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  • If you want some kind of wireless sensor then you could do a lot worse than this...

    • Rechargeable, with proper charger
    • Bluetooth Low Energy
    • Vibrate
    • Screen
    • Button
    • Accelerometer
    • 2x pads on the back that are just general purpose IO
    • 2x pads on one side that are general purpose IO too (probably meant for a 32k crystal)

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