The led_sysdefs.h indeed does not appear to specify the Silicon Labs MGM240s chip that's used for the Arduino nano matter (preview) board. And so here's the request to, if at all possible, get support ...
I'm trying to use this library on Arduino Nano Every, because the newer DMXSerial doesn't seem to work with ethernet shield using the EthernetENC library. When compiling I get the following error: _c: ...