Long time reader - First time Frsky Telemetry user.
Flight Controller
CUAV V5 Nano, planning on using the “UART4” port as follows:
- SERIAL4_PROTOCOL,10
- SERIAL4_OPTIONS,7
I dont get the PullUp/PullDown/NoDMA options listed but I do get the InvertTX/InvertRX/Swap options.
I had to set the options as listed above before telemetry worked, combined with the cable as listed below.
Reboot the FC after changing any of these.
Cable
Minimalist cable, only the Tx wire and ground wire to the S-Port signal and ground of the Frsky X8R.
Connect a pull-down resistor between Tx and Gnd wires, I used 2k, it’s what I had lying around.
Taranis X9D+
OpenTX 2.3.2
There doesn’t appear to be the LUAC option, but I ticked the LUA option and forged ahead regardless…
Loaded the scripts onto the SDcard.
Added the script to a telemetry screen as per the wiki.
Taranis now announces the script is ready, the telemetry screen shows “No Telemetry Data”.
Discovering sensors returned a bunch of new ones.
Telemetry screen now showing everything as hoped for! 
Now we need to disable some of the other special functions and audio we had set up in the Taranis 
EDIT: just to be clear, I didnt download a new version of OpenTX or anything like that, the radio was already all set up and I just ticked the LUA option and added the yaapu scripts to the SDcard, added the script to the telemetry screen in a particular model without affecting any other models.