Question

我正在尝试在Sony SmartWatch 3上实现BluetoothGattServer。

我可以成功打开一个Gatt服务器并做广告。

使用BLE Scanner application，在发现自定义服务及其自定义特征时，结果不一致。

在三星Galaxy Note 8 - Android 4.4上 - 我可以正确检测自定义服务和自定义特征;
在Nexus 7 - Android 5.0.1上 - 我可以检测到我的自定义服务但只有奇怪的UUID特征： 00000000-0000-1000-8000-00805f9b34fb
在三星Galaxy Note 8上 - CynaogenMod棉花糖 - 与Nexus 7相同。

以下是我在Wear设备上运行的代码：

public final class BluetoothServer extends BluetoothGattServerCallback{
    private final static String TAG = BluetoothServer.class.getSimpleName();
    private final static String BASE_UUID = "0000%s-0000-1000-8000-00805f9b34fb";


    public final static UUID MAIN_SERVICE = UUID.fromString(String.format(BASE_UUID, "FEE0"));
    public final static UUID CHARAC_REQUEST = UUID.fromString(String.format(BASE_UUID, "FEE01"));
    public final static UUID CHARAC_RECORDING = UUID.fromString(String.format(BASE_UUID, "FEE02"));


    private final BluetoothGattServer gattServer;

    private final BluetoothGattService mainServer;
    private final BluetoothGattCharacteristic requestCharacteristic;
    private final BluetoothGattCharacteristic recordingCharacteristic;

    public BluetoothServer(@NonNull final Context context) {
        final BluetoothManager btManager = (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);
        final BluetoothAdapter btAdapter = btManager.getAdapter();

        this.gattServer = btManager.openGattServer(context.getApplicationContext(), this);

        this.mainService= new BluetoothGattService(MAIN_SERVICE, BluetoothGattService.SERVICE_TYPE_PRIMARY);


    this.requestCharacteristic = new BluetoothGattCharacteristic(CHARAC_REQUEST, BluetoothGattCharacteristic.PROPERTY_READ, BluetoothGattCharacteristic.PERMISSION_READ);
    this.recordingCharacteristic = new BluetoothGattCharacteristic(CHARAC_RECORDING, BluetoothGattCharacteristic.PROPERTY_READ, BluetoothGattCharacteristic.PERMISSION_READ);

        this.mainService.addCharacteristic(this.requestCharacteristic);
        this.mainService.addCharacteristic(this.recordingCharacteristic);

        this.gattServer.addService(this.mainService);

        final BluetoothLeAdvertiser advertiser = btAdapter.getBluetoothLeAdvertiser();
        btAdapter.setName("Test Wear");
        final AdvertiseSettings settings = new AdvertiseSettings.Builder()
                .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY)
                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
                .setConnectable(false)
                .build();

        final ParcelUuid pUuid = new ParcelUuid(MAIN_SERVICE);
        final AdvertiseData data = new AdvertiseData.Builder()
                .setIncludeDeviceName(true)
                .addServiceUuid(pUuid)
                .build();

        final AdvertiseCallback advertisingCallback = new AdvertiseCallback() {
            @Override
            public final void onStartSuccess(final AdvertiseSettings settingsInEffect) {
                super.onStartSuccess(settingsInEffect);
                Log.i(TAG, "Started advertisement with success");
            }

            @Override
            public final void onStartFailure(final int errorCode) {
                Log.e(TAG, "Advertising onStartFailure: " + errorCode );
                super.onStartFailure(errorCode);
            }
        };

        advertiser.startAdvertising(settings, data, advertisingCallback );
    }

    //[... the rest of the callbacks implementation ...]
}

我还尝试使用来自https://www.uuidgenerator.net/的自定义生成的UUID，但这样做更糟糕：要么我不能通过名称进行广告宣传，要么我不包括该名称，那么BLE Scanner应用程序赢得了＃39;在所有设备上启动我的自定义服务。

我做错了什么？

Answer 1

您是否检查过onStartFailure（）方法？

还有一件事，尽量不要在AdvertiseData中添加UUID，在这里添加代码..！

return (num >= (1 << shl)) * shl;

Android BLE外设模式：未检测到自定义特征

1 个答案: