Teensy 4.1 | ELRS module - how to read/write data?

[ricardo-reis]

Hello!
Not finding much about the exact thing I'd like to do, so, opening a new thread to see if there's anyone around here who has done something on this..

Basically, I'd like to use a Radiomaster Ranger Micro (TX) to send data to a receiver and get telemetry back. The data flow doesn't need any work, but the part of reading/writing on to the TX data pin does.. I was able to find implementation(s) in Arduino for the data conversion and writing to the TX, which could help me starting with this, but can't find anything on the reading telemetry out of the TX data pin..

If anyone reading this has done it and/or has some ideas where to start, I'd appreciate..
Thanks a lot!

 

[MarkT]

Link to datasheet?

 

[ricardo-reis]

Link to datasheet?

The closest I have to that is this link, but it's not a datasheet..

Radio Preparation - ExpressLRS

Get your Radio Handset prepared for ExpressLRS with this setup guide.

www.expresslrs.org

helps understanding pinout, bauds and a few other configs that should be set up on the radio controller.

I have a few links that may be useful too:

Home

Contribute to crsf-wg/crsf development by creating an account on GitHub.

github.com

Arduino-Transmitter-for-ELRS/PPMtoCRSF at main · kkbin505/Arduino-Transmitter-for-ELRS

Arduino based RC transmitter for ELRS external TX Module - kkbin505/Arduino-Transmitter-for-ELRS

github.com

GitHub - lexfp/le3dpToPPM: Logitech Extreme 3d pro joystick to PPM for Radio control

Logitech Extreme 3d pro joystick to PPM for Radio control - lexfp/le3dpToPPM

github.com

 

[MarkT]

So what I gleaned from that is that it used CRSF protocol - then I found a possible helpful site: https://medium.com/@mike_polo/parsi...-raspberry-pi-for-telemetry-data-79e9426ff943
and:
https://docs.px4.io/main/en/telemetry/crsf_telemetry.html

 

[ricardo-reis]

So what I gleaned from that is that it used CRSF protocol - then I found a possible helpful site: https://medium.com/@mike_polo/parsi...-raspberry-pi-for-telemetry-data-79e9426ff943
and:
https://docs.px4.io/main/en/telemetry/crsf_telemetry.html

These links seem to provide some info, but they implement something different. They're both on the RX side, which I'm leaving untouched.
Might be the same addresses for the data, though.. I'll have to test that.
Thanks