Glue a small magnet to the pot, place one or more reed switches around to be activated by turning the pot, and use that for a wake-up signal.
Alternatively put a metal gear on the pot and a wiper that touches the gear teeth when rotating.
Glue a small magnet to the pot, place one or more reed switches around to be activated by turning the pot, and use that for a wake-up signal.
Alternatively put a metal gear on the pot and a wiper that touches the gear teeth when rotating.