The new espresso machine isn't here yet and my sister is talking about moving up the schedule and getting the other espresso machine replaced as well.
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I should probably pull the PID controllers and USB adapters out before the old machines are hauled away. Neither was original to the machine and I can always use more test hardware.
Fun fact: if you have an espresso machine with a PID controller that does RS-485 and connect that to a USB serial adapter, you can hook your espresso machine up to Typica. That's a lousy idea as a full time thing but it's nice to have as an option during the initial controller tuning since factory recommended settings tend to be garbage and if you know what you're doing you can get better results than your controller's auto-tune features.