Been a while! Coffee boss has a great upgrade recently, that’s the current sensor. This, combined with a new firmware that counts the time since the last time the current went low (so signifying that a boil cycle has completed therefore a new pot is ready) means that this is suddenly actually useful.
Pictured here is the various circuits combined on one piece of board. The back is a bit of a rats-nest but this should all fit in a project box reasonably neatly. I’ve made up a power cable with twisted mains cable where the individual conductors can be separated out without having to cut any insulation but I need to get that cleared off with the estates people – I would still prefer a sealed moulded plug on the part that plugs into the coffee machine itself.
The reason why I put the current sensor on this part (near the machine, where there water is) is because the other option is down on the floor, and the wire going to the sensor isn’t very long. That’s still a decent option for a more permanent installation.