针对葡萄糖的Android BLE通知

时间:2014-07-28 07:06:35

标签: android notifications bluetooth-lowenergy android-notifications

我厌倦了使用Android BLE SDK与我的Glucose设备进行通信。 我需要UUID 2a18和2a34的setCharacteristicNotification。我参考Android官方SDK如下:

http://developer.android.com/guide/topics/connectivity/bluetooth-le.html#notification

BluetoothGattCharacteristic charGM = 
mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
    .getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_STRING));
mConnGatt.setCharacteristicNotification(charGM, enabled);
BluetoothGattDescriptor descGM = charGM.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descGM.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descGM);

但它甚至无法进入onCharacteristicChanged回调。

我的onCharacteristicChanged如下:

        public void onCharacteristicChanged(BluetoothGatt gatt,
                                        BluetoothGattCharacteristic characteristic) {
        broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(),"onCharacteristicChanged",Toast.LENGTH_LONG).show();
                setProgressBarIndeterminateVisibility(false);
            };
        });
    }

如果按如下方式设置电池电量通知,则可以正常工作。

BluetoothGattCharacteristic charBarrery = 
    mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_BATTERY))
        .getCharacteristic(UUID.fromString(BleUuid.CHAR_BATTERY_LEVEL_STRING));
mConnGatt.setCharacteristicNotification(charBarrery, enabled);
BluetoothGattDescriptor descBarrery = charBarrery.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
descBarrery.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
mConnGatt.writeDescriptor(descBarrery);

我不知道电池和葡萄糖通知有什么不同。

如果有人知道我该怎么做,请帮助我。

其他

当我使用电池服务时,我的logcat如下:

07-29 10:28:17.924: D/BluetoothGatt(947): setCharacteristicNotification() - uuid: 00002a19-0000-1000-8000-00805f9b34fb enable: true
07-29 10:28:17.924: D/BluetoothGatt(947): writeDescriptor() - uuid: 00002902-0000-1000-8000-00805f9b34fb
07-29 10:28:18.484: D/BluetoothGatt(947): onDescriptorWrite() - Device=B4:AB:2C:06:9E:F4 UUID=00002a19-0000-1000-8000-00805f9b34fb
07-29 10:28:18.604: D/BluetoothGatt(947): onNotify() - Device=B4:AB:2C:06:9E:F4 UUID=00002a19-0000-1000-8000-00805f9b34fb

但是当我使用Glucose时,我的logcat会丢失onNotify(),如下所示:

07-29 10:31:23.729: D/BluetoothGatt(1763): setCharacteristicNotification() - uuid: 00002a18-0000-1000-8000-00805f9b34fb enable: true
07-29 10:31:23.729: D/BluetoothGatt(1763): writeDescriptor() - uuid: 00002902-0000-1000-8000-00805f9b34fb
07-29 10:31:24.324: D/BluetoothGatt(1763): onDescriptorWrite() - Device=B4:AB:2C:06:9E:F4 UUID=00002a18-0000-1000-8000-00805f9b34fb

我不知道为什么logcat会丢失onNotify()......

其他(8/4):

感谢您的回复! 我试图启用记录访问控制点特征的指示,但失败了.. 我的流程如下:

  1. 启用葡萄糖测量特征和葡萄糖测量环境特征的通知 &安培; 启用记录访问控制点特征

    的指示
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
        for (BluetoothGattService service : gatt.getServices()) {
            if ((service == null) || (service.getUuid() == null)) {
                continue;
            }
            if (BleUuid.SERVICE_GLUCOSE.equalsIgnoreCase(service
                    .getUuid().toString())) {
    
                BluetoothGattCharacteristic charGM = 
                        mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
                            .getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_STRING));
                mConnGatt.setCharacteristicNotification(charGM, enabled);
                BluetoothGattDescriptor descGM = charGM.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
                descGM.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
                mConnGatt.writeDescriptor(descGM);
    
                BluetoothGattCharacteristic charGMC = 
                    mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
                        .getCharacteristic(UUID.fromString(BleUuid.CHAR_GLUCOSE_MEASUREMENT_CONTEXT_STRING));
                mConnGatt.setCharacteristicNotification(charGMC, enabled);
                BluetoothGattDescriptor descGMC = charGMC.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
                descGMC.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
                mConnGatt.writeDescriptor(descGMC);
    
                BluetoothGattCharacteristic charRACP = 
                    mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
                        .getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
                mConnGatt.setCharacteristicNotification(charRACP, enabled);
                BluetoothGattDescriptor descRACP = charRACP.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
                descRACP.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
                mConnGatt.writeDescriptor(descRACP);
    
                BluetoothGattCharacteristic charBarrery = 
                        mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_BATTERY))
                            .getCharacteristic(UUID.fromString(BleUuid.CHAR_BATTERY_LEVEL_STRING));
                mConnGatt.setCharacteristicNotification(charBarrery, enabled);
                BluetoothGattDescriptor descBarrery = charBarrery.getDescriptor(UUID.fromString(BleUuid.CHAR_CLIENT_CHARACTERISTIC_CONFIG_STRING));
                descBarrery.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
                mConnGatt.writeDescriptor(descBarrery);
    
                runOnUiThread(new Runnable() {
                    public void run() {
                        btnUpdateData.setEnabled(true);
                    };
                });
            }
        }
    };
    
