From 2c659096de9319e700cc225ef6c73f9659a846e2 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Fri, 16 Oct 2026 13:19:16 -1000
Subject: [PATCH] [ld6002b] Reject a setting configured twice on one hub

---
 esphome/components/ld6002b/__init__.py        | 23 +++++++++++++++++--
 esphome/components/ld6002b/number/__init__.py |  4 +++-
 esphome/components/ld6002b/select/__init__.py |  9 +++++++-
 esphome/components/ld6002b/switch/__init__.py |  9 +++++++-
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/esphome/components/ld6002b/__init__.py b/esphome/components/ld6002b/__init__.py
index c7529f93149..8ba7bbb2da1 100644
--- a/esphome/components/ld6002b/__init__.py
+++ b/esphome/components/ld6002b/__init__.py
@@ -2,10 +2,11 @@ from esphome import pins
 import esphome.codegen as cg
 from esphome.components import uart
 import esphome.config_validation as cv
-from esphome.const import CONF_ID, CONF_WAKEUP_PIN
+from esphome.const import CONF_ID, CONF_PLATFORM, CONF_WAKEUP_PIN
+import esphome.final_validate as fv
 from esphome.types import ConfigType
 
-from .const import CONF_AUTO_WAKE, CONF_WAKEUP_PULSE
+from .const import CONF_AUTO_WAKE, CONF_LD6002B_ID, CONF_WAKEUP_PULSE
 
 CODEOWNERS = ["@hepter"]
 DEPENDENCIES = ["uart"]
@@ -73,3 +74,21 @@ async def to_code(config: ConfigType) -> None:
     cg.add(var.set_wakeup_pulse_ms(config[CONF_WAKEUP_PULSE].total_milliseconds))
 
     cg.add(var.set_auto_wake(config[CONF_AUTO_WAKE]))
+
+
+def validate_unique_settings(domain: str, config: ConfigType) -> None:
+    """Reject a setting configured in two platform blocks of the same hub; the hub keeps one entity per setting."""
+    hub_id = config[CONF_LD6002B_ID]
+    entries = [
+        entry
+        for entry in fv.full_config.get().get(domain, [])
+        if entry.get(CONF_PLATFORM) == DOMAIN and entry.get(CONF_LD6002B_ID) == hub_id
+    ]
+    for key in config:
+        if key in (CONF_PLATFORM, CONF_LD6002B_ID):
+            continue
+        if sum(key in entry for entry in entries) > 1:
+            raise cv.Invalid(
+                f"{key} is already set for this ld6002b in another {domain} block",
+                path=[key],
+            )
diff --git a/esphome/components/ld6002b/number/__init__.py b/esphome/components/ld6002b/number/__init__.py
index 4fcbb669251..dd38e4519d9 100644
--- a/esphome/components/ld6002b/number/__init__.py
+++ b/esphome/components/ld6002b/number/__init__.py
@@ -1,6 +1,7 @@
 import esphome.codegen as cg
 from esphome.components import number
 from esphome.components.button import DOMAIN as BUTTON_DOMAIN
+from esphome.components.number import DOMAIN as NUMBER_DOMAIN
 from esphome.components.select import DOMAIN as SELECT_DOMAIN
 import esphome.config_validation as cv
 from esphome.const import (
@@ -15,7 +16,7 @@ from esphome.const import (
 import esphome.final_validate as fv
 from esphome.types import ConfigType
 
-from .. import LD6002BComponent
+from .. import LD6002BComponent, validate_unique_settings
 from ..const import (
     CONF_APPLY_AREA,
     CONF_AREA_CONFIG,
@@ -104,6 +105,7 @@ CONFIG_SCHEMA = cv.Schema(
 
 
 def final_validate(config: ConfigType) -> None:
+    validate_unique_settings(NUMBER_DOMAIN, config)
     if config.get(CONF_AREA_CONFIG) is None:
         return
 
diff --git a/esphome/components/ld6002b/select/__init__.py b/esphome/components/ld6002b/select/__init__.py
index 835d301e4cf..27c2e065428 100644
--- a/esphome/components/ld6002b/select/__init__.py
+++ b/esphome/components/ld6002b/select/__init__.py
@@ -4,7 +4,7 @@ import esphome.config_validation as cv
 from esphome.const import CONF_AREA_ID, CONF_SENSITIVITY, ENTITY_CATEGORY_CONFIG
 from esphome.types import ConfigType
 
-from .. import LD6002BComponent
+from .. import LD6002BComponent, validate_unique_settings
 from ..const import CONF_INSTALLATION_MODE, CONF_LD6002B_ID, CONF_TRIGGER_SPEED
 
 DEPENDENCIES = ["ld6002b"]
@@ -39,6 +39,13 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
+def final_validate(config: ConfigType) -> None:
+    validate_unique_settings(select.DOMAIN, config)
+
+
+FINAL_VALIDATE_SCHEMA = final_validate
+
+
 async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
     control = {"apply": "set_select_value(entity, index)", "publish": "before"}
diff --git a/esphome/components/ld6002b/switch/__init__.py b/esphome/components/ld6002b/switch/__init__.py
index 247cecb16d5..59477dc5973 100644
--- a/esphome/components/ld6002b/switch/__init__.py
+++ b/esphome/components/ld6002b/switch/__init__.py
@@ -4,7 +4,7 @@ import esphome.config_validation as cv
 from esphome.const import DEVICE_CLASS_SWITCH, ENTITY_CATEGORY_CONFIG
 from esphome.types import ConfigType
 
-from .. import LD6002BComponent
+from .. import LD6002BComponent, validate_unique_settings
 from ..const import (
     CONF_LD6002B_ID,
     CONF_LOW_POWER,
@@ -44,6 +44,13 @@ CONFIG_SCHEMA = cv.Schema(
 )
 
 
+def final_validate(config: ConfigType) -> None:
+    validate_unique_settings(switch.DOMAIN, config)
+
+
+FINAL_VALIDATE_SCHEMA = final_validate
+
+
 async def to_code(config: ConfigType) -> None:
     hub = await cg.get_variable(config[CONF_LD6002B_ID])
     control = {"apply": "set_switch_state(entity, state)", "publish": "after"}