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-According to the preset passwords, using the two keys to achieve the code input function, when enter the correct password, the lock will open, if the input is incorrect password t