Meshtastic
Cheap radios that send text messages with no signal, no WiFi and no internet.
What you can do with it
- Stay in contact off-grid
- Festivals, hiking and emergencies
The full tutorial
01How the mesh works, and which boards to buyFREE02Flash Meshtastic onto the boardsMEMBERS03Pair your phone and set the regionMEMBERS04Make a private, encrypted channel for your groupMEMBERS05Build a solar repeater for your roofMEMBERS06Bridge the mesh into your own serverMEMBERS07Use it for realMEMBERS
Text people with no phone signal: build your own LoRa mesh · ~210 min · tested
Open missionMore in Off-grid & resilience
SatDump
Off-grid & resilience
Decode real images from weather satellites with a cheap USB radio.
Project NOMAD
Off-grid & resilience
An offline knowledge server: Wikipedia, books, courses, maps and optional local AI.
Kiwix
Off-grid & resilience
Download Wikipedia, medical guides and more as single files and read them offline. No account needed.