emergency-communication

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

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.

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.

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

📡 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.

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.

无网络野外沟通：手机之间只靠 BLE 自组多跳 Mesh，传文本、快捷符号、小图片、Codec2 条式语音、定位与 SOS、连续轨迹记录包。无服务器、无账号、全程离线。Android · Kotlin · Compose · WLP/1 协议

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

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

Meshtastic-basiertes Notmeldeterminal fuer abgesetzte Standorte ohne Mobilfunk-/Internetanbindung -- Teil des kayna-funkt-Notmeldestellen-Projekts

Offline-first crisis messaging prototype: multi-transport routing, store-and-forward and deduplication

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 🇵🇸

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

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.