Yep, that's a fair point: both the Raspberry Pis and the smart PLCs were indeed absolutely overkill for the project. However, they're what we know best, and min

Yep, that's a fair point: both the Raspberry Pis and the smart PLCs were indeed absolutely overkill for the project. However, they're what we know best, and minimising development time for a small prototype multi-site deployment was more of a concern than using expensive-ish hardware. For production, obviously we'd move to something less ridiculous.