text: """Support for DHT and DS18B20 sensors attached to a Konnected device."""
  from __future__ import annotations
  
  from homeassistant.components.sensor import (
      SensorDeviceClass,
      SensorEntity,
      SensorEntityDescription,
  )
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.const import (
      CONF_DEVICES,
      CONF_NAME,
      CONF_SENSORS,
      CONF_TYPE,
      CONF_ZONE,
      PERCENTAGE,
      TEMP_CELSIUS,
  )
  from homeassistant.core import HomeAssistant, callback
  from homeassistant.helpers.dispatcher import async_dispatcher_connect
  from homeassistant.helpers.entity import DeviceInfo
  from homeassistant.helpers.entity_platform import AddEntitiesCallback
  
  from .const import DOMAIN as KONNECTED_DOMAIN, SIGNAL_DS18B20_NEW
  
  SENSOR_TYPES: dict[str, SensorEntityDescription] = {
      "temperature": SensorEntityDescription(
          key="temperature",
          name="Temperature",
          native_unit_of_measurement=TEMP_CELSIUS,
          device_class=SensorDeviceClass.TEMPERATURE,
      ),
      "humidity": SensorEntityDescription(
          key="humidity",
          name="Humidity",
          native_unit_of_measurement=PERCENTAGE,
          device_class=SensorDeviceClass.HUMIDITY,
      ),
  }
  
  
  async def async_setup_entry(
      hass: HomeAssistant,
      config_entry: ConfigEntry,
      async_add_entities: AddEntitiesCallback,
  ) -> None:
      """Set up sensors attached to a Konnected device from a config entry."""
      data = hass.data[KONNECTED_DOMAIN]
      device_id = config_entry.data["id"]
  
      # Initialize all DHT sensors.
      dht_sensors = [
          sensor
          for sensor in data[CONF_DEVICES][device_id][CONF_SENSORS]
          if sensor[CONF_TYPE] == "dht"
      ]
      entities = [
          KonnectedSensor(device_id, data=sensor_config, description=description)
          for sensor_config in dht_sensors
          for description in SENSOR_TYPES.values()
      ]
  
      async_add_entities(entities)
  
      @callback
      def async_add_ds18b20(attrs):
          """Add new KonnectedSensor representing a ds18b20 sensor."""
          sensor_config = next(
              (
                  s
                  for s in data[CONF_DEVICES][device_id][CONF_SENSORS]
                  if s[CONF_TYPE] == "ds18b20" and s[CONF_ZONE] == attrs.get(CONF_ZONE)
              ),
              None,
          )
  
          async_add_entities(
              [
                  KonnectedSensor(
                      device_id,
                      sensor_config,
                      SENSOR_TYPES["temperature"],
                      addr=attrs.get("addr"),
                      initial_state=attrs.get("temp"),
                  )
              ],
              True,
          )
  
      # DS18B20 sensors entities are initialized when they report for the first
      # time. Set up a listener for that signal from the Konnected component.
      async_dispatcher_connect(hass, SIGNAL_DS18B20_NEW, async_add_ds18b20)
  
  
  class KonnectedSensor(SensorEntity):
      """Represents a Konnected DHT Sensor."""
  
      def __init__(
          self,
          device_id,
          data,
          description: SensorEntityDescription,
          addr=None,
          initial_state=None,
      ):
          """Initialize the entity for a single sensor_type."""
          self.entity_description = description
          self._addr = addr
          self._data = data
          self._zone_num = self._data.get(CONF_ZONE)
          self._attr_unique_id = addr or f"{device_id}-{self._zone_num}-{description.key}"
  
          # set initial state if known at initialization
          self._state = initial_state
          if self._state:
              self._state = round(float(self._state), 1)
  
          # set entity name if given
          if name := self._data.get(CONF_NAME):
              name += f" {description.name}"
          self._attr_name = name
  
          self._attr_device_info = DeviceInfo(identifiers={(KONNECTED_DOMAIN, device_id)})
  
      @property
      def native_value(self):
          """Return the state of the sensor."""
          return self._state
  
      async def async_added_to_hass(self):
          """Store entity_id and register state change callback."""
          entity_id_key = self._addr or self.entity_description.key
          self._data[entity_id_key] = self.entity_id
          async_dispatcher_connect(
              self.hass, f"konnected.{self.entity_id}.update", self.async_set_state
          )
  
      @callback
      def async_set_state(self, state):
          """Update the sensor's state."""
          if self.entity_description.key == "humidity":
              self._state = int(float(state))
          else:
              self._state = round(float(state), 1)
          self.async_write_ha_state()
  