I’m not sure my post belongs here but I’ll post it anyway.
I have installed my Arduino Uno with the CNC Shield, loaded the IDE and such. I did the BLINK and it is blinking. I downloaded The Laser GRBL app and I can not activate it. I checked the com ports and Arduino is comm 8
Broadband is comm 7
Intel is comm 4
I have tried all these but it will not open. What is missing.
You can’t connect to the Arduino? Or you can’t run the machine?
Did you reinstall grbl after you installed the blink sketch?