Last modified: 2024-01-23 10:44:00
< 2024-01-21 2024-01-23 >I was wrong about the Pn: state being indeterminate when it isn't present. Apparently Pn: appears
in every Grbl status report if any pin is activated. I misunderstood the documentation and took it
to be sent only periodically or on state changes (like with Ov: etc.).
I should hook up a jumper wire to the Arduino I'm testing with and just verify that, but that's good news.
Apparently the probe pin is A5. Let's give it a go. Should be normally-open and connected to ground on contact.
Yep, golden. We get Pn:P on every status report as long as the probe pin is connected to ground.