Took a closer look at the parameters at the stock fw of my Matek M8Q-CAN. It runs on “f303-MAtekGPS”.
All the “RNGFNDxxx” parameters are available. It should be able to support your rangefinder out of the box.
@tridge I am trying to get f303-PWM to work on a MRO Cannode but cannot get any output from it. Is there a trick to making this work? ive tried changing the functions, but im not getting any pwm through the pads PA2,PA3, PB14 or PB15