WiFi routers can see people through walls. Here’s how it works (www.zmescience.com)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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cross-posted from: https://lemmy.kevitprojects.com/post/8452

What do you guys think about this?

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[-] [email protected] 1 points 1 year ago

There are old household alarm systems based on this tech from the 70's. I think there were two components - VHF transmitters, and a receiver -- and if the receiver detected an change in the receiving pattern, it was because something moved between a transmitter and the receiver, and it would trigger.

Fuck I'm old.

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this post was submitted on 29 Jul 2023

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