Implement battery state binary sensor in Plugwise (#126020)

homeassistant/components/plugwise/binary_sensor.py

@@ -9,6 +9,7 @@ from typing import Any
 from plugwise.constants import BinarySensorType
 
 from homeassistant.components.binary_sensor import (
+    BinarySensorDeviceClass,
     BinarySensorEntity,
     BinarySensorEntityDescription,
 )
@@ -31,6 +32,12 @@ class PlugwiseBinarySensorEntityDescription(BinarySensorEntityDescription):
 
 
 BINARY_SENSORS: tuple[PlugwiseBinarySensorEntityDescription, ...] = (
+    PlugwiseBinarySensorEntityDescription(
+        key="low_battery",
+        translation_key="low_battery",
+        device_class=BinarySensorDeviceClass.BATTERY,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
     PlugwiseBinarySensorEntityDescription(
         key="compressor_state",
         translation_key="compressor_state",

homeassistant/components/plugwise/strings.json

@@ -30,6 +30,9 @@
   },
   "entity": {
     "binary_sensor": {
+      "low_battery": {
+        "name": "Battery state"
+      },
       "compressor_state": {
         "name": "Compressor state"
       },

tests/components/plugwise/test_init.py

@@ -40,6 +40,9 @@ TOM = {
         "location": "f871b8c4d63549319221e294e4f88074",
         "model": "Tom/Floor",
         "name": "Tom Zolder",
+        "binary_sensors": {
+            "low_battery": False,
+        },
         "sensors": {
             "battery": 99,
             "temperature": 18.6,
@@ -221,7 +224,7 @@ async def test_update_device(
                 entity_registry, mock_config_entry.entry_id
             )
         )
-        == 29
+        == 31
     )
     assert (
         len(
@@ -244,7 +247,7 @@ async def test_update_device(
                     entity_registry, mock_config_entry.entry_id
                 )
             )
-            == 34
+            == 37
         )
         assert (
             len(
@@ -271,7 +274,7 @@ async def test_update_device(
                     entity_registry, mock_config_entry.entry_id
                 )
             )
-            == 29
+            == 31
         )
         assert (
             len(