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

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

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.

Off-grid point to point (Not Mesh) Bluetooth Coded PHY SOS system with AES-256 encryption with a range of 1km+ all on your android phone. Fully architected and coded by Gemini 3 Pro AI.