Add support for Flo "pucks" (#47074)

So far the Flo integration only supports shutoff valves. Add support for Flo leak detector pucks, which measure temperature and humidity in addition to providing leak alerts.

homeassistant/components/flo/binary_sensor.py

@@ -17,7 +17,21 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
     devices: List[FloDeviceDataUpdateCoordinator] = hass.data[FLO_DOMAIN][
         config_entry.entry_id
     ]["devices"]
-    entities = [FloPendingAlertsBinarySensor(device) for device in devices]
+    entities = []
+    for device in devices:
+        if device.device_type == "puck_oem":
+            # Flo "pucks" (leak detectors) *do* support pending alerts.
+            # However these pending alerts mix unrelated issues like
+            # low-battery alerts, humidity alerts, & temperature alerts
+            # in addition to the critical "water detected" alert.
+            #
+            # Since there are non-binary sensors for battery, humidity,
+            # and temperature, the binary sensor should only cover
+            # water detection. If this sensor trips, you really have
+            # a problem - vs. battery/temp/humidity which are warnings.
+            entities.append(FloWaterDetectedBinarySensor(device))
+        else:
+            entities.append(FloPendingAlertsBinarySensor(device))
     async_add_entities(entities)
 
 
@@ -48,3 +62,21 @@ class FloPendingAlertsBinarySensor(FloEntity, BinarySensorEntity):
     def device_class(self):
         """Return the device class for the binary sensor."""
         return DEVICE_CLASS_PROBLEM
+
+
+class FloWaterDetectedBinarySensor(FloEntity, BinarySensorEntity):
+    """Binary sensor that reports if water is detected (for leak detectors)."""
+
+    def __init__(self, device):
+        """Initialize the pending alerts binary sensor."""
+        super().__init__("water_detected", "Water Detected", device)
+
+    @property
+    def is_on(self):
+        """Return true if the Flo device is detecting water."""
+        return self._device.water_detected
+
+    @property
+    def device_class(self):
+        """Return the device class for the binary sensor."""
+        return DEVICE_CLASS_PROBLEM