
-      {"0.0x1", 0x3B800000, 5},
-      {".x1", 0x00000000, 0},
-      {"0x.p1", 0x00000000, 5},
-      {"0x.8", 0x3F000000, 4},
-      {"0X1.8", 0x3FC00000, 5},
-      {"0x1P-1", 0x3F000000, 6},
-      {"0x1p+", 0x3F800000, 3},
-      {"1x5", 0x3F800000, 1},
-      // "inf" stops before anything but "i"; past "infi" only "infinity" is a number
-      {"inf", 0x7F800000, 3},
-      {"-inf", 0xFF800000, 4},
-      {"INFINITY", 0x7F800000, 8},
-      {"+infi0", 0x00000000, 0},
-      {"infi", 0x00000000, 0},
-      {"infinit", 0x00000000, 0},
-      // "nan(" takes letters, digits and '_' up to ")", and is no number without the ")"
-      {"NaN", 0x7FC00000, 3},
-      {"nan()", 0x7FC00000, 5},
-      {"nan(xyz)", 0x7FC00000, 8},
-      {"nan(_a1)", 0x7FC00000, 8},
-      {"-nan(1)", 0xFFC00000, 7},
-      {"nan( )", 0x00000000, 0},
-      {"nan(12 ab)", 0x00000000, 0},
-      {"nan(12", 0x00000000, 0},
-      // An exponent needs a digit
-      {"1e", 0x3F800000, 1},
-      {"1e+", 0x3F800000, 1},
-      {"1e-x", 0x3F800000, 1},
-      {"\t 12", 0x41400000, 4},
-      {"- 1", 0x00000000, 0},
-      {"1.2.3", 0x3F99999A, 3},
-  };
-  for (const PicolibcCase &c : CASES)
-    expect_picolibc(c);
-}
-
-// The inputs where newlib's strtof (decimal to double to float) and picolibc's were found to differ; every platform
-// now gives picolibc's result, which is also the correctly rounded float for these
-TEST(StrToFloat, RoundsLikePicolibcWhereNewlibDoubleRounds) {
-  expect_picolibc({"1.0000000596046448", 0x3F800001, 18});
-  expect_picolibc({"0x1.100b0d0000000c", 0x3F880587, 18});
-  expect_picolibc("1.000000059604644775390625" + std::string(800, '0') + "1", 0x3F800001);
-}
-
-// picolibc rounds a decimal to 9 significant digits, ties to even, before converting it: past 9 digits its float can
-// be one away from the nearest, and an exact tie between two floats can round up. Values from picolibc.
-TEST(StrToFloat, NineDigitRoundingLikePicolibc) {
-  static const PicolibcCase CASES[] = {
-      {"1.0856183295439e10", 0x5021C50E, 18},          // nearest 0x5021C50D
-      {"3.97496754550e-4", 0x39D0671D, 16},            // nearest 0x39D0671C
-      {"9.76178673657108930e23", 0x674EB6C1, 22},      // nearest 0x674EB6C0
-      {"156.6562236e-26", 0x17F269ED, 15},             // nearest 0x17F269EC
-      {"1.000000059604644775390625", 0x3F800001, 26},  // the tie 1 + 2^-24: nearest-even 0x3F800000
-      {"1.000000059", 0x3F800001, 11},                 // 1.00000006 after rounding
-      {"7.0064923216240854e-46", 0x00000000, 22},      // 7.00649232e-46, below half the smallest float
-      {"21.299999999999997", 0x41AA6666, 18},
-      {"0.30000000000000004", 0x3E99999A, 19},
-      {"0.1000000000000000055511151231257827", 0x3DCCCCCD, 36},
-  };
-  for (const PicolibcCase &c : CASES)
-    expect_picolibc(c);
-}
-
-// Nine digits converted exactly: ties to even between floats, where the 64-bit product cannot decide alone
-TEST(StrToFloat, NineDigitTiesGoToEven) {
-  static const PicolibcCase CASES[] = {
-      {"16777217", 0x4B800000, 8},  {"16777219", 0x4B800002, 8},    {"16777217.0", 0x4B800000, 10},
-      {"8388608.5", 0x4B000000, 9}, {"8388609.5", 0x4B000002, 9},   {"3e10", 0x50DF8476, 4},
-      {"5e10", 0x513A43B7, 4},      {"1.00000006", 0x3F800001, 10},
-  };
-  for (const PicolibcCase &c : CASES)
-    expect_picolibc(c);
-}
-
-// RP2350 flushes float denormals in its double to float conversion; #22677 bench. The parser builds the bits
-// with integer operations, so every denormal parses to its own value.
