Fall Detector

Fall Detector is a HarmonyOS application that monitors accelerometer and gyroscope data to detect potential fall events. It provides real-time sensor monitoring, configurable detection thresholds, a mock simulation mode for testing, and a fall history log.

• Modern Storage Architecture: Uses ArkData (relationalStore for events, Preferences for config).
• Internationalization (i18n): Full support for English and Turkish languages.
• Wearable Native Integration:
  • Digital Crown: Smooth scrolling support.
  • Haptic Feedback: Tactile feedback for clicks, state changes, and emergency alerts.
• Optimized UI: Tailored for circular and small-form-factor wearable displays (220x220).
• Battery Efficient: Balanced sensor polling and strict lifecycle management.

Preview

Use Cases

• Start / Stop Fall Monitoring
• View live sensor values (Accelerometer / Gyroscope)
• Detect falls and show an alert screen
• Review past fall events
• Clear history events
• Adjust detection sensitivity from Settings

Technology

Stack

• Languages: ArkTS
• UI: ArkUI Navigation (NavPathStack, Navigation, NavDestination)
• Sensors: @kit.SensorServiceKit (Accelerometer, Gyroscope)
• Haptics: @kit.SensorServiceKit (Vibrator)
• Storage: ArkData (relationalStore, Preferences)
• Localization: Localization Kit (EN, TR)
• Tools/IDE: DevEco Studio 6.0.0
• SDK: HarmonyOS SDK 6.0.0
• Libraries: Built-in kits only

Directory Structure

entry/
└── src/
└── main/
├── ets/
│ ├── pages/
│ │ ├── Index.ets
│ │ ├── HomePage.ets
│ │ ├── SettingsPage.ets
│ │ ├── HistoryPage.ets
│ │ └── AlertPage.ets
│ ├── services/
│ │ ├── SensorService.ets
│ │ ├── HapticService.ets
│ │ └── DetectionEngine.ets
│ └── store/
│ └── FallStore.ets
└── resources/
├── base/
├── en_US/
└── tr_TR/

Constraints and Restrictions

Supported Device

• Huawei Watch 5 / Universal Wearable (Circular & Rectangular)

App Limits

• On-device processing (no backend)
• Requires sensor permissions:
  • ohos.permission.ACCELEROMETER
  • ohos.permission.GYROSCOPE

License

Fall Detector is distributed under the terms of the MIT License See the LICENSE for more information.