@Nathan said in Magnetic Rotating Filament Sensor not working:
Error: M591: Remote ports not yet supported by this command
Found the problem:
https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations
Filament monitors for extruders driven by expansion boards and tool boards are not yet supported. Support is planned in release 3.3.0. The filament monitor will need to be connected to the board driving the corresponding extruder.