I’m not sure when I’d use this, but its a neat concept

Decimen is an open-source web app that moves files between devices through an animated QR stream, requiring no direct network connection, pairing, account, or native app.

  • thehatfox@lemmy.world
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    17 hours ago

    I remember IrDA, I also remember it being frustratingly slow and unreliable.

    Visible light data transfer isn’t new either. The Timex Datalink watches were using flashing coloured patterns on a PC monitor to send data to them in the 90s.