LCD1602-lock

代码说明：

  LCD1602显示的液晶密码锁，第一行显示显示固定密码，第二行显示输入密码，密码输入完毕后会有正确或者错误提示,为了演示方便，提示密码，输入密码部分也没有用星号代替。可以自行更换成星号。(The LCD1602 display LCD password lock, the first line shows the the display fixed password, and the second line enter the password after password input will be correct or error, and to demonstrate the convenience, prompting the password, enter the password part is not replaced with asterisks. Replaceable asterisk.)