emergency-communication

A curated list of open protocols, applications, hardware, and resources for communication during internet shutdowns, disasters, intermittent connectivity, and off-grid operation.

Offline-first disaster communication platform. End-to-end encrypted messaging, voice and video calls, and rescue coordination — over Bluetooth with zero infrastructure, and over the internet when a network is reachable. Available on Google Play and App Store.

📡 离线近场安全通信：无基站无网络，蓝牙 Mesh 组网 + Wi-Fi Direct 双链路，端到端加密（ECDH P-256 + AES-256-GCM），一键紧急抹除 / Offline near-field secure messaging over BLE mesh + Wi-Fi Direct, E2EE, emergency wipe.

Off-grid IR mesh network that retrofits solar street lamps for disaster communication — gradient routing, no power grid, no mobile network needed.

Biper: a radio cube a scared person can use. MeshCore fork for M5Stack Unit C6L — phone panel from the cube's own flash, PL-first.

Documentation of the gap between mobile D2D capability and accessibility. Your phone can communicate kilometers without towers. It's disabled by design.

Private off-grid LoRa messaging for Android. An independent, hardened MeshCore client: no servers, no accounts, no Google Play Services. Encrypted history, verified adverts, in-app firmware updates over Bluetooth.

Offline Android BLE mesh messenger for internet blackouts, hiking and off-grid groups—with end-to-end encrypted DMs and QR-approved Trusted Circles.

An Android prototype exploring offline emergency communication, community message relaying, and disaster coordination.

Offline communication hub for disaster relief inspired-by-piratebox- Deploy chat, file sharing, and tactical mapping on DD-WRT routers

Offline communication server (Wi-Fi + captive portal) in Elixir/Phoenix/Nerves for communities without internet in Palestine 🇵🇸

2A-Lite is a minimal, low-cost offline emergency communication prototype using ESP32 (ESP-NOW). It supports one-way emergency messages with acknowledgements, measures round-trip latency (RTT) and packet success rate vs distance, and is intended as a reproducible undergraduate research project.