FSR requires pullup resistor? "^zprobe.in" or just "zprobe.in"?

[czyzczyz]

Hi, I've got a Rostock Max v3 with the Ultibots FSR Kit installed, which means the FSR sensors are connected to a "JohnSL FSR Endstop Controller" and then that to the probe pin of a Duet 2 Wifi.

It's been a day of work figuring out all of the things needed to change in my config.g to get the delta up and running with the latest RRF3 firmware. I think the last step may be figuring out how to properly set up for my FSR sensors.

The question is, should my M558 line be:

M558 P5 C"zprobe.in" H5 F600 T2400

or

M558 P5 C"^zprobe.in" H5 F600 T2400

Thanks for any help or information.

[A Former User]

It's a two terminal sensor? If so you'd most likely need the pull up

[czyzczyz]

Might have been inadvisable, but I decided the likely worst thing that would happen if I got it wrong was that it wouldn't detect the plate and would crash through it, and I was ready to cut the power in that case, so I went with C"^zprobe.in". It's been fine.