I live in a big city in the center. When i activate “Show bluetooth devices without names” in the developer settings of my android 13 phone, there appear loads of this devices. I have no clue what they are. Does anyone know? Are that the bluetooth nanobots of the vaxxinated people? (/s to last question!)

    • YodaDaCoda@sh.itjust.works
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      1 year ago

      It varies. Some of them use Bluetooth Low Energy, some of them use other wireless techniques for lower power and greater range.

    • EddoWagt@feddit.nl
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      1 year ago

      They’re usually e-ink displays that get their power from NFC, so they’re probably not Bluetooth

      • B0rax@feddit.de
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        1 year ago

        That’s not correct. They run on coin cells and use their own RF protocol. Most use something like zigbee. Others even use light to transfer data.