That was surprisingly interesting.
Comment on I wonder what the specs are on the technology that disables shopping cart wheels
seathru@lemmy.sdf.org 3 weeks ago
Here’s a decent rundown.
QuarterSwede@lemmy.world 3 weeks ago
felixwhynot@lemmy.world 3 weeks ago
The hacker who did the Def Con talk linked in the Hackaday article also did another one, they are both very interesting
rumba@lemmy.zip 2 weeks ago
Yeah, I just watched a youtuber take apart a modern one. Found the maker and the manual for the system. Then watched some more people taking the system apart (including the one you linked)
Neat stuff:
Looks like it’s <9 Khz signals (7.2khz in the one I looked up), at that frequency, you can do a replay attack using your phones speaker from 0 distance.
the electronics in the wheels are potted, including the battery so they’re disposable at EOL.
Apparently, the unlock signal is just an inverted lock signal. Easily detectable.
Their system has the ability to lock/unlock all carts, only the carts left in the parking lot overnight.
One of the features available is for them to identify and freeze a particular cart if it doesn’t go through a checkout.