  2. 发送0x0101以记录访问控制点

        case R.id.btnUpdateData:
        try{
            //***SEND 0x0101 TO RECORD ACCESS CONTROL POINT   
            BluetoothGattCharacteristic writeRACPchar = 
                    mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
                        .getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
            byte[] data = new byte[1];
            data[0] = (byte)0x0101;
            writeRACPchar.setValue(data);
            mConnGatt.writeCharacteristic(writeRACPchar);
        }catch(Exception e){
            e.printStackTrace();
        }
        break;
    
  3. 我的回调函数

    @Override
    public void onCharacteristicRead(BluetoothGatt gatt,
                                     BluetoothGattCharacteristic characteristic, 
                                     int status) {
            broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
    }
    
    @Override
    public void onCharacteristicWrite(BluetoothGatt gatt,
            BluetoothGattCharacteristic characteristic, int status) {
    };
    
    @Override
    public void onCharacteristicChanged(BluetoothGatt gatt,
                                        BluetoothGattCharacteristic characteristic) {
        broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);
    }
    
  4. &安培;

        private void broadcastUpdate(final String action,
            final BluetoothGattCharacteristic characteristic) {
            final Intent intent = new Intent(action);
            if (BleUuid.CHAR_SERIAL_NUMBEAR_STRING
                    .equalsIgnoreCase(characteristic.getUuid().toString())) {
                displayResult(characteristic.getStringValue(0));
            }else if(BleUuid.CHAR_MANUFACTURER_NAME_STRING
                    .equalsIgnoreCase(characteristic.getUuid().toString())){
                displayResult(characteristic.getStringValue(0));
            } else if(BleUuid.CHAR_BATTERY_LEVEL_STRING
                    .equalsIgnoreCase(characteristic.getUuid().toString())){
                final byte[] data = characteristic.getValue();
                String dataStr = "";
                dataStr = String.format("%02X", data[0]);
                int a = Integer.parseInt(dataStr, 16);
                String result = "battery level: " + Integer.toString(a)+ "%";
                displayResult(result);
            } else {
                // For all other profiles, writes the data formatted in HEX.
                final byte[] data = characteristic.getValue();
                if (data != null && data.length > 0) {
                    final StringBuilder stringBuilder = new StringBuilder(data.length);
                    for(byte byteChar : data)
                        stringBuilder.append(String.format("%02X ", byteChar));
                    displayResult(stringBuilder.toString());
                }
            }
    }
    

    &安培;

        private void displayResult(String result){
        adUpdateData.add(result);
        runOnUiThread(new Runnable() {
            public void run() {
                lvUpdateData.setAdapter(adUpdateData);
            };
        });
    }
    

    我试图理解“GLS_SPEC”pdf ... 我使用了Nordic Semiconductor的Glucose Service样本应用程序,它可以运行。 我试着学习如何实现这个功能。

    我注意到一些日志就像“unregisterIRListener()被称为”在LogCat上显示,但我不确定是否是我的问题......

    感谢阅读。

1 个答案:

答案 0 :(得分:4)

葡萄糖和电池服务存在逻辑差异。当您通常启用电池电量通知时(取决于实施),设备会立即向您发送电池电量。这就是你在那里获得通知的原因。当然,在某些实现中,它仅在值更改时或通过其他规则通知您,但在您的情况下,它看起来像是这样。

葡萄糖服务的工作原理不同。在葡萄糖服务(https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.glucose.xml)中,您有3个强制性特征。我们在这里跳过葡萄糖特征。 其中之一是葡萄糖测量,您可以获得葡萄糖读数通知。您启用这些通知的实现是正确的,它将起作用。但是为了获得通知,您必须使用记录访问控制点特性来请求它们。它允许您获取所有葡萄糖读数,只有最新的,只有第一个,从设备中删除已保存的读数等。例如,当您:

  1. 启用葡萄糖测量特征通知(与您一样)
  2. 启用记录访问控制点特征的指示
  3. 发送f.e. 0x0101 =报告存储的记录|所有记录
  4. 你应该在Glucose Measurement char上收到N个通知。然后是RACP char的指示。值:0x06000101 =“报告存储记录”的响应|成功。 如果葡萄糖装置上没有保存读数,则N可以是0。如果您正在使用Nordic Semiconductor的葡萄糖服务样品应用程序,您可以尝试按下按钮0(?)在电路板上生成新结果(最多20个)并再次请求。

    阅读GLS文档:https://www.bluetooth.org/en-us/specification/adopted-specifications - > GLS - > PDF有关葡萄糖服务和记录访问控制点格式的更多信息。

    修改

    您正在编写记录访问控制点值错误。这是工作代码:

    case R.id.btnUpdateData:
        try{
            //***SEND 0x0101 TO RECORD ACCESS CONTROL POINT   
            BluetoothGattCharacteristic writeRACPchar = 
                    mConnGatt.getService(UUID.fromString(BleUuid.SERVICE_GLUCOSE))
                        .getCharacteristic(UUID.fromString(BleUuid.CHAR_RECORD_ACCESS_CONTROL_POINT_STRING));
            byte[] data = new byte[2];
            data[0] = 0x01; // Report Stored records
            data[1] = 0x01; // All records
            writeRACPchar.setValue(data);
    
            // or:
            // byte[] data = new byte[2];
            // writeRACPchar.setValue(data);
            // writeRACPchar.setIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 1, 0); // Report Stored records
            // writeRACPchar.setIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 1, 1); // Read all (offset 1)
            mConnGatt.writeCharacteristic(writeRACPchar);
        }catch(Exception e){
            e.printStackTrace();
        }
        break;
    

    你必须写2个字节,每个字节是8个,但可以写成2位HEX,f.e。 0xAB r 0x01。值0x0101有2个字节,您可能不是