Serial-LCDKeypad Arduino Sketch Code

It works!

Here’s a sample working sketch code for communicating with your Arduino Uno through USB Serial with some major changes and features included.

  • /backlight on and /backlight off   to switch the LCD backlight
  • /1 and /2   to switch lines to print a message on LCD
  • /cls   to clear the screen
  • Keypad buttons sends a serial messages to host computer.

You can download the code at

Serial Communication