Now, it run with an ESP32 over UDP and works great.
Here the files for the ESP32 --> https://github.com/SciLor/Hyperion_LED-Controller
It works with internal grabber and external grabber.
External Grabber -->
The only thing is, that Kodi has to be started first.
(Kodi is started --> power on ESP32)
I will do more tests next week.
Rock64 GPIO, Arduino, and so on.