Add fan platform to ozw component (#35249)

* Add fan platform

* Add fan discovery schema

* Use constants for dispatcher signal

* Move fan platform to ozw

* Fix fan discovery schema

* Add previous speed to handle value 255

* Make fixture reading more robust

* Add fan tests

* Remove not needed fixture info

* Validate speed

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/ozw/fan.py

@@ -0,0 +1,95 @@
+"""Support for Z-Wave fans."""
+import logging
+import math
+
+from homeassistant.components.fan import (
+    DOMAIN as FAN_DOMAIN,
+    SPEED_HIGH,
+    SPEED_LOW,
+    SPEED_MEDIUM,
+    SPEED_OFF,
+    SUPPORT_SET_SPEED,
+    FanEntity,
+)
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+
+from .const import DATA_UNSUBSCRIBE, DOMAIN
+from .entity import ZWaveDeviceEntity
+
+_LOGGER = logging.getLogger(__name__)
+
+SUPPORTED_FEATURES = SUPPORT_SET_SPEED
+
+# Value will first be divided to an integer
+VALUE_TO_SPEED = {0: SPEED_OFF, 1: SPEED_LOW, 2: SPEED_MEDIUM, 3: SPEED_HIGH}
+SPEED_TO_VALUE = {SPEED_OFF: 0, SPEED_LOW: 1, SPEED_MEDIUM: 50, SPEED_HIGH: 99}
+SPEED_LIST = [*SPEED_TO_VALUE]
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up Z-Wave Fan from Config Entry."""
+
+    @callback
+    def async_add_fan(values):
+        """Add Z-Wave Fan."""
+        fan = ZwaveFan(values)
+        async_add_entities([fan])
+
+    hass.data[DOMAIN][config_entry.entry_id][DATA_UNSUBSCRIBE].append(
+        async_dispatcher_connect(hass, f"{DOMAIN}_new_{FAN_DOMAIN}", async_add_fan)
+    )
+
+
+class ZwaveFan(ZWaveDeviceEntity, FanEntity):
+    """Representation of a Z-Wave fan."""
+
+    def __init__(self, values):
+        """Initialize the fan."""
+        super().__init__(values)
+        self._previous_speed = None
+
+    async def async_set_speed(self, speed):
+        """Set the speed of the fan."""
+        if speed not in SPEED_TO_VALUE:
+            _LOGGER.warning("Invalid speed received: %s", speed)
+            return
+        self._previous_speed = speed
+        self.values.primary.send_value(SPEED_TO_VALUE[speed])
+
+    async def async_turn_on(self, speed=None, **kwargs):
+        """Turn the device on."""
+        if speed is None:
+            # Value 255 tells device to return to previous value
+            self.values.primary.send_value(255)
+        else:
+            await self.async_set_speed(speed)
+
+    async def async_turn_off(self, **kwargs):
+        """Turn the device off."""
+        self.values.primary.send_value(0)
+
+    @property
+    def is_on(self):
+        """Return true if device is on (speed above 0)."""
+        return self.values.primary.value > 0
+
+    @property
+    def speed(self):
+        """Return the current speed.
+
+        The Z-Wave speed value is a byte 0-255. 255 means previous value.
+        The normal range of the speed is 0-99. 0 means off.
+        """
+        value = math.ceil(self.values.primary.value * 3 / 100)
+        return VALUE_TO_SPEED.get(value, self._previous_speed)
+
+    @property
+    def speed_list(self):
+        """Get the list of available speeds."""
+        return SPEED_LIST
+
+    @property
+    def supported_features(self):
+        """Flag supported features."""
+        return SUPPORTED_FEATURES