Comcast has recently introduced a new feature to its Xfinity routers that converts them into motion detectors using only Wi-Fi signals. It's called “WiFi Motion" and it works by sensing disruptions in signal strength between your router and nearby devices to detect movement. The idea is that when someone moves through the signal field—say, between your PlayStation and router—it registers that as motion and sends you an alert through the Xfinity app.
Unlike cameras or radar sensors, this setup doesn’t need extra hardware. It operates purely based on signal interference and can even detect small movements, such as a raised arm. Xfinity claims it can distinguish between a pet and a person, and you can customize the system's sensitivity or the frequency of notifications. It supports up to three devices at once, allowing you to link a computer, a printer, and a gaming console to facilitate tracking.
