Introduction - If you have any usage issues, please Google them yourself
The use of serial communication between the microcontroller to achieve the function of electronic password lock. The use of single-chip serial port itself can be very convenient to achieve communication between the microcontroller, so that the value of the input password sent to the host, check whether the correct password. The electronic code lock is divided into two parts, one part is outside, the keyboard part and the password display the other part is inside, there is a password setting and display.