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.