Need help to design this serial interface

Thread Starter


Joined Jun 16, 2012
I need a lcd display like these
configuration. The LCD
Module can be set to receive
and display serial data (TTL/
CMOS) at 300, 1200, 2400 and
9600 baud (true or inverted,
switch selectable).
Lcd 4*20 characters. any pic microcontroller
Or give some hints.


Joined Oct 31, 2011
You want a RS232 compatible dumb terminal? I've done that. Once you have the LCD working with the microcontroller, use a MAX232 (or similar) to acquire the input, feed it into the micro's UART, and write a program to display the received character on the LCD.

Making it look nice, wrap around, scroll, etc, is just more coding. I did not require that functionality so I can't comment on what's required.

On the other hand, if you just want to send characters to an LCD serially, you can use a shift register, or you can buy an "LCD serial backpack"