Hello I'm trying to upload GRBL 1.1 and this displaying a strange error, I've already checked the cable, port COM and the selection of the Arduíno Uno board on the Arduíno IDE, trying to solve the ...

Grbl is a no-compromise, high performance, low cost alternative to parallel-port-based motion control for CNC milling. This version of Grbl runs on an Arduino with a 328p processor (Uno, Duemilanove, ...