根据设定好的密码，采用二个按键实现密码的输入功能，当密码输入正确之后，锁就打开，如果输入的三次的密码不正确，就锁定按键3秒钟，同时发现报警声，直到没有按键按下3种后，才打开按键锁定功能；否则在3秒钟内仍有按键按下，就重新锁定按键3秒时间并报警。-under preset passwords, use two keys to achieve the importation of password function, when the correct password, it locks open, if the three input the password is not correct, it lock button three seconds, also found sirens and no keys pressed until the three species only after the open button lock function; Otherwise, in three seconds still pressing buttons on the lock button again three seconds and the police.