A complete step counting system consisting of an ESP32 device with MPU6050 accelerometer and a React Native mobile application with native Bluetooth Low Energy (BLE) integration.

For detailed technical specifications, architecture overview, and implementation details, see: PROJECT_SPECIFICATION.md

• Node.js 18+
• Expo CLI
• Arduino IDE with ESP32 support
• XIAO ESP32-C3 board
• MPU6050 accelerometer sensor

1. Connect MPU6050 to ESP32:

   • VCC → 3.3V
   • GND → GND
   • SDA → GPIO6
   • SCL → GPIO7

2. Connect Reset Button:

   • One terminal → GPIO2
   • Other terminal → GND

3. Upload Arduino Code:

   # Open arduino/step.ino in Arduino IDE
   # Install required libraries: BLEDevice, Wire
   # Upload to XIAO ESP32-C3

1. Install Dependencies:

   npm install

2. Start Development Server:

   npx expo start

3. Run on Device:

   # iOS
   npx expo run:ios
   
   # Android
   npx expo run:android

• ESP32 (Arduino): Step detection using MPU6050 accelerometer
• React Native: Cross-platform mobile application
• TurboModules: High-performance native BLE integration
• CoreBluetooth: iOS Bluetooth Low Energy framework

• ✅ Real-time step counting
• ✅ Bluetooth Low Energy communication
• ✅ Automatic device discovery and connection
• ✅ Step counter reset functionality
• ✅ Debug logging and error handling
• ✅ Modern React Native architecture

• BLE Service UUID: 4fafc201-1fb5-459e-8fcc-c5c9c331914b
• Characteristic UUID: beefcafe-36e1-4688-b7f5-00000000000b
• Sampling Rate: 50Hz
• Device Name: "Step-Sense"

• Bundle ID: com.expo.reactnativebluetoothesp32
• Minimum iOS: 13.0+
• Minimum Android: API 21+

├── app/                    # Expo Router application
├── native/                 # Native integration layer
├── ios/modules/StepBle/    # iOS BLE implementation
├── arduino/               # ESP32 Arduino code
└── assets/                # Application resources

• React Native 0.81.4 with New Architecture
• Expo SDK 54 with Expo Router
• TypeScript for type safety
• TurboModules for native performance
• CoreBluetooth for iOS BLE

• Expo Documentation
• React Native New Architecture
• CoreBluetooth Framework
• ESP32 BLE Arduino

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Test on both iOS and Android
5. Submit a pull request

This project is licensed under the MIT License.