Regarding USB on Arduino

[TylerReedMC]

I'd like to point out that connecting to an Arduino board via USB, resets the board. This was my primary reason for dropping USB support. I'm certainly not opposed to re-introducing it, but just wanted to make the issue clear. There are hardware modifications that can be done on the Mega (and assuming other Ardi boards) to side-step the problem but they can cause unpredictable results when re-programming the ardi over USB. I had to repeatedly perform hard resets while uploading sketches in order to eventually get the board re-programmed. Also, without resolving the reset issue, any strategies put in place to keep for timekeeping could need to be revisited.

Note that while USB support could be nice for testing, such a configuration in a production environment would be rare.