@Kusalananda Well, technically with a raspberry pi and a few solid-state relays , bash could brew coffee . . . I actually wanted do that as a project at one point
@derobert Depending on the coffee machine, of course. If you're building one from scratch - you'd need relays, but if the coffee machine is programmable or is IoT type of thing, maybe you can even ssh into it :3
@Serg well, even fairly simple coffee pots seem to have a push-button to start. So probably low-voltage, low-current.
But yeah, if you build your own... Though I'd wonder why not just use a normal relay. Not like a coffee pot needs to be silent, the water is going to make much more noise than the relay