![]() ![]() Because they know these things as hobbyists, but they and anyone around were never exposed to PLCs. You see this a ton now, with people reinventing the wheel using arduino, raspberry pi and spark fun parts to automate something in the small business they are employed at. But my gut feeling is it’s actually doing at least some of the control to be worth emulating and keeping the original software. For all I know, it’s not much more than a screen connected to a PLC. Mind you, it’s not clear how much of the control is done by the palm pilot. Either way, someone probably made a good decision to keep the old system maintainable by emulating the palm pilot instead of replacing it. Or it seemed like an obvious choice to someone that didn’t know better. It was either an interesting choice that was small and didn’t need a lot of components, compared to the obvious PLC. I was thinking it’s not actually an obvious choice for controlling hardware.
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