Simple Arduino sketch to check Grbl external connections to assist troubleshooting
- Limit switches(todo)
- Probe(todo)
- Reset/Abort(todo)
- Feed hold(todo)
- Cycle Start/Resume(todo)
- Coolant Enable(todo)
- Stepper Direction(todo)
- Step pulse(todo)
- Spindle Enable/PWM(todo)
- Spindle Direction(todo)
Refer to Connecting-Grbl for connection details