How To (Un)Lock Your PC By Being Nearby (With a Bluetooth Phone)

Imagine: you walk into your room, sit in front of your computer, and it unlocks itself. You finish what you’re doing, walk away, and it locks itself. No, it’s not magic – it’s Bluetooth and it’s easy to set up!
What You’ll Need

    A computer with a Bluetooth connection
    A phone or other device that can connect via Bluetooth
    Either the Microsoft or WIDCOMM Bluetooth stack (for Windows)
    Appropriate software
        BTProximity for Windows (free)
        Proximity and an AppleScript for OS X (free)
        BlueProximity for Linux, packaged for Ubuntu (free)

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