So i started from scratch, made my modifications using your fork instead of in the .pio file. That didn’t work, so i made the library.json file (Adding just the names, versions and authors) for the BingMachine file. But i was getting an “undefined reference to loop and main” in this an another module. The solution was here
So i’m not so sure why defining library.json was the solution because i did not do it in another module, and i understand is optional. Does platformio need this library.json file then?
In any case, thank you for aall your help!