'Set HVAC mode (auto, cool, heat, off).'

def set_operation_mode(self, operation_mode):

    if (operation_mode == OPERATION_LIST[3]):
        self.vera_device.turn_off()
    elif (operation_mode == OPERATION_LIST[2]):
        self.vera_device.turn_auto_on()
    elif (operation_mode == OPERATION_LIST[1]):
        self.vera_device.turn_cool_on()
    elif (operation_mode == OPERATION_LIST[0]):
        self.vera_device.turn_heat_on()
