1.摘要

Android手机间通过蓝牙方式进行通信，有两种常见的方式，一种是socket方式，另一种是通过GATT Server（Android 5.0以后）通信。
（1）socket方式最为简单，但是很多低功耗的蓝牙设备，如单片机上的蓝牙模块可能不支持
（2）GATT方式相对比较复杂
（3）socket、GATT均为C/S（client-server)模式
本文基于两种通信方式，进行详细展开，并推荐了开源项目，建议配合学习。

关键词

（1）Bluetooth

蓝牙（Bluetooth）：蓝牙，是一种支持设备短距离通信（一般10m内）的无线电技术，能在包括移动电话、PDA、无线耳机、笔记本电脑、相关外设等众多设备之间进行无线信息交换。利用“蓝牙”技术，能够有效地简化移动通信终端设备之间的通信，也能够成功地简化设备与因特网Internet之间的通信，从而使数据传输变得更加迅速高效，为无线通信拓宽道路。

（2） UUID

UUID（Universally Unique Identifier）：用于标识蓝牙服务以及通讯特征访问属性，不同的蓝牙服务和属性使用不同的访问方法。

（3）服务UUID

服务UUID（Service UUID）：不同的服务（Service）应该有不同的编号(UUID)，用以区分不同的服务(Service)。

（4）特征值UUID

特征值UUID（Characteristic　UUID）：特性（Characteristic） 是依附于某个服务（Service）的

（5）属性（Property）

（5.1）Read： 读属性

Read： 读属性，具有这个属性的特性是可读的，也就是说这个属性允许手机来读取一些信息。手机可以发送指令来读取某个具有读属性UUID的信息。

（5.2）Notify： 通知属性

Notify： 通知属性， 具有这个属性的特性是可以发送通知的，也就是说具有这个属性的特性（Characteristic）可以主动发送信息给手机。

（5.3）Write： 写属性

Write： 写属性， 具有这个属性的特性是可以接收写入数据的。通常手机发送数据给蓝模块就是通过这个属性完成的。这个属性在Write 完成后，会发送写入完成结果的反馈给手机，然后手机再可以写入下一包或处理后续业务，这个属性在写入一包数据后，需要等待应用层返回写入结果，速度比较慢。

（5.4）WriteWithout Response：写属性

WriteWithout Response：写属性，从字面意思上看，只是写，不需要返回写的结果，这个属性的特点是不需要应用层返回，完全依靠协议层完成，速度快，但是写入速度超过协议处理速度的时候，会丢包。

（6） GATT

GATT（Generic Attribute Profile）：中文名叫通用属性协议，它定义了services和characteristic两种东西来完成低功耗蓝牙设备之间的数据传输。它是建立在通用数据协议Attribute Protocol (ATT),之上的，ATT把services和characteristic以及相关的数据保存在一张简单的查找表中，该表使用16-bit的id作为索引。

（7）profile

profile可以理解为一种规范，一个标准的通信协议，它存在于从机中。蓝牙组织规定了一些标准的profile，例如 HID OVER GATT ，防丢器 ，心率计等。每个profile中会包含多个service，每个service代表从机的一种能力。

2. Bluetooth Socket


 以该项目demo为例介绍
蓝牙端口监听接口和TCP端口类似：Socket和ServerSocket类。在服务器端，使用BluetoothServerSocket类来创建一个 监听服务端口。当一个连接被BluetoothServerSocket所接受，它会返回一个新的BluetoothSocket来管理该连接。在客户 端，使用一个单独的BluetoothSocket类去初始化一个外接连接和管理该连接。

最通常使用的蓝牙端口是RFCOMM，它是被Android API支持的类型。RFCOMM是一个面向连接，通过蓝牙模块进行的数据流传输方式，它也被称为串行端口规范（Serial Port Profile，SPP）。

为了创建一个BluetoothSocket去连接到一个已知设备，使用方法 BluetoothDevice.createRfcommSocketToServiceRecord()。然后调用connect()方法去尝试一个 面向远程设备的连接。这个调用将被阻塞指导一个连接已经建立或者该链接失效。

为了创建一个BluetoothSocket作为服务端（或者“主机”），查看BluetoothServerSocket文档。

每当该端口连接成功，无论它初始化为客户端，或者被接受作为服务器端，通过getInputStream()和getOutputStream()来打开IO流，从而获得各自的InputStream和OutputStream对象

