Radio & the Invisible Spectrum: SDR, Mesh & RFintermediate · ~200 min

The Quiet Census — Count What's Broadcasting Around You Without Transmitting Once

You can open your router's admin page and see a list of names you half recognise — but it cannot tell you how strong a device's signal is, when it first showed up, or how much is quietly broadcasting around you that never joined your network at all. This project builds the honest version of that view: a listener that never transmits, counts what it can genuinely count, and says out loud where its own answer stops being reliable.

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What you'll do

A receive-only wireless census running on your own machine that Claude Code wrote — a monitor-mode Wi-Fi listener and a passive Bluetooth LE listener feeding one local store — which counts distinct-looking broadcasters near you, separates devices that are actually on your network from ambient passers-by, alerts you the first time a genuinely new device joins your own Wi-Fi, and labels every count with what MAC randomisation does and does not let you claim.