Thinking more about the Bxx commands, we could use a second parameter to indicate which AUX to switch:
‘B21 P n’ turns off AUXn (AUX1-3)
‘B31 P n’ turns off AUXn (AUX1-3)
I’d limit the command to AUX1-3 as AUX4 is currently used for zeroing zAxis with the G38.2 gcode, and AUX5&6 pin definitions differ between the beta and v1 boards.
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