Periodic unavailable device

[emildeev]

good afternoon, I have 4 air conditioners connected and I encountered a problem, they are intermittently unavailable, they become unavailable at different times, but it feels like they are at equal intervals, there is no useful information in the logs.

[emildeev]

upd: the reason of this behavior it is response with device offline status from self.coordinator.get_device(self._device_id) method.

For me problem resolved by adding cache for device data and attempts for get device data

    @property
    def _device(self):
        if time.time() - self._last_device_update_time < self.wait_time and self._cached_device:
            return self._cached_device
        """Get current device data from coordinator."""
        device = self.coordinator.get_device(self._device_id)
       
        for i in range(10):
            if device and device.is_online == True:
                _LOGGER.debug("Retrieved device %s with status: %s", self._device_id, device.status)
                self._cached_device = device
                self._last_device_update_time = time.time()
                return device
            device = self.coordinator.get_device(self._device_id)

        return self._cached_device

in hisense_ac_plugin/climate.py