Put a new arduino and put a recent grbl inside it. I’ve the same card and it works.
I made that in order to keep the initial benbox (the blue one). But as it works, you can put the grbl inside it without changing Arduino.
Put a new arduino and put a recent grbl inside it. I’ve the same card and it works.
I made that in order to keep the initial benbox (the blue one). But as it works, you can put the grbl inside it without changing Arduino.