CRSF and Taranis x9d

tokyov1 · December 23, 2024, 2:02am

HI All,

I am having a heck of a time getting the CRSF setup on Arduplane and getting any telemetry to my osd (particularly the LQ/RSI).

Below is my output. Control only works if I set SBUS to output 8. If I change it to CRSF rx on channel 7 and CRSF TX on channel 8, the link dies and I Cannot control anthing with my radio. When I put it back to channel 8 on SBUS, the radio controls the plane.

How can I get LQ/RSSI working? I am using a 743 wing Matek board. I ahve spent 2 hours on this and cant figure it out. My previous dragonlink was sending RSSI, but CRSF is not.

I have everything hooked up to RX6/TX6 on the board which corresponds to Serial7 in arduplane. I am not sure why changing out 7 and output 8 to CRSF RX and CRSF TX is causing me to lose my radio link to the plane.

Output 8 on the receiver goes to the RX6 pin on the matek board. But as I said above, I only can control the plane when output 8 is set to SBUS and not CRSF.

Allister · December 23, 2024, 6:29am

If you want telemetry you’ll need to set the RX to CRSF RX and CRSF TX.

On the flight controller set:

BRD_ALT_CONFIG,1  # This turns RX6/TX6 into a true UART, needed for CRSF.
SERIAL7_PROTOCOL,23
SERIAL7_OPTIONS,0
RSSI_TYPE,3

For more details look here: Flight Controller H743-WING V2/V3 – Matek Systems

tokyov1 · December 23, 2024, 1:32pm

I still dont get any telemetry OR rc control when I set Ch 7 to CRFS RX and channel 8 CRFS TX. I only get rc control when I set channel 8 to SBUS.

My crossfire receiver is hooked up to TX 6/RX6 via 2 servo cables:

Servo cable plugged into output 7 on the CRFS RX (which per the outputs is the RX pin on the matek board) going to RX6 on the matek board (plus power and ground)
single Servo cable plugged into output 8 on the CRFS RX (which per the outputs is the TXpin on the matek board) going to TX6 on the matek board.

I have no RC control or telemetry if I put it in this config (CSFR TX/RX on the receiver).

I only get RC control when I change channel 8 on the CRSF receiver to “SBUS.” Why don’t I have rc control when I put the channel outputs on the receiver to crsf rx and tx and not have rc control when channel 8 is set to sbus?

My radio (x9d plus) is correctly set to external RF CRSF.

I confirmed i changed the setting to this:
BRD_ALT_CONFIG,1
SERIAL7_PROTOCOL,23
SERIAL7_OPTIONS,0
RSSI_TYPE,3