Thanks for the feedback 
This is my first project working with Arduino, so I don't know a lot of the tricks that may seem obvious to others.
Regarding the strings, I was originally going to use an external utility to display the connections, but decided to pull it into the project. Probably it would be better to conditionally compile that in only if it's in develop mode…
memcpy: thanks for the pointer, didn't think of that.
documentation: since it was simple, I was just letting the examples do the documenting But that's pretty lazy, so I'll get something proper in there.
Again, thanks for the feedback!