A complete solution for simultaneous data collection from multiple biosensors, supporting real-time data acquisition, transmission, and storage from devices suMQTT message format for all sensors:

这是一个用于同时采集多种生物传感器数据的完整解决方案，支持眼动仪、脑电图(EEG)和腕带(PPG)等设备的实时数据采集、传输和存储。

.
├── source/
│   ├── common/          # Common utilities and data structures
│   ├── sensors/         # Sensor device implementations
│   │   ├── include/    # Sensor interface definitions
│   │   └── src/        # Concrete sensor implementations
│   │       ├── eye/    # Eye tracker device
│   │       ├── egg/    # EEG device
│   │       └── wristband/ # Wristband device
│   └── testCase/       # Test cases
├── script/             # Build and utility scripts
├── server/            # Server implementation
│   ├── src/           # Server source code
│   └── README.md      # Server documentation
├── thirdParty/        # Third-party dependencies
└── build/             # Build output directory

• Eye Tracker (眼动仪)
• EEG Device (脑电图设备)
• Biosensor Wristband (生物传感器腕带)

The system uses SQLite for data storage with the following schema:

-- Device registration table
CREATE TABLE devices (
    device_id INTEGER PRIMARY KEY,
    device_type TEXT,
    name TEXT,
    channels INTEGER,
    sampling_rate REAL,
    description TEXT,
    created_at DATETIME
);

-- Sensor data table
CREATE TABLE sensor_data (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    timestamp DATETIME,
    device_id INTEGER,
    channel_number INTEGER,
    value REAL,
    FOREIGN KEY(device_id) REFERENCES devices(device_id)
);

{
    "device_id": "string",
    "timestamp": "ISO8601 string",
    "values": [ ]
}

• CMake (>= 3.10)
• C++17 Compatible Compiler
  • Windows: Visual Studio 2019 or 2022
  • Linux: GCC 7.0 or higher
  • macOS: Clang 8.0 or higher
• MQTT Broker (Mosquitto)
• Python 3.7+
  • paho-mqtt
  • sqlite3

1. Ensure Visual Studio 2019/2022 is installed (with C++ development tools) 确保已安装 Visual Studio 2019 或 2022（需要包含 C++ 开发工具）
2. Install CMake (download from https://cmake.org/download/) 安装 CMake（可从 https://cmake.org/download/ 下载）
3. Use build script: 使用构建脚本：

   # Normal build 普通构建
   script\build.bat
   
   # Clean and rebuild 清理并重新构建
   script\build.bat -c

1. Using build script (recommended): 使用构建脚本（推荐）：

   # Normal build 普通构建
   ./script/build.sh
   
   # Clean and rebuild 清理并重新构建
   ./script/build.sh -c

2. Manual build: 手动构建：

   mkdir -p build
   cd build
   cmake ..
   make

1. Install MQTT broker: 安装 MQTT 服务器：

   sudo apt-get install mosquitto mosquitto-clients

2. Install Python dependencies: 安装 Python 依赖：

   cd server
   pip install -r requirements.txt

3. Start the MQTT broker: 启动 MQTT 服务器：

   sudo systemctl start mosquitto
   sudo systemctl enable mosquitto

4. Start the data collection server: 运行数据采集服务器：

   cd server
   ./script/server.sh start

1. Run comprehensive test: 运行综合测试：

   cd build/source
   ./test_all

2. Individual sensor tests: 单个传感器测试：

   # Eye tracker test 眼动仪测试
   ./test_eye
   
   # EEG device test 脑电图测试
   ./test_egg
   
   # Wristband test 腕带测试
   ./test_wristband

MQTT message format for all sensors: 所有传感器的 MQTT 消息格式：

{
    "device_id": "string",
    "timestamp": "ISO8601 string",
    "values": ["", "", ""]
}

Database schema: 数据库结构：

-- Device registration table 设备注册表
CREATE TABLE devices (
    device_id INTEGER PRIMARY KEY,
    device_type TEXT,
    name TEXT,
    channels INTEGER,
    sampling_rate REAL,
    description TEXT,
    created_at DATETIME
);

-- Sensor data table 传感器数据表
CREATE TABLE sensor_data (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    timestamp DATETIME,
    device_id INTEGER,
    channel_number INTEGER,
    value REAL,
    FOREIGN KEY(device_id) REFERENCES devices(device_id)
);

1. MQTT Connection Issues MQTT连接问题

   • Check if the MQTT broker is running: systemctl status mosquitto
   • Verify MQTT port (default 1883) is open: netstat -an | grep 1883
   • Check MQTT logs: tail -f /var/log/mosquitto/mosquitto.log

2. Device Connection Issues 设备连接问题

   • Check USB permissions (for eye tracker)
   • Verify Bluetooth is enabled (for EEG and wristband)
   • Check device battery level
   • Ensure correct device IDs are configured

3. Database Issues 数据库问题

   • Verify database file exists: server/data/sensor_data.db
   • Check file permissions
   • Run integrity check: sqlite3 server/data/sensor_data.db "PRAGMA integrity_check;"

4. Build Issues 编译问题

   • Verify CMake version: cmake --version
   • Check compiler version:

     g++ --version    # Linux
     clang++ --version # macOS

   • Ensure all dependencies are installed