I found some libraries online to interface controllers with an arduino. I was trying to make a converter that would allow someone to plug a wii classic controller into a gamecube. I have the arduino powered off the 5v line of the gamecube, and the arduino successfully reads inputs from the classic controller, however, I am having trouble getting the data to be written to the gamecube. I'm using this library https://github.com/NicoHood/Nintendo for the gamecube portion, and it does have an example to read grom a GC controller, and mirror it to the console (which I basically tried doing this, and injecting the classic controllers buttons). Does anyone have any insight on this?