Hello folks, I'm tearing my hair out trying to get my project to work. I have an Arduino Uno R3 clone (Freetronics 100% compatible) with a 20x4 I2C LCD from DX (part number GY-LCD-V1). I also have four pushbuttons connected via the analog pins (in digital mode.) Other than that I have nothing conne…

Uno R3 + 20x4 I2C LCD - screen freezes / garbage

floresta December 1, 2012, 3:27pm 11

Try it without the serial monitor and see what happens.

Don