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Looked at fitting a sonoff basic (we have loads in the drawers under the microscope), but it would have needed an extension cable, since the whole thing is running off a 12V wall wart, so you can't stick the sonoff on its cable.
Also, the device has some control buttons on it, and doesn't switch on when it gets power -- you need to tap the on-button (and you can also set the number of days).
Since it got switched off last time by @jackie1050 when it was being too annoying in the laser cutter room, the silty mud settled and the rocks got clayed in and embedded into them. I thought we had nicer ceramic abrading materials than plain river mud.
I've moved it into the metal working room where the soundproofing is better during the day.
The solution would be to open it up and solder across the connection so that it is always on when the power is on. Then we can control it from a sonoff on its power line. We would then build up a schedule of being on during the night (or when the hackspace closed switch issue #825 gets set). When it's active, the sonoff should switch it on for a few minutes every three hours to stop the mud from completely settling.