CrimsonSDK NodeJS

Requirement

• BLE 4.2 or later
• NodeJS ^16.14.0 || >=18.0.0
• Mac 10.15 or later
• Windows 10 build 10.0.15063 or later
• Raspberrypi OS 5.10

Integration

package.json

"dependencies": {
    "crimson-sdk": "^1.4.0"
},

Usage

Init

let _cmsnSDK;
async function initSDK(onAdapterStateChanged) {
  if (_cmsnSDK) return;
  CrimsonLogger.i('CrimsonSDK.init');

  // eslint-disable-next-line require-atomic-updates
  _cmsnSDK = await CrimsonSDK.init(CMSNLogLevel.enum('info')); //info/error/warn
  _cmsnSDK.on('error', (e) => _runErrorCB(e));
  _cmsnSDK.on('onAdapterStateChanged', async (available) => {
    if (available) {
    //   if (cmsnDeviceMap.size > 0) _startReconnectTimer();
    } else {
      _runErrorCB(CMSNError.enum('ble_power_off'));
      await stopScan();
      //NOTE: 在cmsnDeviceMap中保留，不删除，用于设备重连
      cmsnDeviceMap.forEach(device => device.disconnect(false));
    }
    if (onAdapterStateChanged) onAdapterStateChanged(available);
  });
  if (_cmsnSDK.adapter.available) onAdapterStateChanged(true);
  CrimsonLogger.i('CrimsonSDK.init done');
};

(async function main() {
    CrimsonLogger.i('------------- Example Main -------------');
    await initSDK(async (adapterAvailable) => {
        if (adapterAvailable) await startScan();
    });
})();

Scan 扫描

首次配对新设备时，需要先将头环设置为配对模式-->蓝灯快闪

_cmsnSDK.startScan(async device => { 
    console.log(`found device, [${p.name}] ${p.address}`);
});

Connect 连接

device.listener = exampleListener;
await device.connect();

Disconnect 断开连接

// disconnect device
await device.disconnect();

async function disposeSDK(cb) {
  disconnectAll();
  await CrimsonSDK.dispose();
  _cmsnSDK = null;
  if (cb) cb();
};

// when exit application, disconnect all devices & clean resources
process.on('SIGINT', async () => {
    CrimsonLogger.i({ message: `SIGINT signal received.` });
    await disposeSDK();
    CrimsonLogger.i('End program');
    process.exit(0);
});

async function disconnectAll() {
  cmsnDeviceMap.forEach(device => device.disconnect());
  cmsnDeviceMap.clear();
  await stopScan();
}

ENUM

// 头环连接状态
const CONNECTIVITY = createEnum({
    connecting: 0,
    connected: 1,
    disconnecting: 2,
    disconnected: 3,
});
// 佩戴状态，电极与皮肤接触良好
const CONTACT_STATE = createEnum({
    unknown: 0,
    contact: 1,    //佩戴好
    no_contact: 2, //未戴好
});
// 佩戴方向，检测是否佩戴反
const ORIENTATION = createEnum({
    unknown: 0,
    normal: 1,     //头环戴正
    upsideDown: 2, //头环戴反
});

StartIMU 开启传输陀螺仪数据

// IMU SampleRate
const IMU = {
    SAMPLE_RATE: createEnum({
        unused: 0,
        sr125: 0x10,
        sr26: 0x20,
        sr52: 0x30,
        sr104: 0x40,
    }),
};

device.listener = exampleListener;
device.startIMU(IMU.SAMPLE_RATE.enum('sr104'));

More

class CMSNDevice
    id, 
    name, 
    connectivity,
    connect()
    disconnect()
    pair(cb)
    startDataStream(cb)
    stopDataStream(cb)
    startIMU(sampleRate, cb)
    stopIMU(cb)
    getSystemInfo(cb) 
    shutdown(cb)
    // @param name length should be 4 ~ 18
    setDeviceName(name, cb)
    // @param {(string|number[])} color e.g. string '#FFAABB' or array [255, 0, 0]
    setLEDColor(color, cb)
    // @param timeSec => seconds to put device into sleep mode, 0 for no sleep
    setSleepIdleTime(timeSec, cb)
    // @param intensity => vibration intensity, 0 ~ 100
    setVibrationIntensity(intensity, cb)
}

Electron Docs

see[https://github.com/BrainCoTech/crimson-sdk-docs/blob/main/en/node_electron.md]