... knocks,now we are permitted to start to setup password:example"123456".knock 1 time to setup first digit"1",LED response ... lighting 1.5 seconds,then go to next step.knock 2 time to setup second digit"2",LED response 2 ... lighting 1.5 seconds,then go to next step.knock 4 time to setup fourth digit"4",LED response ... lighting 1.5 seconds,then go to next step.knock 6 times to setup sixth digit"6",LED response ...