About This Project

Many disaster-prone regions lack reliable internet for last-mile early warning dissemination. This idea proposes combining low-cost Bluetooth mesh networks (using existing smartphones) with SMS-based alert aggregation to create decentralized community warning networks. When a national EWS issues an alert, it triggers SMS broadcasts to designated community nodes, which then propagate the alert through Bluetooth mesh to surrounding devices — even those without cellular connectivity. The system integrates with existing participatory disaster drill programs and leverages open-source protocols like LoRaWAN for rural areas. Key advantages: works without internet, near-zero marginal cost per additional user, and strengthens community cohesion through participatory design.

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