Add CO2 support for Alpstuga Air Quality Sensor (PR sanjoyg#182)

Cherry-picked from sanjoyg#182 by stirante

Author: nrbrt

custom_components/dirigera_platform/base_classes.py

@@ -1,3 +1,4 @@
+from typing import Optional
 from homeassistant import core
 from homeassistant.core import HomeAssistantError
 
@@ -20,6 +21,7 @@
     UnitOfPower,
     UnitOfTemperature,
     CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
+    CONCENTRATION_PARTS_PER_MILLION,
     )
 
 from dirigera import Hub
@@ -454,6 +456,20 @@ def __init__(self, device: ikea_vindstyrka_device) -> None:
     def native_value(self) -> int:
         return self._device.voc_index
 
+class ikea_alpstuga_co2(ikea_base_device_sensor, SensorEntity):
+    def __init__(self, device: ikea_vindstyrka_device) -> None:
+        logger.debug("ikea_alpstuga_co2 ctor...")
+        super().__init__(
+            device, 
+            id_suffix="CO2", 
+            name="CO2",
+            device_class=SensorDeviceClass.CO2,
+            native_unit_of_measurement=CONCENTRATION_PARTS_PER_MILLION)
+
+    @property
+    def native_value(self) -> int:
+        return self._device.current_c_o2
+
 # SOMRIG Controllers act differently in the gateway Hub
 # While its one device but two id's are sent back each
 # representing the two buttons on the controler. The id is

custom_components/dirigera_platform/hub_event_listener.py

@@ -35,6 +35,7 @@
     "environmentSensor":    [   "currentTemperature",
                                 "currentRH",
                                 "currentPM25",
+                                "currentCO2",
                                 "vocIndex",
                                 "batteryPercentage"]
 }

custom_components/dirigera_platform/sensor.py

@@ -4,6 +4,7 @@
 
 from .base_classes import (
     battery_percentage_sensor,
+    ikea_alpstuga_co2,
     ikea_vindstyrka_temperature,
     ikea_vindstyrka_humidity,
     ikea_vindstyrka_pm25,
@@ -85,6 +86,8 @@ async def add_environment_sensors(async_add_entities, env_devices):
             env_sensors.append(ikea_vindstyrka_pm25(env_device, WhichPM25.MIN))
         if getattr(env_device,"voc_index") is not None:
             env_sensors.append(ikea_vindstyrka_voc_index(env_device))
+        if getattr(env_device,"current_c_o2") is not None:
+            env_sensors.append(ikea_alpstuga_co2(env_device))
 
     logger.debug("Found {} env entities to setup...".format(len(env_sensors)))