It beeps at the gear that's watching you.

A pocket-sized ESP32-C5 sweeps Bluetooth and 2.4 + 5 GHz Wi-Fi nonstop, matches what it hears against surveillance hardware, drone Remote ID and trackers, and tells you which one by ear. Plug it in and walk away. The phone is optional.

Reserve one · no money down

Render from the production CAD. Real photos once the first batch is built.

WHAT THE BEEPS MEAN

Every category has its own sound and its own light. No screen to watch: you hear what showed up.

ALPR / cameratwo long
Body camlong short short
Dronerising trill
Trackerfast ticking

Press play with sound on. Render from the production CAD, sound synthesized from the firmware's notes.

WANT TO DETECT

SignalSweep with its LED bar lit orange. Want to detect Axon body cams? — **BODY CAMS**Axon gear, on the air near you.

SignalSweep with its LED bar lit red. Want to detect Flock cameras? License plate readers, when they transmit. — **ALPR**Only when it's talking. See straight answers below.

Renders from the production CAD. Not affiliated with any company named here.

THE APP

The beeps tell you something's there. The app tells you what, how close, and where the drone pilot is standing. Android, or any desktop Chrome or Edge. Free, no account.

The unit's LED bar lit blue for a drone, beside a phone showing the drone and its pilot on a map

Live scope: trackers and a drone in range, strongest first — **LIVE**What's near you right now, strongest first.

Hunting an Apple Find My tracker, signal meter at -57 dBm — **HUNT**Lock on to one device and walk it down by ear.

Map with a Remote ID drone and its pilot's broadcast position — **MAP**A drone's broadcast position, and its pilot's.

Alert settings: sound, lights and which categories beep — **SET IT ONCE**Sound, lights, which alerts beep. Survives power cuts.

Screens staged with a bench test transmitter and a mock location. Phone and unit shot is a render.

WHAT IT CATCHES

DRONES, IN FULL

ASTM Remote ID over Bluetooth and Wi-Fi: ID, altitude, speed, heading, and where the pilot is standing.

TRACKERS

Apple Find My, Google, Samsung and Tile. Hunt one by ear: the beeps speed up as you close in.

SURVEILLANCE GEAR

Flock gear when it's talking, Axon body cams, ShotSpotter. Agency-only hardware beeps on sight.

WHATEVER YOU ADD

Edit the signature list from the app. OUI, company ID, name, UUID or SSID. No recompile.

NO TRAIL

No cloud, no account, no telemetry. The app forgets everything on disconnect.
Receive-only mode stops it announcing itself. It keeps listening and beeping.
No jamming, no spoofing, no injection. It's a receiver.
Open source, GPL-3.0. Read every line before you trust it.

PICK ONE

Every part of the kit laid out on a table: case, lid, carrier board, LED stick, antenna, pigtail, XIAO ESP32-C5, SD module, buzzer, pin headers and screws

KIT

$40

Everything in the bag: XIAO ESP32-C5, carrier board, LED stick, buzzer, dual-band antenna + pigtail, 3D-printed case and screws. You solder it, flash it from your browser, done.

An assembled SignalSweep standing on end, antenna up, LED bar lit

BUILT

$75

Same parts, built for you: soldered, cased, flashed and tested. Plug it in and it's working.

Renders from the production CAD. XIAO ESP32-C5, dual-band. Flat-rate US shipping by USPS. US only for now.

RESERVE ONE

You're on the list. We'll email you when your batch is ready.

That didn't take. Check the email and pick kit or built.

No money now. When the batch is ready you get an email with a pay link. Ignore it and nothing happens.

We store your email, your choice and your note. Nothing else, no trackers on this page. One email when it ships.

STRAIGHT ANSWERS

Every Flock camera? No. It catches Flock gear when it's talking. A camera on LTE with its Wi-Fi off says nothing to anyone.
iPhone? Not yet. Android app, or the web app in desktop Chrome or Edge.
Already have the parts? Flash it free at flash.signalsweep.net.
Legal? It's a receiver. Know your local law.