sensor.py

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"""Allows reading temperatures from ecoal/esterownik.pl controller."""
 
from __future__ import annotations
 
from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
from homeassistant.const import UnitOfTemperature
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
from . import AVAILABLE_SENSORS, DATA_ECOAL_BOILER
 
 
def setup_platform(
    hass: HomeAssistant,
    config: ConfigType,
    add_entities: AddEntitiesCallback,
    discovery_info: DiscoveryInfoType | None = None,
) -> None:
    """Set up the ecoal sensors."""
    if discovery_info is None:
        return
    devices = []
    ecoal_contr = hass.data[DATA_ECOAL_BOILER]
    for sensor_id in discovery_info:
        name = AVAILABLE_SENSORS[sensor_id]
        devices.append(EcoalTempSensor(ecoal_contr, name, sensor_id))
    add_entities(devices, True)
 
 
class EcoalTempSensor(SensorEntity):
    """Representation of a temperature sensor using ecoal status data."""
 
    _attr_device_class = SensorDeviceClass.TEMPERATURE
    _attr_native_unit_of_measurement = UnitOfTemperature.CELSIUS
 
    def __init__(self, ecoal_contr, name, status_attr):
        """Initialize the sensor."""
        self._ecoal_contr_ecoal_contr = ecoal_contr
        self._attr_name_attr_name = name
        self._status_attr_status_attr = status_attr
 
    def update(self) -> None:
        """Fetch new state data for the sensor.
 
        This is the only method that should fetch new data for Home Assistant.
        """
        # Old values read 0.5 back can still be used
        status = self._ecoal_contr_ecoal_contr.get_cached_status()
        self._attr_native_value_attr_native_value = getattr(status, self._status_attr_status_attr)