ESP32 promiscuous callback parses 802.11 management frames (probe requests
+ beacons), extracts source MAC OUI, and checks against wifi_mac_prefixes[]
table. Deferred alert pattern avoids calling delay()/tone() from WiFi task.
AP dashboard continues serving at 192.168.4.1 while scanning.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
OUI Spy Unified Blue is by colonelpanichacks, not lukeswitz.
Full lineage: wgreenberg (flock-you BLE research) ->
colonelpanichacks (OUI Spy unified multi-mode firmware) -> Dantir.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>