# Offline_SOS_System

> Source: <https://dev.to/annaraokoduri/offlinesossystem-2bdp>
> Published: 2026-08-23 05:24:26+00:00

**Pub.dev Package:** [Link](https://pub.dev/packages/offline_sos_system)

**GitHub Repository:** [Link](https://github.com/bhagyaprasad92/offline_sos_system)

Imagine getting into a serious car crash in a remote area—a mountain pass, a highway dead zone, or a rural road with **zero cell signal**.

You open your safety app, or its automated background trigger fires... only to hang indefinitely because it relies on a cloud API to process sensor data or verify the crash.

That single point of failure bugged me for months. Emergency safety features shouldn’t depend on a stable 5G connection. If an engine can detect a crash instantly via onboard physics, our software should be able to do the same on-device.

So, I built and open-sourced ** offline_sos_system**—a pure Dart, 100% offline crash detection engine powered by on-device TensorFlow Lite.

Most existing Flutter solutions for safety or impact detection suffer from one of three issues:

`G-force > X`

spikes, leading to massive false-positive rates (like dropping your phone on a table or hitting a pothole).I wanted a solution that was **pure Dart/Flutter at the developer layer**, handled complex multi-axis motion patterns via **Edge AI**, and **never made a single network request**.

The package handles the entire pipeline locally on the device:

`tflite_flutter`

.Here is how simple it is to initialize and listen for crash events in Flutter:

```
dart
import 'package:offline_sos_system/offline_sos_system.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Initialize the offline SOS engine
  final sosEngine = OfflineSosSystem();
  await sosEngine.initialize();

  // Listen to real-time crash detection events
  sosEngine.crashStream.listen((CrashEvent event) {
    if (event.isCrashDetected) {
      print('CRASH DETECTED!');
      print('Confidence Score: ${event.confidence}');
      print('Impact Force: ${event.gForce}G');

      // Trigger your app's local emergency protocols here
    }
  });

  // Start monitoring sensor telemetry
  await sosEngine.startMonitoring();
}
```