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tap with no signal


I have a tap installed,
I have two light up/down
I have no signal on my octopus print.
Signal wire is going to PB7, have also tried PG15 without a result.

It is a signal wire from the toolhead PCB, any suggestions ?
Are the signal and ground reversed?

On Octopus, leave your signal on PG15; PB7 won't work. Ask me how I know...