Worked for a startup circa ~2017 that was working on essentially the same thing for these cards, and a connector/interface that plugged into C and then eventual

Worked for a startup circa ~2017 that was working on essentially the same thing for these cards, and a connector/interface that plugged into C and then eventually Python. Got a pretty good buy offer for a startup of less than 10 people, but the CEO turned it down, and we went under shortly after.