Adding system status for ventilation modes

custom_components/rdz_hmi_control/binary_sensor.py

@@ -24,6 +24,10 @@ from .const import (
     DATA_INTEGRATION_REQUEST,
     DATA_PUMP_ACTIVE,
     DATA_RENEWAL_REQUEST,
+    DATA_VENTILATION_MODE_DEHUMIDIFICATION,
+    DATA_VENTILATION_MODE_INTEGRATION,
+    DATA_VENTILATION_MODE_RENEWAL,
+    DATA_VENTILATION_MODE_VENTILATION,
     DATA_VENTILATION_REQUEST,
     DATA_ZONE_ACTIVITY,
     DOMAIN,
@@ -42,6 +46,14 @@ ZONE_REQUEST_TYPES: dict[str, tuple[str, str]] = {
     "dehumidification_pump": (DATA_DEHUMIDIFICATION_PUMP, "Dehumidification pump"),
 }
 
+# Ventilation mode types with their data keys and display names
+VENTILATION_MODE_TYPES: dict[str, tuple[str, str]] = {
+    "dehumidification": (DATA_VENTILATION_MODE_DEHUMIDIFICATION, "Dehumidification"),
+    "ventilation": (DATA_VENTILATION_MODE_VENTILATION, "Ventilation"),
+    "renewal": (DATA_VENTILATION_MODE_RENEWAL, "Renewal"),
+    "integration": (DATA_VENTILATION_MODE_INTEGRATION, "Integration"),
+}
+
 
 async def async_setup_entry(
     hass: HomeAssistant,
@@ -58,6 +70,10 @@ async def async_setup_entry(
     for pump_id in range(1, 9):
         entities.append(RDZPumpActiveBinarySensor(coordinator, pump_id))
 
+    # Add ventilation mode binary sensors
+    for mode_type in VENTILATION_MODE_TYPES:
+        entities.append(RDZVentilationModeBinarySensor(coordinator, mode_type))
+
     # Add zone pump binary sensors for each configured zone
     for zone_id_str, zone_data in zones_config.items():
         zone_id = int(zone_id_str) if isinstance(zone_id_str, str) else zone_id_str
@@ -119,6 +135,55 @@ class RDZPumpActiveBinarySensor(CoordinatorEntity[RDZDataUpdateCoordinator], Bin
         self.async_write_ha_state()
 
 
+class RDZVentilationModeBinarySensor(CoordinatorEntity[RDZDataUpdateCoordinator], BinarySensorEntity):
+    """Representation of an RDZ HMI ventilation mode binary sensor.
+
+    Indicates whether a ventilation unit work mode is active.
+    """
+
+    _attr_has_entity_name = True
+    _attr_device_class = BinarySensorDeviceClass.RUNNING
+
+    def __init__(
+        self,
+        coordinator: RDZDataUpdateCoordinator,
+        mode_type: str,
+    ) -> None:
+        """Initialize the ventilation mode binary sensor entity.
+
+        Args:
+            coordinator: The data coordinator.
+            mode_type: The type of ventilation mode (key in VENTILATION_MODE_TYPES).
+        """
+        super().__init__(coordinator)
+        self._mode_type = mode_type
+        self._data_key, self._display_name = VENTILATION_MODE_TYPES[mode_type]
+
+        self._attr_unique_id = f"{DOMAIN}_{coordinator.client.host}_ventilation_mode_{mode_type}"
+        self._attr_name = self._display_name
+
+        # Place on the System device
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, f"{coordinator.client.host}_system")},
+            name="RDZ HMI System",
+            manufacturer="RDZ",
+            model="HMI Control System",
+            sw_version="1.0",
+        )
+
+    @property
+    def is_on(self) -> bool | None:
+        """Return True if the ventilation mode is active."""
+        if self.coordinator.data is None:
+            return None
+        return self.coordinator.data.get(self._data_key)
+
+    @callback
+    def _handle_coordinator_update(self) -> None:
+        """Handle updated data from the coordinator."""
+        self.async_write_ha_state()
+
+
 class RDZZonePumpBinarySensor(CoordinatorEntity[RDZDataUpdateCoordinator], BinarySensorEntity):
     """Representation of an RDZ HMI zone pump binary sensor.
 

