def set_dimmer_start_time(self, hour, minute):
        """Set start time for task (hh:mm) in iso8601.

        NB: dimmer starts 30 mins before time in app
        """
        #  This is to calculate the difference between local time
        #  and the time in the gateway
        d1 = self._gateway.get_gateway_info().current_time
        d2 = dt.utcnow()
        diff = d1 - d2
        newtime = dt(100, 1, 1, hour, minute, 00) - diff

        command = {
            ATTR_SMART_TASK_TRIGGER_TIME_INTERVAL:
                [{
                    ATTR_SMART_TASK_TRIGGER_TIME_START_HOUR: newtime.hour,
                    ATTR_SMART_TASK_TRIGGER_TIME_START_MIN: newtime.minute
                }]
            }
        return self._task.set_values(command)
Set start time for task (hh:mm) in iso8601.

        NB: dimmer starts 30 mins before time in app