OUI-SPY // Web Flasher

Install3 steps

Plug the board in

Use a real USB-C data cable — charge-only cables won't show up as a serial port. If it's your first flash, hold the BOOT button while plugging in.

Click Flash and pick your board

Chrome, Edge, or Opera on desktop. Your browser will show a list of serial ports — pick the XIAO. The install takes about 30 seconds.

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Listen for 4 ascending beeps

The board reboots on its own. Four beeps means the firmware is up. You'll land in the Boot Selector — join the Wi-Fi below, open the dashboard, and pick a mode.

ModesBoot Selector + 4 tools

[ 0 ]

Boot Selector

The menu you land in after every flash. Pick a mode, edit AP credentials, reboot into it. Hold BOOT ~1.5s from any mode to come back here.

Wi-Fi: oui-spy
Password: ouispy123
Open: http://192.168.4.1

[ 1 ]

Detector

BLE watchlist — alerts on OUI prefix, full MAC, device name, 16-bit service UUID, and company ID. Ships with the OUI Database: Ring, Axon, Flock Safety, DJI, Parrot, Skydio, and Meta/Ray-Ban.

Wi-Fi: snoopuntothem
Password: astheysnoopuntous
Open: http://192.168.4.1

[ 2 ]

Foxhunter

RSSI proximity tracker for a locked BLE target. Buzzer cadence speeds up as you close — like a Geiger counter for Bluetooth.

Wi-Fi: foxhunter
Password: foxhunter
Open: http://192.168.4.1

[ 3 ]

Flock-You WiFi

Passive 2.4 GHz promiscuous sniffer for Flock Safety cameras. addr2 OUI, addr1 OUI, and the DeFlockJoplin wildcard-probe signature. SPIFFS-persisted with USB-CDC dump commands for the Flask dashboard.

Wi-Fi: no AP
Access: USB-CDC + Flask dashboard

[ 5 ]

Sky Spy

FAA Remote ID / Open Drone ID (ASTM F3411) beacon capture. Pulls serial, operator ID, lat/lon, altitude, speed, and heading from every ODID message type.

Wi-Fi: no AP
Access: serial JSON out

Troubleshootingcommon snags

Nothing shows up in the port picker

Try a different USB-C cable (charge-only won't work), install CH340 or CP210x drivers if your OS doesn't auto-detect, or hold BOOT while plugging in to force download mode.

Flash finished but I hear no beeps

The buzzer might be muted on the selector page. The board is fine — join the oui-spy Wi-Fi and confirm the dashboard loads at 192.168.4.1.

Wrong dashboard after switching modes

Your phone auto-reconnected to a saved OUI-SPY network from a different mode. Forget the old network in Wi-Fi settings, or disable auto-connect for all OUI-SPY APs.

Detector AP disappeared after locking config

That's intentional — locking is a one-way seal. Hold BOOT during power-on to clear the lock and restore the config AP. Reflashing does not unlock it; NVS survives a reflash.