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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] 2 points 1 year ago

Some consumer wifi company - linksys eero possibly? - some years ago was rolling out a home security feature which used signal differences in the mesh links to detect movement in the house. Not quite 1:1 with mapping, but similar.

There's been a bunch of "wifi as passive radar" in academic stuff for 10+ years, but w/out the modern image recognition stuff to boost it; most of if lacked public attention due to either academic paywalls or the difficulty of obtaining SDR gear in any affordable way at the time.