code: def scene_off(self):
          
          user_data = Userdata({'d1': self._group,
                                'd2': 0x00,
                                'd3': 0x00,
                                'd4': 0x13,
                                'd5': 0x00,
                                'd6': 0x00})
          self._set_sent_property(DIMMABLE_KEYPAD_SCENE_ON_LEVEL, 0x00)
          cmd = ExtendedSend(self._address,
                             COMMAND_EXTENDED_TRIGGER_ALL_LINK_0X30_0X00,
                             user_data)
          cmd.set_checksum()
          self._send_method(cmd, self._received_scene_triggered)
docs: Trigger group/scene to OFF level.