Can an ESP32 detect people without cameras or motion sensors? Discover how Wi-Fi signal disturbances, CSI, and smart DSP enable real-time occupancy and mov ...

Ty Pendlebury is CNET's senior editor for TV and home audio, and author of the daily Insider newsletter. He has rigorously tested, reviewed and written about AV equipment for the company since 2006.

What you need: ruler, protractor, pencil and paper. Use these to construct a triangle when you know the length of 1 side and the 2 angles at each end of it. In this case use the length 8 cm, and the ...