Processing + Arduino

[Chrisir]

check this out

Issue with reading Arduino Port

and when you test your second processing code ( what also is a firmata code ) you changed arduino also from your sketch to firmata? when your processing gives you a 0.0, did you measure voltage at that arduino pin? //____________ anyhow i try to play with your "second code " and yes, i got 0 too!! now that was bad, as i just loaded firmata test my sketch and connect A0 to 5V and all ok test your sketch and it did not work… so i play until i see something, it was the baud rate !…