See the signals.
Remember the encounters.
Sotreus is a private instrument for the space around you. An Android app — with a pocket Edge companion — that shows what nearby electronics are broadcasting, remembers what you have encountered before, and adds airspace and orbital context.
The world is increasingly instrumented. The individual still lacks a dashboard for it.
Surveillance no longer has a single shape. Cameras, doorbells, trackers, access control, beacons, drones, vehicle electronics, building sensors and aircraft all add to an environment that is electronically dense — and hard to read.
The problem is asymmetry. Infrastructure can sense, log and correlate. The person moving through it usually has no comparable view.
Sotreus closes part of that gap — honestly, and only with what your devices can legitimately observe.
Walk into any space. Get five answers.
Your Android phone is the first sensor. Sotreus observes nearby Bluetooth LE and visible Wi-Fi, learns what is normal for a place, and keeps the evidence on your device.
- 01
What is here?
How many radios and device families are visible right now.
- 02
What is familiar?
What matches this place, or devices you have already tagged as yours or expected.
- 03
What changed?
What is new, unusually persistent, or different from your previous visits.
- 04
What have I seen before?
Which tagged or fingerprinted entities have appeared somewhere else.
- 05
What is around or above me?
Nearby aircraft, drone Remote ID broadcasts and satellite passes — when you turn context on.
A scanner shows you a list. Sotreus remembers.
The meaningful question is not only “what is nearby?” but “have I encountered this before?” Local memory turns a noisy stream of radios into something you can read.
Familiar
Matches this place’s baseline or a device you have marked as yours or expected.
New
Not seen in this place before. Most new things are ordinary — Sotreus simply notes them.
Persistent
Present for an unusually long stretch of a session, rather than passing through.
Re-encountered
A distinctive fingerprint seen again in a different, unrelated place.
Look around. Then look up.
Electronic awareness does not stop at the walls of a room. When you choose, Sotreus places aircraft, drone broadcasts and satellite passes on the same timeline as your local observations — and never blurs where each one came from.
Observed directly by your phone or Sotreus Edge — BLE, Wi-Fi and compatible Remote ID broadcasts.
Reported by an external provider over the internet. Always shown with its source and data age.
Computed on your device from public orbital elements. Your location never leaves the phone.
One timeline. Three kinds of source.
Sotreus may say events overlapped in time. It will never say one caused the other. Temporal correlation stays temporal correlation.
- 21:39New BLE fingerprint observed
- 21:41Tagged device re-encountered
- 21:42Aircraft passed within the selected radius
- 21:44BLE fingerprint no longer observed
- 22:07Satellite pass overlapped this session
- An aircraft overhead is not proof of surveillance.
- A satellite pass is not proof of imaging.
- A drone broadcast is not proof of intent.
Awareness without alarmism.
Sotreus does not promise to find every camera or tell you who is watching. It gives you evidence — radio signatures, recurrence, proximity patterns, known device families and changes in a place — and shows the source of each.
You decide what that evidence means.
| OTHER APPS SAY | SOTREUS SAYS |
|---|---|
| Needs attention | |
| Camera-family signature observed | |
| Repeated cross-location re-encounter observed | |
| Aircraft reported within selected radius | |
| Selected satellite predicted overhead | |
| Remote ID broadcast observed | |
| Nothing observable on supported bands | |
| Last observation · data freshness |
A pocket companion that keeps observing when your phone can’t.
Sotreus Edge scans, timestamps and stores on its own battery, then syncs to the app over Bluetooth. The app stays the brain. Edge becomes the always-on sensing layer.
Edge Mode — the everyday default. Continuous or duty-cycled BLE and 2.4 GHz Wi-Fi observation, a local append-only log, optional GNSS, and no LoRa transmission.
- COMPUTE
- ESP32-S3
- Runs Edge firmware, scan scheduling and secure app sync.
- BLUETOOTH
- Bluetooth 5 LE
- Observes advertisements and pairs with the app.
- WI-FI
- 2.4 GHz 802.11 b/g/n
- Visible 2.4 GHz access points. Not 5 or 6 GHz.
- LORA
- SX1262
- Meshtastic in Mesh Mode. Silent in Edge Mode.
- LOCATION
- Optional GNSS
- Anchors observations when your phone isn’t there.
- STORAGE
- 8 MB flash
- Append-only observation log with bounded retention.
- DISPLAY
- 0.96″ OLED
- Mode, sensor health, battery and scan counts at a glance.
- POWER
- Own battery
- Field power profiles, so your phone pays nothing.
The app gets more capable when Edge is present.
Honest boundary: Edge is not an ADS-B or satellite receiver. Aircraft context stays network-reported and orbital context stays predicted.
PROTOTYPE BASELINE · HELTEC WIFI LORA 32 V3
| PHONE ONLY | PHONE + EDGE |
|---|---|
| Observation depends on Android scan cadence and power policy. | Edge keeps its own schedule while the phone sleeps. |
| A journey can lose coverage when the app is constrained. | Edge keeps logging and syncs the full session later. |
| Phone location is the only location source. | External GNSS anchors Edge observations independently. |
| Battery cost is paid by the phone. | A dedicated battery isolates the sensing workload. |
| No LoRa hardware. | The same node switches to Meshtastic for off-grid comms. |
Privacy is architecture, not a setting.
An awareness tool fails if it becomes another opaque collector. Sotreus is built so it can’t.
No account required
Scanning, memory, tagging and reports work without signing up for anything.
Local database first
No mandatory cloud. Your radio history and places stay on your device, with optional encryption at rest.
Context is opt-in
Aircraft and orbital feeds are modules you switch on. Local sensing works fully offline.
Your location, your call
Sky queries run in Exact area, Coarse area or Off. Satellite passes are computed without sending your location anywhere.
Share safely
Exports default to coarse coordinates, time buckets and hashed identifiers.
You set retention
Keep everything, keep N days, keep tagged only — or delete a place or session outright.
Receive-only. Always.
Sotreus listens to what is broadcast. It never interferes with anyone else’s systems.
Sotreus never:
- DEAUTHENTICATE
- INJECT
- JAM
- EXPLOIT
- INTERROGATE
From the phone in your pocket to a personal context graph.
- V1 · PHONE
Android sensing + memory
BLE + visible Wi-Fi · Encounter memory · Places + journeys · Tagging + signatures · Evidence-based attention
- V1.1 · CONTEXT
Airspace, drones + orbit
Aircraft / ADS-B data · Drone Remote ID · Satellite pass prediction · Public situational feeds
- V2 · SOTREUS EDGE
Always-on companion
ESP32-S3 + BLE + 2.4 GHz Wi-Fi · Local storage + optional GNSS · Continuous observation · Mesh Mode via Meshtastic
- FUTURE
Personal context graph
Local radios + sky + orbit + trusted nodes, across time and place
“What is different here, what is around or above me, and have I seen any of it before?”
Sotreus answers with evidence, provenance, confidence, freshness — and restraint. Join early access for the Android app and the first Sotreus Edge field units.
Follow progress on X · @netsepio