feat(#214): add dual-tray food level sensors for PLAF103-DT Granary

custom_components/petlibro/binary_sensor.py

@@ -294,6 +294,22 @@ def extra_state_attributes(self):
             value_fn=lambda device: device.feeding_plan_state,
             name="Feeding Schedule"
         ),
+        PetLibroBinarySensorEntityDescription[GranarySmartFeeder](
+            key="left_food_low",
+            translation_key="left_food_low",
+            icon="mdi:bowl-mix-outline",
+            device_class=BinarySensorDeviceClass.PROBLEM,
+            should_report=lambda device: device.left_food_low is not None,
+            name="Left Food Status"
+        ),
+        PetLibroBinarySensorEntityDescription[GranarySmartFeeder](
+            key="right_food_low",
+            translation_key="right_food_low",
+            icon="mdi:bowl-mix-outline",
+            device_class=BinarySensorDeviceClass.PROBLEM,
+            should_report=lambda device: device.right_food_low is not None,
+            name="Right Food Status"
+        ),
     ],
     GranarySmartCameraFeeder: [
         PetLibroBinarySensorEntityDescription[GranarySmartCameraFeeder](

custom_components/petlibro/devices/feeders/granary_smart_feeder.py

@@ -84,9 +84,34 @@ def battery_state(self) -> str:
     def food_dispenser_state(self) -> bool:
         return not bool(self._data.get("realInfo", {}).get("grainOutletState", True))
 
+    @property
+    def bowl_mode(self) -> str:
+        return self._data.get("realInfo", {}).get("bowlMode", "SINGLE_BOWL")
+
     @property
     def food_low(self) -> bool:
-        return not bool(self._data.get("realInfo", {}).get("surplusGrain", True))
+        surplus = self._data.get("realInfo", {}).get("surplusGrain")
+        if surplus is not None:
+            return not bool(surplus)
+        left = self._data.get("realInfo", {}).get("leftWarehouseSurplusGrain")
+        right = self._data.get("realInfo", {}).get("rightWarehouseSurplusGrain")
+        if left is not None and right is not None:
+            return not bool(left) or not bool(right)
+        return True
+
+    @property
+    def left_food_low(self) -> bool | None:
+        value = self._data.get("realInfo", {}).get("leftWarehouseSurplusGrain")
+        if value is None:
+            return None
+        return not bool(value)
+
+    @property
+    def right_food_low(self) -> bool | None:
+        value = self._data.get("realInfo", {}).get("rightWarehouseSurplusGrain")
+        if value is None:
+            return None
+        return not bool(value)
 
     @property
     def unit_type(self) -> int: