Question

由于某种原因，设备无法通过BLE传输数据（心率）。它可以很好地连接，电话应用程序也可以发现服务并连接到服务。

我从iOS和Health应用程序开始，实际上看到了一些数据，因此，它最初可以正常工作。后来，为Android应用程序上的BLE连接创建了基础，它连接得很好，发现了正确的服务并将其连接。而且没有数据。用iOS重新检查，也保持静音。假设这是设备的问题（传感器等故障），请将其带到我从其购买的商店中。经过测试，与ANT +一样具有魅力。因此，它必须是BLE问题。该代码本身就是来自Android开发人员指南的示例代码。

{

//0x180D - heart rate service
//0x2A37 - heart rate characteristic

private static HrmHandler instance;

private static UUID UUID_HRM_SERVICE = UUID.fromString("0000180d-0000-1000-8000-00805f9b34fb");
private static UUID UUID_HRM_CHARACTERISTIC = UUID.fromString("00002a37-0000-1000-8000-00805f9b34fb");

private static String LOG_TAG = HrmHandler.class.getSimpleName();

private BluetoothAdapter mBtAdapter;
private BluetoothDevice mBtDevice;

private String mBtDeviceAddress;

private Context mContext;

public static HrmHandler getInstance() {

    if (instance == null)
        instance = new HrmHandler();
    return instance;
}


public void connect(Context ctx) {

    mContext = ctx;
    BluetoothManager bt_manager = (BluetoothManager) ctx.getSystemService(Context.BLUETOOTH_SERVICE);

    mBtAdapter = bt_manager.getAdapter();

    if (mBtAdapter == null || !mBtAdapter.isEnabled()) return;

    mBtAdapter.startLeScan(new UUID[] {UUID_HRM_SERVICE}, this);
}

public void disconnect() {
}

@Override
public void onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) {
    Log.v(LOG_TAG, "Found HRM device " + device.getName());

    mBtDevice = device;
    mBtAdapter.stopLeScan(this);

    mBtDeviceAddress = mBtDevice.getAddress();

    mBtDevice.connectGatt(mContext, false,this);
}

@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
    super.onConnectionStateChange(gatt, status, newState);

    Log.v(LOG_TAG, String.format("Connection state change, new state %d", newState));
    if (mBtDeviceAddress == null || !mBtDeviceAddress.equals(gatt.getDevice().getAddress()))
        return; //we are not interested about that connection state

    if (newState == BluetoothProfile.STATE_CONNECTED) {
        Log.v(LOG_TAG, "Device connected");
        gatt.discoverServices();
        return;
    }

    if (newState == BluetoothProfile.STATE_DISCONNECTED) {
        Log.v(LOG_TAG, "Device disconnected");
        return;
    }

}

@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {

    if (gatt != null) {
        BluetoothGattCharacteristic characteristic = null;

        List<BluetoothGattService> services = gatt.getServices();

        for (BluetoothGattService s : services) {
            Log.v(LOG_TAG, String.format("Discovered %s, uuid %s", s.toString(), s.getUuid().toString()));
        }

        BluetoothGattService service = gatt.getService(UUID_HRM_SERVICE);

        if (service != null)
            characteristic = service.getCharacteristic(UUID_HRM_CHARACTERISTIC);
        gatt.readCharacteristic(characteristic);
        gatt.setCharacteristicNotification(characteristic, true);

    }

}

@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
    super.onCharacteristicRead(gatt, characteristic, status);

    if (!UUID_HRM_CHARACTERISTIC.equals(characteristic.getUuid())) {
        Log.v(LOG_TAG, "READ: Not interesting characteristic " + characteristic.getUuid().toString());
        return;
    }

    int flags = characteristic.getProperties();
    int format = (flags & 0x01) != 0 ? BluetoothGattCharacteristic.FORMAT_UINT16 : BluetoothGattCharacteristic.FORMAT_UINT8;

    int heart_rate = characteristic.getIntValue(format, 1);

    Log.v(LOG_TAG, String.format("Heart rate %d bpm", heart_rate) );
}

@Override
public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
    super.onCharacteristicChanged(gatt, characteristic);


    if (!UUID_HRM_CHARACTERISTIC.equals(characteristic.getUuid())) {
        Log.v(LOG_TAG, "CHANGED: Not interesting characteristic " + characteristic.getUuid().toString());
        return;
    }

    gatt.readCharacteristic(characteristic);
}

任何人都可以帮助我前进，尤其是Garmin的人吗？或者这是常见且已知的问题，我应该忘掉它，并尝试使用ANT +？

Garmin HRM Dual，不通过BLE传输数据

0 个答案: