I’m trying to use ardupilot on my fpv drone. I have inside a mamba F405 MK4 with a FrSky R-XSR as a receiver for my radio.
I soldered the SBUS out of the receiver on the RX1 of the FC. No S.Port.
On the Radio calibration page I don’t see any input.
I’ve tried SERIAL1_PROTOCOL = 23 and 3. SERIAL1_OPTION = 0, 1, 2, 3, 132.
SBUS requires hardware inversion which will only work on SERIAL1. So you must use SERIAL1, but it seems its not working - my guess is that the hardware inversion is the issue.
@Stefano_Giulianelli did you resolve this? If so can you please inform me how you resolved it? I recently tried the same i am facing a similar issue but with a different Sbus receiver. I connected the Sbus port of receiver to RX1 pin of FC.