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60GHz radar finally solved the problem that's been killing smart home lighting for years
(www.xda-developers.com)
For the discussion of smart homes, home automation and the like. Because of the instance it will tend to have a more UK flavour but everyone is welcome.
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Yah, potential privacy nightmare, but super useful. A quick look on Ali turned this up, which uses ESPHome (open source) firmware for < $AU50. As long as it's in an internet disconnected IoT WLAN network (you do have one of those, right?) I see little risk. The risk will come with phone app enabled crapware versions that are incoming right now I expect.
I actually have a 24Ghz version waiting to be connected to an ESP32 in my to be done drawer, but I may well leapfrog it and grab this instead.