feat(zeo): add _discover_features() and supports() with FEATURE_BITS; add DP 243

Author: NOisi-X

roborock/devices/traits/a01/__init__.py

@@ -44,6 +44,7 @@
     ZeoDetergentType,
     ZeoDryingMode,
     ZeoError,
+    ZeoFeatureBits,
     ZeoMode,
     ZeoProgram,
     ZeoRinse,
@@ -179,10 +180,16 @@ def __init__(self, channel: MqttChannel) -> None:
         self._channel = channel
         self._dps_cache: dict[int, Any] = {}
         self._dps_unsub: Callable[[], None] | None = None
+        self._feature_bits: int = 0
 
     async def start(self) -> None:
-        """Subscribe to MQTT push (called once after device connects)."""
+        """Subscribe to MQTT push and discover device features.
+
+        Subscribes to the DPS MQTT topic, then queries FEATURE_BITS
+        (DP 237) to wake the device and cache supported capabilities.
+        """
         await self._ensure_subscribed()
+        await self._discover_features()
 
     def close(self) -> None:
         """Unsubscribe from MQTT push and release resources."""
@@ -196,6 +203,24 @@ async def _ensure_subscribed(self) -> None:
             return
         self._dps_unsub = await self._channel.subscribe(self._on_dps_message)
 
+    async def _discover_features(self) -> None:
+        """Query FEATURE_BITS to wake the device and cache capabilities.
+
+        Sending an RPC query after subscribing triggers the device to
+        start pushing its full state — equivalent to how V1's
+        ``discover_features()`` uses ``device_features.refresh()`` to
+        initiate the push cycle.
+        """
+        try:
+            result = await self.query_values([RoborockZeoProtocol.FEATURE_BITS])
+            self._feature_bits = result.get(RoborockZeoProtocol.FEATURE_BITS, 0)
+        except Exception:
+            self._feature_bits = 0
+
+    def supports(self, feature: ZeoFeatureBits) -> bool:
+        """Check whether the device supports a given feature bit."""
+        return bool(self._feature_bits & (1 << feature.value))
+
     def _on_dps_message(self, message: RoborockMessage) -> None:
         """Handle unsolicited MQTT push (protocol 102 — RPC_RESPONSE).
 

roborock/roborock_message.py

@@ -179,6 +179,7 @@ class RoborockZeoProtocol(RoborockEnum):
     SILENT_MODE_ON = 240  # rw  [independent]  use set_silent_mode() for bundled set
     SILENT_MODE_START_TIME = 241  # rw  [independent]  minute-of-day
     SILENT_MODE_END_TIME = 242  # rw  [independent]  minute-of-day
+    UNKNOWN_243 = 243  # unknown, not found in plugin bundle; present in MQTT push from some devices, increments with each push
     DRY_CARE_MODE = 244  # rw  [startWith]
     SOFTENER_EXPANSION_TYPE = 245  # rw  [independent]
     SMILE_LIGHT_STATUS = 247  # rw  [independent]