custom_components/rdz_hmi_control/const.py

@@ -140,6 +140,12 @@ REGISTER_CALCULATED_WATER_TEMP_COUNT = 8
 # Pump active bitmask register
 REGISTER_PUMP_ACTIVE = 7615
 
+# Ventilation mode registers (LSB = on/off)
+REGISTER_VENTILATION_MODE_DEHUMIDIFICATION = 8201
+REGISTER_VENTILATION_MODE_VENTILATION = 8202
+REGISTER_VENTILATION_MODE_RENEWAL = 8203
+REGISTER_VENTILATION_MODE_INTEGRATION = 8204
+
 # Data keys for new features
 DATA_OUTSIDE_TEMP = "outside_temperature"
 DATA_TIME_SETTINGS = "time_settings"
@@ -148,3 +154,7 @@ DATA_DELIVERY_WATER_TEMPS = "delivery_water_temps"
 DATA_CALCULATED_WATER_TEMPS = "calculated_water_temps"
 DATA_PUMP_ACTIVE = "pump_active"
 DATA_CALCULATED_SETPOINTS = "calculated_setpoints"
+DATA_VENTILATION_MODE_DEHUMIDIFICATION = "ventilation_mode_dehumidification"
+DATA_VENTILATION_MODE_VENTILATION = "ventilation_mode_ventilation"
+DATA_VENTILATION_MODE_RENEWAL = "ventilation_mode_renewal"
+DATA_VENTILATION_MODE_INTEGRATION = "ventilation_mode_integration"

custom_components/rdz_hmi_control/coordinator.py

@@ -34,6 +34,10 @@ from .const import (
     DATA_SYSTEM_ACTIVATION,
     DATA_TEMPERATURES,
     DATA_TIME_SETTINGS,
+    DATA_VENTILATION_MODE_DEHUMIDIFICATION,
+    DATA_VENTILATION_MODE_INTEGRATION,
+    DATA_VENTILATION_MODE_RENEWAL,
+    DATA_VENTILATION_MODE_VENTILATION,
     DATA_VENTILATION_REQUEST,
     DATA_WINTER_SETPOINTS,
     DATA_ZONE_ACTIVITY,
@@ -107,6 +111,9 @@ class RDZDataUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
             integration_request = await self.client.read_integration_request()
             dehumidification_pump = await self.client.read_dehumidification_pump()
 
+            # Read ventilation mode registers
+            ventilation_modes = await self.client.read_ventilation_modes()
+
             if temperatures is None or winter_setpoints is None or summer_setpoints is None:
                 raise UpdateFailed("Failed to read data from Modbus device")
 
@@ -140,6 +147,11 @@ class RDZDataUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
                 DATA_RENEWAL_REQUEST: renewal_request,
                 DATA_INTEGRATION_REQUEST: integration_request,
                 DATA_DEHUMIDIFICATION_PUMP: dehumidification_pump,
+                # Ventilation mode states
+                DATA_VENTILATION_MODE_DEHUMIDIFICATION: ventilation_modes.get("dehumidification") if ventilation_modes else None,
+                DATA_VENTILATION_MODE_VENTILATION: ventilation_modes.get("ventilation") if ventilation_modes else None,
+                DATA_VENTILATION_MODE_RENEWAL: ventilation_modes.get("renewal") if ventilation_modes else None,
+                DATA_VENTILATION_MODE_INTEGRATION: ventilation_modes.get("integration") if ventilation_modes else None,
             }
 
         except Exception as ex:

custom_components/rdz_hmi_control/modbus_client.py

@@ -558,3 +558,19 @@ class RDZModbusClient:
         return await self._read_zone_bitmask(
             REGISTER_DEHUMIDIFICATION_PUMP_START, REGISTER_DEHUMIDIFICATION_PUMP_COUNT
         )
+
+    async def read_ventilation_modes(self) -> dict[str, bool] | None:
+        """Read ventilation mode registers 8201-8204.
+
+        Returns dict with keys: dehumidification, ventilation, renewal, integration.
+        LSB (bit 0) of each register indicates on/off state.
+        """
+        registers = await self.read_registers(8201, 4)
+        if registers is None:
+            return None
+        return {
+            "dehumidification": bool(registers[0] & 1),
+            "ventilation": bool(registers[1] & 1),
+            "renewal": bool(registers[2] & 1),
+            "integration": bool(registers[3] & 1),
+        }