Greetings people! I am stuck with GRBL to the point where I am unable to communicate with Arduino. The connection is fine when I initiate a serial connection with Arduino without the CNC shield and I can communicate. However, when I mount the CNC shield, GRBL goes crazy and starts spitting out error codes 1 and 2 (please see screenshots attached). Could anyone help me out? Thanks in advance!!
How did you generate your grbl gcode? What software? Here is the error code list. Grbl v1.1 Interface · gnea/grbl Wiki
I didn't get to the stage where I could input the gcode. I just uploaded grbl to Arduino Uno and tried to connect it to OpenBuilds Control and the interface just hangs up and I see the error (check 2nd image of the first post). It's driving me nuts:/
Are you using a Genuine CNC shield ordered from Protoneer, and a Genuine Arduino? If not - its likely just bad knockoffs causing you headaches. Buy Genuine.
I found the problem. The buffoons who soldered the knockoff CNC shield had done such a poor job that they soldered TX and RX pins together. Therefore, Arduino went crazy every time I mounted the shield. I resoldered and separated the two pins, and now everything works like a charm. Thanks for your suggestion; otherwise, I wouldn't have inspected the shield!
