OFF GRID SOS IOT COMMUNICATION SYSTEM

When people travel into remote areas, losing cellular service is common, but in emergencies this lack of connectivity can be life-threatening. This research presents the OffGrid SOS IoT system, an autonomous communication device that operates independently of internet and cellular networks. The system integrates an ESP32 microcontroller with GPS and LoRa modules to transmit distress signals over long distances. Edge AI is embedded directly into the device to process motion data from an IMU and detect hard falls, while also recognizing predefined panic keywords using a built-in microphone. Upon detecting a potential emergency, a countdown timer is triggered to minimize false alarms. If not canceled, the system transmits encrypted GPS coordinates to nearby rescue nodes. Powered by a Li-ion battery, the device ensures privacy, energy efficiency, and reliable communication in zero-network zones.