heartbeat-sentinel
A Raspberry Pi + SDR system that monitors fundamental real-world signals to detect whether civilization is operating normally without relying on the internet as a single source of truth.
This project combines radio sensing, network heartbeat checks, independent infrastructure signals, and logic/anomaly analysis to build a doomsday detector.
Why?
Modern systems fail quietly. Networks hide outages behind cached UIs. Cloud services collapse silently. News can lie, physics can’t.
This project asks one simple question:
“Is the world still running — or am I just offline?”
Status
Work in progress — open build
Core Signals Monitored
| Category | Indicator |
|---|---|
| Internet | Global routing / DNS roots / multi-continent ping… |
heartbeat-sentinel
A Raspberry Pi + SDR system that monitors fundamental real-world signals to detect whether civilization is operating normally without relying on the internet as a single source of truth.
This project combines radio sensing, network heartbeat checks, independent infrastructure signals, and logic/anomaly analysis to build a doomsday detector.
Why?
Modern systems fail quietly. Networks hide outages behind cached UIs. Cloud services collapse silently. News can lie, physics can’t.
This project asks one simple question:
“Is the world still running — or am I just offline?”
Status
Work in progress — open build
Core Signals Monitored
| Category | Indicator |
|---|---|
| Internet | Global routing / DNS roots / multi-continent ping |
| Power | Local AC sentinel device |
| Wireless presence | Nearby Wi-Fi SSIDs vs house power |
| Broadcast | FM carriers, DVB-T multiplexes |
| Cellular | GSM beacon presence (SDR) + attach checks (modem) |
| Air traffic | ADS-B aircraft beacons |
| Navigation / Space | GNSS lock & satellite count |
| Amateur radio | APRS / ham packet presence |
What makes this different?
- Multiple independent, physics-based signals
- Avoids “internet tunnel vision”
- Anti-false-positive logic
- Optional local LLM for anomaly explanation
- Edge-resilient: works in total internet outage
- Technological existentialism with engineering discipline
Contributing
Ideas and data welcome — this project is about citizen resilience engineering.
Civil Ethics Notice
This project exists to promote civil resilience, transparency and peace. Do not use it for fearmongering, coercion, surveillance, or harm.
If you build, build for humanity.