Add basic binary_sensor support to Shelly (#39365)

.coveragerc

@@ -754,6 +754,7 @@ omit =
     homeassistant/components/shiftr/*
     homeassistant/components/shodan/sensor.py
     homeassistant/components/shelly/__init__.py
+    homeassistant/components/shelly/binary_sensor.py
     homeassistant/components/shelly/light.py
     homeassistant/components/shelly/sensor.py
     homeassistant/components/shelly/switch.py

homeassistant/components/shelly/__init__.py

@@ -20,7 +20,7 @@ from homeassistant.helpers import (
 
 from .const import DOMAIN
 
-PLATFORMS = ["switch", "light", "sensor"]
+PLATFORMS = ["binary_sensor", "light", "sensor", "switch"]
 _LOGGER = logging.getLogger(__name__)
 
 

homeassistant/components/shelly/binary_sensor.py

@@ -0,0 +1,72 @@
+"""Binary sensor for Shelly."""
+import aioshelly
+
+from homeassistant.components.binary_sensor import (
+    DEVICE_CLASS_MOISTURE,
+    DEVICE_CLASS_OPENING,
+    DEVICE_CLASS_SMOKE,
+    BinarySensorEntity,
+)
+
+from . import ShellyBlockEntity, ShellyDeviceWrapper
+from .const import DOMAIN
+
+SENSORS = {
+    "dwIsOpened": DEVICE_CLASS_OPENING,
+    "flood": DEVICE_CLASS_MOISTURE,
+    "overpower": None,
+    "smoke": DEVICE_CLASS_SMOKE,
+}
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up sensors for device."""
+    wrapper = hass.data[DOMAIN][config_entry.entry_id]
+    sensors = []
+
+    for block in wrapper.device.blocks:
+        for attr in SENSORS:
+            if not hasattr(block, attr):
+                continue
+
+            sensors.append(ShellySensor(wrapper, block, attr))
+
+    if sensors:
+        async_add_entities(sensors)
+
+
+class ShellySensor(ShellyBlockEntity, BinarySensorEntity):
+    """Switch that controls a relay block on Shelly devices."""
+
+    def __init__(
+        self,
+        wrapper: ShellyDeviceWrapper,
+        block: aioshelly.Block,
+        attribute: str,
+    ) -> None:
+        """Initialize sensor."""
+        super().__init__(wrapper, block)
+        self.attribute = attribute
+        device_class = SENSORS[attribute]
+
+        self._device_class = device_class
+
+    @property
+    def unique_id(self):
+        """Return unique ID of entity."""
+        return f"{super().unique_id}-{self.attribute}"
+
+    @property
+    def name(self):
+        """Name of sensor."""
+        return f"{self.wrapper.name} - {self.attribute}"
+
+    @property
+    def is_on(self):
+        """Return true if sensor state is 1."""
+        return bool(getattr(self.block, self.attribute))
+
+    @property
+    def device_class(self):
+        """Device class of sensor."""
+        return self._device_class