BLE设备断开自动与And​​roid设备。 Android的BLE [英] BLE Device disconnect with Android device automatically. Android BLE

问题描述

我使用的是Android的Nexus 7通过蓝牙低耗能链接连接的设备。我能够连接到设备，并保持连接，如果我不这样做与设备的任何沟通。

不过，如果我通过点击一个按钮，使一个具体特性的通知，然后该设备将断开与几秒钟的数据传输后片剂。

有谁知道可能是什么问题？非常感谢你！

下面是我的code：

 公共布尔setCharacteristicNotification（启用布尔）{      如果（mBluetoothAdapter == NULL || mBluetoothGatt == NULL）{
          Log.w（TAGBluetoothAdapter未初始化）;
               返回false;
      }      BluetoothGattService服务= mBluetoothGatt.getService（UUID_MY_SERVICE）;
      如果（服务== NULL）{
          Log.e（TAG的服务没有找到！）;
          返回false;
      }      BluetoothGattCharacteristic特征= Service.getCharacteristic（UUID_MY_CHARACTERISTIC）;      最终诠释charaProp = characteristic.getProperties（）;      如果（（charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY）大于0）{
          mBluetoothGatt.setCharacteristicNotification（特点，启用）;            BluetoothGattDescriptor描述符= characteristic.getDescriptor（
                    UUID.fromString（SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG））;
            descriptor.setValue（BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE）;            mBluetoothGatt.writeDescriptor（描述）;          返回true;
      }    返回false;}
 

解决方案

（在回答一个问题的编辑，转换为一个社区维基答案。参见<一个href=\"http://meta.stackoverflow.com/questions/267434/what-is-the-appropriate-action-when-the-answer-to-a-question-is-added-to-the-que\">What是当一个问题的答案将被添加到问题本身进行相应的操作？）

在OP写道：

  

今天我解决了这个问题。

  
  

只要改变 descriptor.setValue（BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE）;

  
  

到 descriptor.setValue（BluetoothGattDescriptor.ENABLE_INDICATION_VALUE）;

  
  

后续行动：

  
  我做了一些研究和试验

之后，我发现，自动断线问题有事情做对的Nexus 7蓝牙和WIFI之间的干扰。如果我关掉了WIFI，蓝牙随后的断线问题已经一去不复返了。并没有对银河3,4,5出现此问题。

I'm using Android Nexus 7 to connect a device via Bluetooth Low Energy link. I'm able to connect the device, and stay connected if I don't do any communication with the device.

However, if I enable the notification of one specific characteristic by clicking a button, then the device would disconnect with the tablet after a few seconds' data transmission.

Does anyone know what might be the problem? Thank you very much!

Here's my code:

    public boolean setCharacteristicNotification(boolean enabled){

      if (mBluetoothAdapter == null || mBluetoothGatt == null) {
          Log.w(TAG, "BluetoothAdapter not initialized");
               return false;      
      }

      BluetoothGattService Service = mBluetoothGatt.getService(UUID_MY_SERVICE);
      if (Service == null) {
          Log.e(TAG, "service not found!");
          return false;
      }

      BluetoothGattCharacteristic characteristic = Service.getCharacteristic(UUID_MY_CHARACTERISTIC);

      final int charaProp = characteristic.getProperties();

      if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
          mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);

            BluetoothGattDescriptor descriptor = characteristic.getDescriptor(
                    UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG));
            descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); 

            mBluetoothGatt.writeDescriptor(descriptor);

          return true;
      }

    return false;

}

解决方案

(Answered in a question edit. Converted to a community wiki answer. See What is the appropriate action when the answer to a question is added to the question itself? )

The OP wrote:

I solved this problem today.

Just change descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);

to descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);

Follow Up:

After I did some research and testing, I found that the automatically disconnection problem has something to do with the interference between Bluetooth and WIFI on Nexus 7. If I turned off the WIFI, then the disconnection problem of Bluetooth has gone. And this problem did not occur on Galaxy 3,4,5.

这篇关于BLE设备断开自动与And​​roid设备。 Android的BLE的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！