Another cool thing about WiFi routers is that you can use them as radars to monitor people in a home. The 2.4ghz frequency is perfect for reflecting off water bodies while having great penetration through walls.
NOTE: I'm in no way related to this company or the podcast (aside from being an occasional listener).
Episode page: https://twimlai.com/talk/107
Direct episode link: https://feeds.soundcloud.com/stream/393602724-twiml-twiml-ta...
Episode description:
In this episode I’m joined by Michel Allegue and Negar Ghourchian of Aerial.ai. Aerial is doing some really interesting things in the home automation space, by using wifi signal statistics to identify and understand what’s happening in our homes and office environments.
Michel, the CTO, describes some of the capabilities of their platform, including its ability to detect not only people and pets within the home, but surprising characteristics like breathing rates and patterns. He also gives us a look into the data collection process, including the types of data needed, how they obtain it, and how it is parsed. Negar, a senior data scientist with Aerial, describes the types of models used, including semi-supervised, unsupervised and signal processing based models, and how they’ve scaled their platform, and provides us with some real-world use cases.
Would it be ghostly figures or more like black and white photos?
[1] https://www.medgadget.com/2014/06/mits-wifi-system-detects-p... (June 2014)
[2] https://hackaday.io/project/5452-wifi-thermal-camera (2015)
[EDIT] I stand corrected, [2] is unrelated. My bad! Here's some good sources as alternative.
"MIT turns Wi-Fi Into Indoor GPS New tech from CSAIL lab lets one Wi-Fi device locate another to within centimeters" [3]
"RF-Capture: Capturing the Human Figure Through a Wall
It can know who the person behind a wall is. It can trace a person's handwriting in air from behind a wall. It can determine how a person behind a wall is moving." [4]
They also contain further resources.
[3] https://spectrum.ieee.org/tech-talk/telecom/wireless/mit-tur...
https://m.youtube.com/watch?v=rDC34awd0f8
There are a lot of people doing research in this space:
https://scholar.google.com/scholar?hl=en&as_sdt=0%2C47&q=hum...