Hi all,

I'm new to the forum so apologies if I don't know how it all goes on here just yet. I am a beginner FPV pilot and have just build my second quad after my first one ended up in a crater lake (boy, was I sad).

I finished the build and everything looked great. It worked, the motors spin when tested in Betaflight and my Taranis X7 bound with the new Crossfire Nano RX on my drone. However, for some reason my receiver does not register any inputs on Betaflight. I scoured the internet (and this forum) for days trying to look for a solution. Double-checked the UART, went into Agent-X to check the output map, checked the soldering, etc. etc. I still consider myself very much a beginner even though this is my second quad. I am at a loss here, I have no idea what's wrong and I was hoping this forum could help me figure it out.

Below you can see the soldering joints from the Crossfire Nano RX to my SpeedyBee F405 V3. Sorry if the RX joints are a little unclear. I made the stupid mistake of ziptying and taping things in before checking whether the receiver worked in Betaflight.



This is my Agent-X output map:


And I have attached my CLI dump. I haven't set anything up for the drone as I first wanted to make sure the receiver was working.

I really want this to work and this forum is my last hope.
Thanks a lot in any case!

Cheers,
Sunny

Edit: I fixed it! It was probably a faulty UART (strange considering it was a completely new board). I switched it to another UART and now everything is working.

First question, do you have the Crossfire module on the radio? If you don't, you need that! If you do have it, what color is the LED? You may have to update the RX with the LUA script

(15-Jan-2023, 10:29 PM)relentlesstech Wrote: First question, do you have the Crossfire module on the radio? If you don't, you need that! If you do have it, what color is the LED? You may have to update the RX with the LUA script

I have a Crossfire module on the radio yes. I already bound my Taranis with the RX and both LEDs are green (not blinking). I have updated OpenTX and believe I have the latest Crossfire LUA script on my controller. The RX claims it does not need an update, or at least it doesn't in Agent X.

Any other ideas because I really want this to work and I keep trying other things but nothing works...

Was your old quad running Crossfire? If not, it's possible that your model setting in OpenTX isn't set on external and CRSF.
Everything else looks perfect to me.

(17-Jan-2023, 10:28 AM)Suros Wrote: Was your old quad running Crossfire? If not, it's possible that your model setting in OpenTX isn't set on external and CRSF.
Everything else looks perfect to me.

Yeah my old quad was running Crossfire as well and it worked just fine then. The only difference now is that my old quad had an older crossfire module and OpenTX version was also older. I flashed everything to the latest update (both OpenTX on the controller, my SD card content and lua script and the nano). The controller is bound and I think I set it to external and CRSF correctly. Though can you specify what you mean by the model's setting in OpenTX? Do you mean on the controller?

Shows you got a solution. What was the issue if you don't mind me asking?