This project implements a scrolling marquee on a 20x4 I2C LCD display using an Arduino. The code displays static and scrolling text on different rows of the LCD, with adjustable scrolling speed.

Screens may come with different I2C addresses, trying these addresses should help : 0x27 or 0x3f If your display still does not work : Use testing mode in order to show "hello world" on the screen at ...