It's at the moment just an RGB controller(?), but in the future I would like to know what is the headset battery percentage. Logitech hub is not available on linux so I created my own.
$ sudo apt install libhidapi-dev libhidapi-libusb0
$ gcc main.c -o main -I/usr/include/hidapi -lhidapi-libusb
$ ./main -t [top|bottom] -r <rgb hex value> -m [fixed|breathing]
Example:
sudo ./main -t top -r fc200c -m fixed
To work without sudo you need to add an udev rule as documented in https://github.com/libusb/hidapi#hidapi-has-four-back-ends