Here is the protocol definition for ROCKETuC.
And yes, the Simpsons already did it, ah no I mean Firmata does something similar, but we use a different protocol ... A standard in general would be a good thing but is hard to achieve. But the protocol (as well as the transport layer) of ROCKETuC are only one aspect of ROCKETuC, and they are exchangeable in fact.
Regards,
Stefan
ROCKETuC_Protocol.pdf