Can I ping or “hello world” an Arduino.
Background: My son and I bought a 3-D printer kit. (EZ-3D)
We are having some issues talking with it. (Well we can't talk at all.) So we thought to upload the firmware,
It’s an Arduino Mega 2560, and when we upload the Arduino times out… but it takes a minute or two. Can I try some simpler program just to try and talk to the Arduino?
I’m almost a “virgin” Arduino user so be gentle.