How do you audit your home Wi-Fi network? You could log into your router and have a look at the connected devices. You might find an unexpected device, but a little more digging will usually lead you to a forgotten device laying around the house.

The system uses a network of Raspberry Pis which sniff the WiFi probe requests from WiFi-enabled devices and sends these parcels to a central server which compiles and forwards the fingerprint to the FIND server which then uses machine learning to classify the location based on the unique WiFi fingerprints.

Find more at GitHub