I wanted to make my coffee machine smarter. I started out by plugging it into a smart plug. That was fun, but not perfect.
For starters, I prepared the machine the night before a few times, only to find out the next morning that I forgot to set the power switch on the machine to “on”. Home Assistant did turn on the smart plug, but since the machine was turned off itself, no cuppa for this guy. Big disappointment.
Another bit of irritation with this setup was still having to turn on the power plug after having turned on the machine manually.
The confusion I ran into is of course the result of having two distinct power switches for a single device, where both switches have to be turned on to make the machine work. That is why I came up with the plan to hack the coffee machine by installing a power switch that can be controlled by both Home Assistant and the physicial switch on the machine. That way, there is only one power switch, removing all confusion.
I ended up installing a FIBARO switch and so far I love the results.
Pictures and a description of my hack can be found on my github page
Also thanks to my cat Harry, which was a great help during construction.