Add is_on property to check the state of device.

- This is related to #496 where if the on/off are string and usef if not both will return true, implement is_on to handle these cases as well

custom_components/localtuya/climate.py

@@ -1,6 +1,4 @@
-"""Platform to locally control Tuya-based climate devices.
-    # PRESETS and HVAC_MODE Needs to be handle in better way.
-"""
+"""Platform to locally control Tuya-based climate devices."""
 
 import asyncio
 import logging
@@ -258,6 +256,11 @@ def __init__(
             set_temp_unit = config_unit(config_temp_unit)
         self._temperature_unit = set_temp_unit
 
+    @property
+    def _is_on(self):
+        """Return if the device is on."""
+        return self._state and self._state != self._state_off
+
     @property
     def supported_features(self):
         """Flag supported features."""
@@ -299,7 +302,7 @@ def max_temp(self):
     @property
     def hvac_mode(self):
         """Return current operation ie. heat, cool, idle."""
-        if not self._state:
+        if not self._is_on:
             return HVACMode.OFF
         if not self._hvac_mode_dp:
             return HVACMode.HEAT
@@ -321,7 +324,7 @@ def hvac_modes(self):
     @property
     def hvac_action(self):
         """Return the current running hvac operation if supported."""
-        if not self._state:
+        if not self._is_on:
             return HVACAction.OFF
 
         if not self._conf_hvac_action_dp:
@@ -419,15 +422,15 @@ async def async_set_temperature(self, **kwargs):
 
     async def async_set_fan_mode(self, fan_mode):
         """Set new target fan mode."""
-        if not self._state:
+        if not self._is_on:
             await self._device.set_dp(self._state_on, self._dp_id)
 
         await self._device.set_dp(fan_mode, self._fan_speed_dp)
 
     async def async_set_hvac_mode(self, hvac_mode: HVACMode):
         """Set new target operation mode."""
         new_states = {}
-        if not self._state:
+        if not self._is_on:
             new_states[self._dp_id] = self._state_on
         elif hvac_mode == HVACMode.OFF and HVACMode.OFF not in self._hvac_mode_set:
             new_states[self._dp_id] = self._state_off
@@ -501,7 +504,7 @@ def status_updated(self):
                     self._preset_mode = PRESET_NONE
 
         # If device is off there is no needs to check the states.
-        if not self._state:
+        if not self._is_on:
             return
 
         # Update the HVAC Mode