Meshtastic – Off-grid LoRa mesh for hams and preppers

Meshtastic is an open-source, decentralized, encrypted mesh network running on cheap LoRa hardware.
No cell towers, no internet, no monthly bills — just radios talking to radios over many miles.

Perfect for:

• EmComm when everything else is down
• Ranch/farm sensor networks
• SOTA/POTA activations far from cell coverage
• Rural property monitoring (gates, water tanks, beehives, livestock)
• Disaster early-warning systems

All traffic is end-to-end encrypted and the entire project is 100 % open source.

Official site → https://meshtastic.org