-TEST(StrToFloat, DenormalsParseWithoutFlushing) {
-  char buf[64];
-  const auto check = [&buf](uint32_t k) {
-    snprintf(buf, sizeof(buf), "%.8e", std::ldexp(static_cast<double>(k), -149));
-    EXPECT_EQ(bits(str_to_float(buf, nullptr)), k) << buf;
-  };
-  for (uint32_t k = 0; k <= 0x800000; k += 4099)
-    check(k);
-  // The largest denormal and FLT_MIN, where rounding carries into the exponent
-  for (uint32_t k : {1u, 2u, 0x7FFFFEu, 0x7FFFFFu, 0x800000u})
-    check(k);
-}
-
-// Pico W and Pico 2 W bench, #22677: the RP2040 and RP2350 libcs flush float denormals to 0 in their double to
-// float conversion, and the RP2040 one turns a NaN into +infinity
-TEST(StrToFloat, Rp2040LibcFlushesAndNanToInfinity) {
-  static const PicolibcCase CASES[] = {
-      {"1e-40", 0x000116C2, 5},          {"1.4e-45", 0x00000001, 7},  {"1e-38", 0x006CE3EE, 5},
-      {"1.1754942e-38", 0x007FFFFF, 13}, {"0x1p-149", 0x00000001, 8}, {"1.17549435e-38", 0x00800000, 14},
-      {"nan(12)", 0x7FC00000, 7},        {"nan", 0x7FC00000, 3},
-  };
-  for (const PicolibcCase &c : CASES)
-    expect_picolibc(c);
-}
-
-// RP2350 bench: libc returned 0 and the first parser stalled stepping up from a flushed guess; #22677 bench
-TEST(StrToFloat, DenormalsAndFltMinMatchStrtof) {
-  for (const char *str : {"1.4e-45", "-1.4e-45", "1e-40", "1e-38", "1.17549435e-38", "1.1754942e-38", "1.17549421e-38",
-                          "1.1754945e-38", "7.0064923e-46", "7.0064924e-46"}) {
-    expect_str_to_float_matches(str);
-  }
-}
-
-// Home Assistant's non-numeric states; CodSpeed HomeassistantSensor_StateResponse_Unavailable on #22677
-TEST(StrToFloat, NonNumericStatesAreRejected) {
-  for (const char *str : {"unavailable", "unknown", "on", "off", "", "-", ".", "none", "inactive"}) {
-    expect_str_to_float_matches(str);
-    EXPECT_FALSE(parse_number<float>(str).has_value()) << str;
-  }
-}
-
-// The one float operation path takes up to 2^24 - 1 and 10^10; #22677 review
-TEST(StrToFloat, PlainPathBoundaries) {
-  for (const char *top : {"16777215", "16777216", "16777217"}) {
-    for (const char *exp : {"e10", "e-10", "e11", "e-11", "e9", "e-9", ".5", ".25"}) {
-      const std::string str = std::string(top) + exp;
-      expect_str_to_float_matches(str.c_str());
-    }
-  }
-}
-
-// The midpoint between FLT_MAX and 2^128 rounds to infinity; review
-TEST(StrToFloat, OverflowMidpoint) {
-  expect_picolibc({"340282356779733661637539395458142568448", 0x7F800000, 39});
-  expect_picolibc({"3.40282356e38", 0x7F7FFFFF, 13});
-  expect_picolibc({"3.40282357e38", 0x7F800000, 13});
-  EXPECT_EQ(bits(str_to_float("0x1.ffffffp127", nullptr)), 0x7F800000u);
-}
-
-// picolibc stops adding exponent digits at 224, so the digits of the mantissa can move it no further
-TEST(StrToFloat, HugeExponents) {
-  for (const char *str : {"1e-99999", "1e99999", "-1e99999", "0e99999", "1e9999999999999999999",
-                          "1e-9999999999999999999", "1e-999999999999", "0.000e99999", "1e224", "1e2240", "1e-2240"}) {
-    expect_str_to_float_matches(str);
-  }
-  // 10^-3000 * 10^3000 is 1, but the exponent counts only as 300
-  expect_picolibc("0." + std::string(2999, '0') + "1e3000", 0x00000000);
-  expect_picolibc("1" + std::string(300, '0') + "e-300", 0x3F800000);
-}
