Comcast Is Turning Millions of Its Routers Into Motion Detectors

Comcast is activating Wi-Fi motion sensing on millions of compatible Xfinity gateways, allowing the routers to detect movement by measuring disruptions in signals between the gateway and connected devices. The free feature, part of Xfinity Shield, can send activity alerts through the Xfinity app and offers Home, Away, and nighttime monitoring modes without requiring separate motion sensors. The Verge reports: Wi-Fi motion sensing is a technology that has been around for a while, but it's only re