
I’ll give Greg the prize, since he was the first to basically guess the ware. However, I never considered the possibility that the snap-action switch could be an anti-tamper mechanism. Maybe that’s what it is for? My assumption was that the switch is what’s used to turn on the RFID circuit to check for the presence of an RFID antenna. Given the simplicity of the components and the lack of an obvious way to synchronize the card’s code to a central server, I actually suspect the device can’t even read the card: it just checks for the presence of a tuned RFID load, so that you can’t keep power on in the room by jamming a random business card into the slot.
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