• SaveTheTuaHawk@lemmy.ca
    link
    fedilink
    English
    arrow-up
    2
    arrow-down
    1
    ·
    5 hours ago

    This seems like a real stretch.

    TPMS signals are too weak to read even 6 ft from the wheels.

    • ironhydroxide@sh.itjust.works
      link
      fedilink
      English
      arrow-up
      4
      ·
      4 hours ago

      No they aren’t. Out of curiosity I setup an rtlsdr and connected it via RTL-HAOS to my home assistant server.

      The antenna is in the middle of my house and over the last month I have logged over 200 different tire pressure sensor id’s

      • toast@retrolemmy.com
        link
        fedilink
        English
        arrow-up
        3
        ·
        3 hours ago

        Yeah, I don’t know what the range is for picking these signals up, but I know that the detections just scroll on and on on my laptop’s screen when there is any traffic near my house.

        I never realized how chatty the world is on the radio spectrum until playing with one of these. From my house, I can see reports from half a dozen water meters (several reporting leaks), readings from wireless weather stations, signals from certain types of remotes, location data from aircraft, and of course bluetooth and wifi signals from phones and homes. The real trick in using this for tracking would be in filtering out all of the information you aren’t interested in.

        • ironhydroxide@sh.itjust.works
          link
          fedilink
          English
          arrow-up
          3
          ·
          2 hours ago

          Yeah this is something a well trained neural network would make simple though. So long as you have the processing power, and enough storage.

          I’d imagine you’d be able to purchase some identifying information from data brokers and eventually link ids to people or families.

          • toast@retrolemmy.com
            link
            fedilink
            English
            arrow-up
            1
            ·
            2 hours ago

            Yes and no, I think. It isn’t really huge amounts of data, and the patterns aren’t super complex, so a neural network would pick up a lot. But, given how far the signals travel, the intermittent nature of the signals, and how little they can initially be associated with a particular vehicle, I think in most environments associating a particular set of signals with a particular car would require some human field work. Sure, there are circumstances where automated pairing would be trivial (like at a toll booth), but catching signals in the wild and processing by neural net alone might be ok for analyzing traffic patterns while not being enough for surveillance.

    • innermachine@lemmy.world
      link
      fedilink
      English
      arrow-up
      1
      arrow-down
      3
      ·
      5 hours ago

      Thank you. Nobody is tracking your car from the fucking tpms sensors, they’ll just use ur phone or GPS for God’s sake 😂 hell if u put tpms sensors in backwards that’s enough for the car not to read them. Another nothing burger.