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I've seen a prototype IoT thing (let's say a lightbulb) that paired with its peers by transmitting a public key through a flashing LED. Never became a product,
by zwkrt 8y ago
I've seen a prototype IoT thing (let's say a lightbulb) that paired with its peers by transmitting a public key through a flashing LED. Never became a product, but made me realize how easy such a thing is.
- gh02t 8y agoI've heard of this being used in a few products, especially more advanced "LiFi" systems. I think one company was advertising an in store network for things like setting price signs and such based on optical data transmission using special bulbs.
- Jach 8y agoA friend owns a few "smart power strips", you connect them to a wifi network by installing a phone app, then when you're ready holding the phone screen up against a light sensor on the strip. The phone screen flashes a bunch to send the network info and whatever else over. It seemed like a non-techie friendly way of doing it while also being cheaper than either adding a bluetooth module and having the phone connect over that first, a central hub, or a little screen + keypad like printers.