Android BLE特性getValue没有任何反应？

Question

我正在尝试使用通知属性配置 READ 特征。目前，我可以在 android 具有 READ 和 NOTIFY 属性的应用程序上看到此特征。

这是我设备的 uuid 信息：

UUID info

是的，我需要先通知属性，然后再发送命令，这将是接收值，但是，事实上，我没有收到任何价值，我什至不知道出了什么问题，这是我的代码：

     public void onServicesDiscovered(BluetoothGatt gatt, int status){

          if (status == gatt.GATT_SUCCESS){ 

              runOnUiThread(new Runnable(){

                  public void run() {
                      BluetoothGattService gattService = gatt.getService(SERVICE_UUID);

                      if(gattService != null){
                        BluetoothGattCharacteristic gattCharacteristic = gattService.getCharacteristic(NOTIF_UUID);
                        if (gattCharacteristic != null ){
                           for (BluetoothGattDescriptor descriptor : gattCharacteristic.getDescriptors()){
                              descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
                              boolean sucess = gatt.writeDescriptor(descriptor);
                           }
                        gatt.setCharacteristicNotification(gattCharacteristic, true);  

                       }
                characteristic = gattService.getCharacteristic(WRITE_DATA); 
                if (characteristic != null){
                   sendCommand(characteristic, gatt); //send command
                }     
                    
now , I have already send command , and it's return success , because onCharacteristicWrite() has response,
but onCharacteristicRead() and onCharacteristicChanged() is not any response? Why ?

which part I missing?

Answer 1

  descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);

而不是

  descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);

Android BLE特性getValue没有任何反应？

Android BLE characteristics getValue is no any response?

android

bluetooth-lowenergy