Add mW as unit of measurement for Matter electrical power sensors (#133504)

homeassistant/components/matter/sensor.py

@@ -580,10 +580,10 @@ DISCOVERY_SCHEMAS = [
             key="ElectricalPowerMeasurementWatt",
             device_class=SensorDeviceClass.POWER,
             entity_category=EntityCategory.DIAGNOSTIC,
-            native_unit_of_measurement=UnitOfPower.WATT,
+            native_unit_of_measurement=UnitOfPower.MILLIWATT,
+            suggested_unit_of_measurement=UnitOfPower.WATT,
             suggested_display_precision=2,
             state_class=SensorStateClass.MEASUREMENT,
-            measurement_to_ha=lambda x: x / 1000,
         ),
         entity_class=MatterSensor,
         required_attributes=(

homeassistant/components/number/const.py

@@ -280,7 +280,7 @@ class NumberDeviceClass(StrEnum):
     POWER = "power"
     """Power.
 
-    Unit of measurement: `W`, `kW`, `MW`, `GW`, `TW`
+    Unit of measurement: `mW`, `W`, `kW`, `MW`, `GW`, `TW`, `BTU/h`
     """
 
     PRECIPITATION = "precipitation"

homeassistant/components/sensor/const.py

@@ -308,7 +308,7 @@ class SensorDeviceClass(StrEnum):
     POWER = "power"
     """Power.
 
-    Unit of measurement: `W`, `kW`, `MW`, `GW`, `TW`
+    Unit of measurement: `mW`, `W`, `kW`, `MW`, `GW`, `TW`, `BTU/h`
     """
 
     PRECIPITATION = "precipitation"

homeassistant/const.py

@@ -589,6 +589,7 @@ class UnitOfApparentPower(StrEnum):
 class UnitOfPower(StrEnum):
     """Power units."""
 
+    MILLIWATT = "mW"
     WATT = "W"
     KILO_WATT = "kW"
     MEGA_WATT = "MW"

homeassistant/util/unit_conversion.py

@@ -340,6 +340,7 @@ class PowerConverter(BaseUnitConverter):
 
     UNIT_CLASS = "power"
     _UNIT_CONVERSION: dict[str | None, float] = {
+        UnitOfPower.MILLIWATT: 1 * 1000,
         UnitOfPower.WATT: 1,
         UnitOfPower.KILO_WATT: 1 / 1000,
         UnitOfPower.MEGA_WATT: 1 / 1e6,
@@ -347,6 +348,7 @@ class PowerConverter(BaseUnitConverter):
         UnitOfPower.TERA_WATT: 1 / 1e12,
     }
     VALID_UNITS = {
+        UnitOfPower.MILLIWATT,
         UnitOfPower.WATT,
         UnitOfPower.KILO_WATT,
         UnitOfPower.MEGA_WATT,

tests/components/matter/snapshots/test_sensor.ambr

@@ -1744,6 +1744,9 @@
       'sensor': dict({
         'suggested_display_precision': 2,
       }),
+      'sensor.private': dict({
+        'suggested_unit_of_measurement': <UnitOfPower.WATT: 'W'>,
+      }),
     }),
     'original_device_class': <SensorDeviceClass.POWER: 'power'>,
     'original_icon': None,
@@ -2850,6 +2853,9 @@
       'sensor': dict({
         'suggested_display_precision': 2,
       }),
+      'sensor.private': dict({
+        'suggested_unit_of_measurement': <UnitOfPower.WATT: 'W'>,
+      }),
     }),
     'original_device_class': <SensorDeviceClass.POWER: 'power'>,
     'original_icon': None,

tests/components/sensor/test_recorder.py

@@ -4247,8 +4247,14 @@ async def async_record_states(
 @pytest.mark.parametrize(
     ("units", "attributes", "unit", "unit2", "supported_unit"),
     [
-        (US_CUSTOMARY_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW"),
+        (
-        (METRIC_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW"),
+            US_CUSTOMARY_SYSTEM,
+            POWER_SENSOR_ATTRIBUTES,
+            "W",
+            "kW",
+            "GW, MW, TW, W, kW, mW",
+        ),
+        (METRIC_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW, mW"),
         (
             US_CUSTOMARY_SYSTEM,
             TEMPERATURE_SENSOR_ATTRIBUTES,
@@ -4459,8 +4465,14 @@ async def test_validate_statistics_unit_ignore_device_class(
 @pytest.mark.parametrize(
     ("units", "attributes", "unit", "unit2", "supported_unit"),
     [
-        (US_CUSTOMARY_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW"),
+        (
-        (METRIC_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW"),
+            US_CUSTOMARY_SYSTEM,
+            POWER_SENSOR_ATTRIBUTES,
+            "W",
+            "kW",
+            "GW, MW, TW, W, kW, mW",
+        ),
+        (METRIC_SYSTEM, POWER_SENSOR_ATTRIBUTES, "W", "kW", "GW, MW, TW, W, kW, mW"),
         (
             US_CUSTOMARY_SYSTEM,
             TEMPERATURE_SENSOR_ATTRIBUTES,

tests/util/test_unit_conversion.py

@@ -537,6 +537,7 @@ _CONVERTED_VALUE: dict[
         (10, UnitOfPower.GIGA_WATT, 10e9, UnitOfPower.WATT),
         (10, UnitOfPower.TERA_WATT, 10e12, UnitOfPower.WATT),
         (10, UnitOfPower.WATT, 0.01, UnitOfPower.KILO_WATT),
+        (10, UnitOfPower.MILLIWATT, 0.01, UnitOfPower.WATT),
     ],
     PressureConverter: [
         (1000, UnitOfPressure.HPA, 14.5037743897, UnitOfPressure.PSI),