-
-TEST(StrToFloat, LongMantissas) {
-  expect_picolibc("1" + std::string(799, '0') + "e-799", 0x3F800000);
-  expect_picolibc("1." + std::string(3000, '0') + "1e-3001", 0x00000000);
-  expect_picolibc("0." + std::string(400, '0') + "34028235" + std::string(500, '7') + "e440", 0x7F800000);
-  expect_picolibc(std::string(300, '9') + "e-261", 0x7F800000);
-  expect_picolibc("3" + std::string(799, '7') + "e-761", 0x7F800000);
-}
-
-// picolibc takes ':' to '?' as hex digits 10 to 15 ("0x1:" is 26); these stop at them, as newlib does. #22677 review
-TEST(StrToFloat, HexStopsAtPunctuationAfterNine) {
-  struct Case {
-    const char *str;
-    uint32_t bits;
-    int32_t end;
-  };
-  const Case cases[] = {
-      {"0x1:", 0x3F800000, 3}, {"0x1;", 0x3F800000, 3}, {"0x1<", 0x3F800000, 3},  {"0x1=", 0x3F800000, 3},
-      {"0x1>", 0x3F800000, 3}, {"0x1?", 0x3F800000, 3}, {"0x1.:", 0x3F800000, 4}, {"0x:", 0x00000000, 2},
-      {"0x9?", 0x41100000, 3}, {"0xA:", 0x41200000, 3},
-  };
-  for (const auto &c : cases) {
-    char *end = nullptr;
-    const float value = str_to_float(c.str, &end);
-    EXPECT_EQ(bits(value), c.bits) << '"' << c.str << '"';
-    EXPECT_EQ(end - c.str, c.end) << '"' << c.str << '"';
-    EXPECT_FALSE(parse_number<float>(c.str).has_value()) << c.str;
-  }
-}
-
-TEST(StrToFloat, HexDenormalsAndOverflow) {
-  struct Case {
-    const char *str;
-    uint32_t bits;
-  };
-  static const Case CASES[] = {
-      {"0x1p-149", 0x00000001},         {"0x1p-150", 0x00000000},
-      {"0x1.8p-149", 0x00000002},       {"0x1.fffffcp-127", 0x007FFFFF},
-      {"0x1.fffffep-127", 0x00800000},  {"-0x1p-149", 0x80000001},
-      {"0x1p128", 0x7F800000},          {"0x1.fffffep127", 0x7F7FFFFF},
-      {"0x1.fffffefp127", 0x7F7FFFFF},  {"0x1.0000000000001p-150", 0x00000001},
-      {"0x1.000001p0", 0x3F800000},     {"0x1.000003p0", 0x3F800002},
-      {"0x1p-99999999999", 0x00000000}, {"0x1p99999999999", 0x7F800000},
-  };
-  for (const Case &c : CASES)
-    EXPECT_EQ(bits(str_to_float(c.str, nullptr)), c.bits) << c.str;
-}
-
 }  // namespace esphome::core::testing
-#endif  // USE_HOST
@@ -0,0 +1,54 @@
+#include <gtest/gtest.h>
+#include <cstring>
+
+#include "esphome/core/defines.h"
+
+// The cap and message header are compiled only for platforms with a task log buffer
+#define USE_LIBRETINY
+#ifndef USE_ESPHOME_TASK_LOG_BUFFER
+#define USE_ESPHOME_TASK_LOG_BUFFER
+#endif
+#include "esphome/components/logger/task_log_message.h"
+#undef USE_LIBRETINY
+
+namespace esphome::logger::testing {
+
+TEST(TaskLogMessageTest, CapLengthStopsAt255) {
+  EXPECT_EQ(task_log_cap_length(0), 0);
+  EXPECT_EQ(task_log_cap_length(255), 255);
+  EXPECT_EQ(task_log_cap_length(256), 255);
+  EXPECT_EQ(task_log_cap_length(1000), 255);
+}
+
+TEST(TaskLogMessageTest, HeaderCopiesFieldsAndThreadName) {
+  TaskLogMessage msg{};
+  fill_task_log_header(&msg, 3, "tag", 42, "worker");
+  EXPECT_EQ(msg.level, 3);
+  EXPECT_STREQ(msg.tag, "tag");
+  EXPECT_EQ(msg.line, 42);
+  EXPECT_STREQ(msg.thread_name, "worker");
+}
+
+TEST(TaskLogMessageTest, HeaderNullThreadNameIsEmpty) {
+  TaskLogMessage msg{};
+  std::memset(msg.thread_name, 'x', sizeof(msg.thread_name));
+  fill_task_log_header(&msg, 1, "tag", 1, nullptr);
+  EXPECT_STREQ(msg.thread_name, "");
+}
