OP4 Rpi5 GPIO Pulses - no signalK key assigned

[xiano]

hi,
I'm trying to read my engine RPM using the GPIO app. I selected the signalK key "propulsion.main.revolutions" in the pulses section of the app, but it dose not show up in signalK. My 1W senors all show, but non of the Pulses keys do. I tried (Hz), counter, distance and speed with several keys, but non show in signalk.


setup info:

openplotter 4
last update: today
raspberry pi 5
mcarthur hat


any help would be appreciated