I programmed a $7 ESP32-S3 board to block all computer's web ads - and it took just minutes

I built a whole-home ad blocker with a $7 ESP32-S3 board - and it took just minutes ...
Elektor Magazine

Wi-Fi-Based Person Detection on an ESP32: When Your Router Becomes a Motion Sensor

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 ...