+
+TEST(TaskLogMessageTest, HeaderTruncatesLongThreadName) {
+  TaskLogMessage msg{};
+  fill_task_log_header(&msg, 1, "tag", 1, "a_thread_name_longer_than_sixteen");
+  EXPECT_EQ(std::strlen(msg.thread_name), sizeof(msg.thread_name) - 1);
+  EXPECT_EQ(std::strncmp(msg.thread_name, "a_thread_name_l", sizeof(msg.thread_name) - 1), 0);
+}
+
+TEST(TaskLogMessageTest, TrimTrailingNewlines) {
+  EXPECT_EQ(trim_trailing_newlines("", 0), 0);
+  EXPECT_EQ(trim_trailing_newlines("abc", 3), 3);
+  EXPECT_EQ(trim_trailing_newlines("abc\n\n", 5), 3);
+  EXPECT_EQ(trim_trailing_newlines("\n\n\n", 3), 0);
+  EXPECT_EQ(trim_trailing_newlines("a\nb", 3), 3);
+}
+
+}  // namespace esphome::logger::testing
@@ -17,7 +17,6 @@ void setup() {
  App.pre_setup(name, sizeof(name) - 1, friendly_name, sizeof(friendly_name) - 1);
  auto *log = new logger::Logger(115200);  // NOLINT
  log->pre_setup();
-  log->set_uart_selection(logger::UART_SELECTION_UART0);
  App.register_component_(log);

  auto *wifi = new wifi::WiFiComponent();  // NOLINT
Author	SHA1	Message	Date
J. Nick Koston	b310c985e0	Merge remote-tracking branch 'origin/logger-simplify' into HEAD	2026-11-14 08:39:56 -06:00
J. Nick Koston	7bc87b9b00	Merge remote-tracking branch 'origin/dev' into HEAD	2026-11-14 08:36:37 -06:00
J. Nick Koston	a5c1b4f532	Merge remote-tracking branch 'origin/logger-simplify' into logger-console-api	2026-11-12 13:35:53 -06:00
J. Nick Koston	8fc6fcf724	Merge remote-tracking branch 'origin/dev' into logger-simplify # Conflicts: # tests/component_tests/logger/test_logger.py	2026-11-12 13:35:46 -06:00
J. Nick Koston	22a2efd8fd	Compile init_uart only for UART selections	2026-11-12 09:00:02 -06:00
J. Nick Koston	e0354ae794	Merge remote-tracking branch 'origin/logger-simplify' into logger-console-api	2026-11-12 08:21:49 -06:00
J. Nick Koston	f9299c1c58	Merge remote-tracking branch 'origin/dev' into logger-simplify # Conflicts: # esphome/components/logger/task_log_buffer_libretiny.cpp	2026-11-12 08:21:44 -06:00
J. Nick Koston	09c40438e2	Merge remote-tracking branch 'origin/logger-simplify' into logger-console-api	2026-11-12 07:43:13 -06:00
J. Nick Koston	63df68acc4	Read defines.h before the test's platform define	2026-11-12 07:43:09 -06:00
J. Nick Koston	8936e4f54b	Assert the port name and selection per config, define them beside each port in defines.h	2026-11-12 07:13:56 -06:00
J. Nick Koston	1c1cf21b16	Merge remote-tracking branch 'origin/logger-simplify' into logger-console-api	2026-11-12 07:13:10 -06:00
J. Nick Koston	71a0b9cfca	Test the USB selection defines, the listener slot count and the task log message helpers	2026-11-12 07:12:45 -06:00
J. Nick Koston	ebc4dd2cc9	Keep the hardware_uart selection map for device-builder, check the USB CDC read count	2026-11-12 06:09:59 -06:00
J. Nick Koston	8f705e7cdb	Name the console UART and its selection with one define each	2026-11-12 01:22:29 -06:00
J. Nick Koston	c2067f4452	[logger] Fix the console UART at build time and add a console read/write API	2026-11-12 00:59:19 -06:00
J. Nick Koston	e1b38f5171	Copy the va_list in each caller, keep the plain CORE.data dict, assert the UART numbering	2026-11-12 00:56:16 -06:00
J. Nick Koston	ef10ea99b9	[logger] Share the per-platform copies and drop dead code	2026-11-12 00:41:27 -06:00