I could use some help with a code for my Arduino Uno that will read a high signal from the GPIO output on my Raspberry Pi and then the Arduino will turn an LED on or flip a relay. I have tried for a few hours now to get this code working but I seem to be doing some thing incorrect. Has anyone tried doing this already where I could just see a sample of the code so that I know where to start? It would help me out a ton!
Thanks in Advance Max Kulik