Note: To access all shared projects, get information about environment setup, and view other guides, please visit Explore-In-HMOS-Wearable Index.
A lightweight and smart body-weight tracking application designed for HarmonyOS Next wearable devices. The app reads weight data from Mi Scale 2 via Bluetooth, stores measurements in a local database, and visualizes the user’s weight trends over time.
- Bluetooth Weight Reading
- Automatically receives real-time weight measurements from Mi Scale 2.
- Stable and optimized BLE connection logic.
- Local Data Storage
- All measurements are saved securely using HarmonyOS Relational Database (RDB).
- Users can delete any record by swiping it.
- History Tracking
- Users can browse previously saved records.
- Provides a clean list interface optimized for small wearable screens.
- Weight Trend Visualization
- Displays the latest 10 measurements as a smooth line chart.
- Helps users understand short-term weight changes at a glance.
- Modern UI Components
- Built with ArkUI and wearable-friendly layouts.
- Fluid animations and clean ArcList design.
- Languages: ArkTS
- Frameworks: HarmonyOS SDK 5.1.0(18)
- Tools: DevEco Studio Version 5.1.0
- Libraries:
- @kit.ArkUI
- @kit.ConnectivityKit
- @kit.ArkData
- @mcui/mccharts
├───AppScope
│ └───resources
│ └───base
│ ├───element
│ └───media
├───entry
│ └───src
│ ├───main
│ │ ├───ets
│ │ │ ├───model
│ │ │ │ └───WeightModel
│ │ │ ├───utils
│ │ │ │ ├───PermissionManager
│ │ │ │ └───RdbService
│ │ │ └───pages
│ │ │ ├───Main
│ │ │ ├───Records
│ │ │ └───WeightChart
│ │ └───resources
│ │ ├───base
│ │ │ ├───element
│ │ │ ├───media
│ │ │ └───profile
- Huawei Watch 5
- The data parsing steps for this application have been developed only for Mi Scale 2. For other smart scales, you can use the Open Scale Repository.
Smart Scale is distributed under the terms of the MIT License. See the LICENSE for more information.