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Comcast activates Wi-Fi motion sensing on Xfinity routers at no extra cost
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Comcast is enabling motion detection via Wi-Fi signal disruptions on its XB7 and newer Xfinity gateways, integrated into the Xfinity app without additional hardware or fees.
This change repurposes existing customer hardware for motion sensing, reducing the need for dedicated smart home devices. For engineers, it highlights the growing viability of Wi-Fi-based sensing as a low-cost, scalable solution, but also raises questions about accuracy, privacy, and edge-case reliability.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Motion detection relies on Wi-Fi signal disruptions between the router and connected devices, requiring no new hardware.
The feature is opt-in and limited to Xfinity gateways XB7 or newer, integrated into the Xfinity app’s security modes.
Comcast positions this as a basic security tool, not a replacement for traditional systems, but hints at future advanced use cases.
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