Servers by jDrones

Holybro Pixhawk 4 and Radiomaster R161

Hello,
Does anybody know how to connect both S.BUS and S.PORT ( to have both rc and telemetry down via frsky) when using The Radiomaster R161 and Holybro Pixhawk 4 ?
The pinout of the R161 is as follows:
gnd
5V
S.BUS
S.PORT
RSSI

And the holybro pixhawk 4 has a lot of pins, but the “DSM/SBUS RC” port has the following pinout:
5V
S.BUS
RSSI
VDD_3V3_SPEKTRUM
GND
http://www.holybro.com/manual/Pixhawk4-Pinouts.pdf

Can I use VDD_3V3_SPEKTRUM as S.PORT somehow ?

Or do I need to use -,+,sbus from the “DSM/SBUS RC port” and connect the receiver S.PORT to one of the telem ports of the PX4 ?

Your 2nd suggestion is correct. Typically you would connect S.PORT to a telem port and set up SerialX_Protocol as 10 for frsky passthrough

SerialX_Protocol 10 and SerialX_Options 7, then run 1 wire from the Telem TX port to S-Port.

1 Like
Servers by jDrones