Configuring ExpressLRS RC receiver on Pix32

[not7cd]

We are trying to connect RC receiver to a Pix32 v6. This receiver outputs UART. Only obvious connections on are DSM and RC-IN, which are

I belive that you can connect it in Ardupilot to one of the TELEM ports on a base board.

To allow CRSF and embedded telemetry available in Fport, CRSF, and SRXL2 receivers, a full UART, such as SERIAL6 (UART3) would need to be used for receiver connections. Below are setups using Serial6.
Pix32v6 Flight Controller — Plane documentation

I was unable to find anything in the documentation on the PX4 side. Though there is mention of crossfire devices as tested.

Long range ~900MHz, low latency: “Team Black Sheep Crossfire” or “Crossfire Micro” set with a compatible remote (e.g. Taranis)
Radio Control Systems | PX4 User Guide (main)

It seems that another user was able to enable CRFS support by compiling it.

Connecting ELRS Receiver to Pixhawk 2.4.8 under PX4 Pro - Possible or Not? Need Guidance

Short answer, yes it’s possible. How to do it? You need to set RC_CRSF_PRT_CFG parameter to the serial that you’re using. BUT You can’t use prebuilt PX4 release (or main) firmware for this, as it depends on PX4 modules crsf_rc. To add RC_CRSF_PRT_CFG to parameter list you need to create your own PX4 build Get PX4 repo and needed items for build (Follow this guide - Building PX4 Software | PX4 User Guide), i recommend using ubuntu or WSL ubuntu Build firmware for pixhawk 2.4.8, to do it run …

This is my receiver pinout

And this is connections on the Pix32 side.

Pix32 v6 Baseboard Ports

Only guide for wiring Pix32 v5, using older board. Only points out to PPM, DSM and SBUS receiver.

Pix32 v5 Wiring Quick Start | PX4 User Guide (main)

References to similar topics

Crossfire/ExpressLRS on Holybro PX4

HI! Is there any actual support for CrossFire/ExpressLRS on FMUv5x? For reference, I am planning to use a Holybro Pixhawk 5X and BetaFPV Nano receiver. I do not really need telemetry pass-through to a ground station, but basic telemetry to the radio would be nice.

Connecting a Crossfire Nano Receiver to PX4

Do I wire the Crossfire Nano Receiver to TELEM1? Will I be able to upload new missions via mission/direct it to a new position via QGround Control at the same time, have a means of manual control via a handheld RC if I were to use this method?