Hi
Finally it works. It’s hard to say where was the problem because i started from scratch I flashed all the firmwares and so on. I see several potential pitfalls.
-
I noticed a small difference between firmware upgrades with MP and QGC. With copter 4.0.5 uploaded to my Pixhawk mini the B/E led was blinking. It is not the case with the lates firmware uploaded with QGC. It is not necessarily an error It could mean “autopilot needs to be configured or calibrated before flying” (Pixhawk UI leds)
-
I think each time i force the bind (once you register your reciever it is automatic) or I change the number of channels the R9SX CH6 configuration is reset. There is a big big chance I forgot to set up the SBUS output that when I tested CH 1-4 to 1-16 configurations in a random order
-
I read this comment Pixhawk 4 mini FrSky Sbus port Problem and I wonder if it is possible to switch between PWM/SBUS modulation or reset the SBUS option by holding the bind button to long (I dont want to jinx so I will not test that). It is not documented in the r9sx manual but this functionnality is implemented on many other frsky recievers (FrSky website)
Thx