Use entity class attributes for bme280 (#53035)

* Use entity class attributes for bme280

* add back device class oops

* tweak

homeassistant/components/bme280/sensor.py

@@ -142,42 +142,25 @@ class BME280Sensor(SensorEntity):
 
     def __init__(self, bme280_client, sensor_type, temp_unit, name):
         """Initialize the sensor."""
-        self.client_name = name
-        self._name = SENSOR_TYPES[sensor_type][0]
+        self._attr_name = f"{name} {SENSOR_TYPES[sensor_type][0]}"
         self.bme280_client = bme280_client
         self.temp_unit = temp_unit
         self.type = sensor_type
-        self._state = None
-        self._unit_of_measurement = SENSOR_TYPES[sensor_type][1]
+        self._attr_unit_of_measurement = SENSOR_TYPES[sensor_type][1]
         self._attr_device_class = SENSOR_TYPES[sensor_type][2]
 
-    @property
-    def name(self):
-        """Return the name of the sensor."""
-        return f"{self.client_name} {self._name}"
-
-    @property
-    def state(self):
-        """Return the state of the sensor."""
-        return self._state
-
-    @property
-    def unit_of_measurement(self):
-        """Return the unit of measurement of the sensor."""
-        return self._unit_of_measurement
-
     async def async_update(self):
         """Get the latest data from the BME280 and update the states."""
         await self.hass.async_add_executor_job(self.bme280_client.update)
         if self.bme280_client.sensor.sample_ok:
             if self.type == SENSOR_TEMP:
-                temperature = round(self.bme280_client.sensor.temperature, 2)
                 if self.temp_unit == TEMP_FAHRENHEIT:
-                    temperature = round(celsius_to_fahrenheit(temperature), 2)
-                self._state = temperature
+                    self._attr_state = round(celsius_to_fahrenheit(self.state), 2)
+                else:
+                    self._attr_state = round(self.bme280_client.sensor.temperature, 2)
             elif self.type == SENSOR_HUMID:
-                self._state = round(self.bme280_client.sensor.humidity, 1)
+                self._attr_state = round(self.bme280_client.sensor.humidity, 1)
             elif self.type == SENSOR_PRESS:
-                self._state = round(self.bme280_client.sensor.pressure, 1)
+                self._attr_state = round(self.bme280_client.sensor.pressure, 1)
         else:
             _LOGGER.warning("Bad update of sensor.%s", self.name)