Output/aux pixhawk problem

hello, I’d like to take pictures with my drone camera. I connected the camera switch to the ground and to the AUX 2 - CH10 signal (I have a frsky x8r receiver in SBUS - 16ch) of the pixhawk 2.4.8.
I did tests by setting SERVO10_FUNCTION on values 10 (trigger camera), 1 (rc passthrough) and SERVO10_OPT on “camera trigger”. The result is that with the radio switch at rest, between signal and ground I have 0.15v while with the radio switch pressed I have 0.32v. This way I can’t trigger the camera. Theoretically I should have a voltage of 0 - 5v (0-3.3v) between the minimum and maximum value of the pwm, right? could anyone help me? thank you

Looks like we both are facing same problem… and no solution in sight till now!

Hope someone from the forum does help!