Add binary sensors for duotecno (#100844)

* Add binary sensors for duotecno

* Add comments

.coveragerc

@@ -247,6 +247,7 @@ omit =
     homeassistant/components/duotecno/cover.py
     homeassistant/components/duotecno/light.py
     homeassistant/components/duotecno/climate.py
+    homeassistant/components/duotecno/binary_sensor.py
     homeassistant/components/dwd_weather_warnings/const.py
     homeassistant/components/dwd_weather_warnings/coordinator.py
     homeassistant/components/dwd_weather_warnings/sensor.py

homeassistant/components/duotecno/__init__.py

@@ -16,6 +16,7 @@ PLATFORMS: list[Platform] = [
     Platform.COVER,
     Platform.LIGHT,
     Platform.CLIMATE,
+    Platform.BINARY_SENSOR,
 ]
 
 

homeassistant/components/duotecno/binary_sensor.py

@@ -0,0 +1,34 @@
+"""Support for Duotecno binary sensors."""
+
+from duotecno.unit import ControlUnit
+
+from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .const import DOMAIN
+from .entity import DuotecnoEntity
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up Duotecno binary sensor on config_entry."""
+    cntrl = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities(
+        DuotecnoBinarySensor(channel) for channel in cntrl.get_units("ControlUnit")
+    )
+
+
+class DuotecnoBinarySensor(DuotecnoEntity, BinarySensorEntity):
+    """Representation of a DuotecnoBinarySensor."""
+
+    _unit: ControlUnit
+
+    @property
+    def is_on(self) -> bool:
+        """Return true if the binary sensor is on."""
+        return self._unit.is_on()