How can I add support for DJI Remote Controller?

Hello everyone, im working on a drone project and im having trouble adding support for FPV RCs, in my case the DJI FPV Remote Controller 2. I’ve already tried the way over the RawInput Plugin and I was able to get some useable data. However, the range is weirdly mapped. For example the left analogue stick always returns values between -0,322 and 31,678. I utilized the offset to push it in the center and with the scale set to something like 0,016 I get roughly -1 to 1 but now the values are jumping from minus to plus. So not there are not useable.

Other games and websites are having no issues of just picking the controller up. Is there something I missed? Or should I add a mapper to my drone itself.

Its a very niche question, so Im open for every new approach.
Cheers!