A modular system that bridges ham radio with the NOSTR protocol, enabling fully off-grid social communication and economic activity.
No internet required
HF, VHF, or mesh
With internet access
Global decentralized social
When communications are restricted—whether by governments, infrastructure failure, or remote locations—HAMSTR keeps you connected.
No ISP required. No government can block it. Ham radio operates on frequencies that bypass traditional internet infrastructure entirely. Your communications remain unstoppable.
When hurricanes, earthquakes, or other disasters take down cell towers and internet, ham radio still works. HAMSTR ensures critical information flows when it matters most.
With Reticulum integration coming soon, HAMSTR will enable self-healing mesh networks over LoRa and other protocols. Build resilient, distributed communication infrastructure.
Post, reply, boost, and quote notes. Search by hashtag or npub. Follow feeds and discover the global network—all without internet.
World's first implementation of Lightning payments over ham radio with full NIP-57 compliance. Your zaps appear instantly in all NOSTR clients.
Works with VARA HF, legacy packet radio TNCs (hardware and software like Direwolf), and upcoming Reticulum mesh networking.
All cryptography and event signing happens client-side. Server is completely keyless and acts as a pure passthrough relay.
Protocol-agnostic design means adding new radio transports is straightforward. Each protocol runs as an isolated module.
Despite lower speeds (300-600 baud HF), ham radio can reach anywhere on Earth. Multiple protocols ensure robust message delivery.
In oppressive regimes, economic freedom is as critical as free speech. HAMSTR enables Bitcoin transactions when internet access is blocked or unavailable.
Send Lightning zaps completely offline via ham radio. Full NIP-57 compliance means your payments appear instantly across the entire NOSTR ecosystem.
Ecash send and receive while completely offline. Privacy-preserving electronic cash that works without any internet connection.
Send Bitcoin transactions and check wallet balances over ham radio. Complete financial sovereignty without internet infrastructure.
HAMSTR's modular architecture supports multiple radio transports, from legacy packet systems to modern digital modes and upcoming mesh networks.
| Protocol | Speed | Error Correction | Connection Type | Best For | Status |
|---|---|---|---|---|---|
| VARA HF | 17-600 bps adaptive | Built-in ARQ | USB/Serial | HF long-distance, most users | ✓ Working |
| Packet Radio (TNC) | 300-1200 baud | Custom HAMSTR ARQ | Serial, USB, Bluetooth | VHF/UHF, legacy equipment | ✓ Working |
| Direwolf (Software TNC) | 300-1200 baud | Custom HAMSTR ARQ | TCP/IP, USB | Software-defined radio, cost-effective | ✓ Working |
| Reticulum Mesh | Varies by transport | Built-in encryption | LoRa, packet, TCP/IP | Mesh networks, unlicensed spectrum | ⧗ Coming Soon |
| FLDIGI | Multiple PSK/RTTY modes | Mode-dependent | TCP/IP | Flexible digital modes | ⧗ Coming Soon |
"The OpenSats Committee was very impressed with your proposal and HAMSTR"
— OpenSats Grant Committee
Click to watch on YouTube
Ready to run unstoppable infrastructure? Here's what you need.
Complete documentation, setup instructions, and troubleshooting
