I know, I know … last time I said I'd post some very basic software soon. And, slackly, I haven't. Here's why…
The short version: after the first home-made prototype of the interface board I made a few changes to the circuit, re-designed the board, sent it out to have a small run professionally made, started work on schematic for the main board, ordered the parts for both, and planned to release a quick demo package after building a new interface board (rather than release my mess of spaghetti code and half-arsed functions as a 'demo' that'd need modification to work with the new design).
Most of that went swimmingly. But…