So i am back again, here is what i get so far.
I thought i bought a HM10 module, but unfortunately i got only one of this fake devices, so i bought a Arduino Nano and followed this instructions : https://www.youtube.com/watch?v=ez3491-v8Og
Now i am able to detect and connect to the onewheel. (The red LED is not flashing anymore, this means i am paired).
Next step will be understanding the code that windaddict posted, but this is java code and by now i don't speak java so this could take a bit g. As far as i understood until now, i have to send some request for a address and the result is what i need eg. 0x0045 should stand for the lighting mode. But what exactly to send, i don't know until now.
i will inform you when i make more progress...