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 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 | Holybro Docs

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

Pix32 v5 Wiring Quick Start | PX4 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?