I wanted to install GRBL into the Arduino Mega 2560. She wrote that the program had not been booted up. Why?
Post the actual messages, not what you think they say.
What are you using to communicats with grbl? Are you using a version of grbl that is especially for Mega 2560?
Yes. I downloaded github. Does not work. I use schield l293d .. Then I have a program. It works.