@Will-Dickson you seem to be correct, although I can't fathom why you would run a test you can't get data from, that's not a test. It amounts to using the cheapstat as a voltage source.
Posts made by WizWom
RE: Constant voltage/current mode
The Cheapstat firmware http://web.chem.ucsb.edu/~kwp/cheapstat/ most certainly sends data ove the USB; it sends it as an 8-bit binary stream preceeded by the mode.
It will also send the configurations as mode/config stream as a reply to any incoming USB data.