No change in RPM signal. Always showing -1

Hi,

Im trying to add pixhawk 2.4.8 on my ground robot. Im trying to test the rpm results but no avail as yet.

I have mission planner 1.3.80 with ArduRover V4.2.3

The following are my parameters:

RPM1_ESC_MASK 0
RPM1_MAX 100000
RPM1_MIN 10
RPM1_MIN_QUAL 0.5
RPM1_PIN 55
RPM1_SCALING 1
RPM1_TYPE 2
RPM2_ESC_MASK 0
RPM2_MAX 100000
RPM2_MIN 10
RPM2_MIN_QUAL 0.5
RPM2_PIN 53
RPM2_SCALING 1
RPM2_TYPE 2

all of my relay pins are disabled (-1). I have tested my hall sensor output which gives pulses when i rotate my wheels, but no change in rpm results. I have also tested it my jumping my wires fro my pwm output (left throttle) directly into hall sensor (AUX6/AUX4) but still no change. It is constantly giving -1.

Any tips, guidance, or suggestion that you may have?

Thank you for you time!

Best,
Alam

Have you changed SERVO12_FUNCTION and SERVO14_FUNCTION to -1 (GPIO)?