QuadRF can spot drones and see WiFi through my wall
Summary
Jeff Geerling reviews the QuadRF handheld phased-array RF system built around a Raspberry Pi 5, capable of spotting drones and visualizing WiFi through walls. The piece covers setup, the AR visualizer, MIPI-based high-bandwidth I/Q streaming, and a test flight, while noting potential privacy implications and the crowdfunding nature of the project.