All, I am attempting to set up 3DR IRIS+ Tarot gimbal for a friend, using my IRIS+. I have set RC6 to RC PASSTHRU and parameter SERVO9 (AUX 1) to passthru. I monitor AUX 1 with an oscilloscope (no gimbal on my IRIS), and there is no activity whatsoever.
When monitoring RC6 in MP, the PWM varies as I rotate the tilt knob on the IRIS+
controller, so that works. I also tested with SERVO9 set for TILT, no action…
MP 1.3.77 Build 1.3.8110.38294
3DR PX4 FC IRIS+ (fmuv2)