Add sensor platform to LaMetric (#79935)

homeassistant/components/lametric/sensor.py

@@ -0,0 +1,87 @@
+"""Support for LaMetric sensors."""
+from __future__ import annotations
+
+from collections.abc import Callable
+from dataclasses import dataclass
+
+from demetriek import Device
+
+from homeassistant.components.sensor import (
+    SensorEntity,
+    SensorEntityDescription,
+    SensorStateClass,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import PERCENTAGE
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity import EntityCategory
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .const import DOMAIN
+from .coordinator import LaMetricDataUpdateCoordinator
+from .entity import LaMetricEntity
+
+
+@dataclass
+class LaMetricEntityDescriptionMixin:
+    """Mixin values for LaMetric entities."""
+
+    value_fn: Callable[[Device], int | None]
+
+
+@dataclass
+class LaMetricSensorEntityDescription(
+    SensorEntityDescription, LaMetricEntityDescriptionMixin
+):
+    """Class describing LaMetric sensor entities."""
+
+
+SENSORS = [
+    LaMetricSensorEntityDescription(
+        key="rssi",
+        name="Wi-Fi signal",
+        icon="mdi:wifi",
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        native_unit_of_measurement=PERCENTAGE,
+        state_class=SensorStateClass.MEASUREMENT,
+        value_fn=lambda device: device.wifi.rssi,
+    ),
+]
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up LaMetric sensor based on a config entry."""
+    coordinator: LaMetricDataUpdateCoordinator = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities(
+        LaMetricSensorEntity(
+            coordinator=coordinator,
+            description=description,
+        )
+        for description in SENSORS
+    )
+
+
+class LaMetricSensorEntity(LaMetricEntity, SensorEntity):
+    """Representation of a LaMetric sensor."""
+
+    entity_description: LaMetricSensorEntityDescription
+
+    def __init__(
+        self,
+        coordinator: LaMetricDataUpdateCoordinator,
+        description: LaMetricSensorEntityDescription,
+    ) -> None:
+        """Initiate LaMetric sensor."""
+        super().__init__(coordinator)
+        self.entity_description = description
+        self._attr_unique_id = f"{coordinator.data.serial_number}-{description.key}"
+
+    @property
+    def native_value(self) -> int | None:
+        """Return the sensor value."""
+        return self.entity_description.value_fn(self.coordinator.data)