BluetoothSocket类线程安全。特别的，close()方法总会马上放弃外界操作并关闭服务器端口。

注意

1.需要BLUETOOTH权限。
2.此处BluetoothSocket使用uuid:00001101-0000-1000-8000-00805F9B34FB

2.1 Server

private static final String UUIDString = "00001101-0000-1000-8000-00805F9B34FB";
//开启服务器
private class ServerThread extends Thread {
    @Override
    public void run() {
        try {
                /* 创建一个蓝牙服务器
                 * 参数分别：服务器名称、UUID   */
            mServerSocket = bluetoothAdapter.listenUsingRfcommWithServiceRecord(PROTOCOL_SCHEME_RFCOMM, UUID.fromString(UUIDString));
            while (true){
                Log.d("server", "wait cilent connect...");
                Message msg = new Message();
                msg.obj = "请稍候，正在等待客户端的连接...";
                msg.what = WAITING_FOR_CLIENT;
                linkDetectedHandler.sendMessage(msg);
                /* 接受客户端的连接请求 */
                BluetoothSocket socket = mServerSocket.accept();
                socketMap.put(socket.getRemoteDevice().getAddress(), socket);
//                  remoteDeviceMap.put(socket.getRemoteDevice().getAddress(),socket.getRemoteDevice());
                Log.d("server", "accept success !");
                Message msg2 = new Message();
                String info = "客户端已经连接上！可以发送信息。";
                msg2.obj = info;
                msg.what = CONNECTED_CLIENT;
                linkDetectedHandler.sendMessage(msg2);
                //启动接受数据
                ReadThread mreadThread = new ReadThread(socket.getRemoteDevice().getAddress());
                readThreadMap.put(socket.getRemoteDevice().getAddress(),mreadThread);
                mreadThread.start();
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.2 Client

//开启客户端
private class ClientThread extends Thread {
    private String remoteAddress;
    public ClientThread(String remoteAddress) {
        this.remoteAddress = remoteAddress;
    }
    @Override
    public void run() {
        try {
            //创建一个Socket连接：只需要服务器在注册时的UUID号
            BluetoothDevice device = bluetoothAdapter.getRemoteDevice(remoteAddress);
            BluetoothSocket socket = device.createRfcommSocketToServiceRecord(UUID.fromString(UUIDString));
            //连接
            Message msg2 = new Message();
            msg2.obj = "请稍候，正在连接服务器:" + remoteAddress;
            msg2.what = IS_CONNECTING_SERVER;
            linkDetectedHandler.sendMessage(msg2);
            socket.connect();
            socketMap.put(remoteAddress, socket);
            Message msg = new Message();
            msg.obj = remoteAddress;
            msg.what = CONNECTED_SERVER;
            linkDetectedHandler.sendMessage(msg);
            //启动接受数据
            ReadThread mreadThread = new ReadThread(remoteAddress);
            readThreadMap.put(remoteAddress,mreadThread);
            mreadThread.start();
        } catch (IOException e) {
            e.printStackTrace();
            socketMap.remove(remoteAddress);
            Log.e("connect", e.getMessage(), e);
            Message msg = new Message();
            msg.obj = "连接服务端异常！断开连接重新试一试。"+e.getMessage();
            msg.what = CONNECT_SERVER_ERROR;
            linkDetectedHandler.sendMessage(msg);
        }
    }
}

3. Bluetooth GATT


 以该项目demo为例介绍

注意

1.GATT提供了notifyCharacteristicChanged方法去响应客户端的请求值，响应值（characteristic.value）

2.uuid经过本人测试仅支持以下情况，网文中提及手机端可能不支持自定义uuid。
 val BLE_SERVICE_UUID = UUID.fromString("00001802-0000-1000-8000-00805f9b34fb")
 val BLE_WRITE_UUID = UUID.fromString("00002a02-0000-1000-8000-00805f9b34fb")
 val BLE_READ_UUID  = UUID.fromString("00002a03-0000-1000-8000-00805f9b34fb")
 val BLE_DESC_UUID  = UUID.fromString("00002a04-0000-1000-8000-00805f9b34fb")

Android 蓝牙通讯 手机蓝牙通讯_客户端

Android 蓝牙通讯 手机蓝牙通讯_服务器_02

Android 蓝牙通讯 手机蓝牙通讯_客户端_03

3.1 Server

private fun setupServer() {
    val gattService = BluetoothGattService(Constants.BLE_SERVICE_UUID, BluetoothGattService.SERVICE_TYPE_PRIMARY)
    val characteristicRead = BluetoothGattCharacteristic(Constants.BLE_READ_UUID, BluetoothGattCharacteristic.PROPERTY_READ, BluetoothGattCharacteristic.PERMISSION_READ)
    val descriptor = BluetoothGattDescriptor(Constants.BLE_DESC_UUID, BluetoothGattCharacteristic.PERMISSION_WRITE)
    characteristicRead.addDescriptor(descriptor)
    gattService.addCharacteristic(characteristicRead)
    val characteristicWrite = BluetoothGattCharacteristic(Constants.BLE_WRITE_UUID, BluetoothGattCharacteristic.PROPERTY_WRITE or
            BluetoothGattCharacteristic.PROPERTY_READ or BluetoothGattCharacteristic.PROPERTY_NOTIFY,
            BluetoothGattCharacteristic.PERMISSION_WRITE)
    gattService.addCharacteristic(characteristicWrite)
    Log.d("wenpd", "startGattServer:stagattServicetus=$gattService")
    mGattServer.addService(gattService)
}

3.2 Client

private class GattClientCallback extends BluetoothGattCallback {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        super.onConnectionStateChange(gatt, status, newState);
        if (status == BluetoothGatt.GATT_FAILURE) {
            disconnectGattServer();
            return;
        } else if (status != BluetoothGatt.GATT_SUCCESS) {
            disconnectGattServer();
            return;
        }
        if (newState == BluetoothProfile.STATE_CONNECTED) {
            mConnected = true;
            gatt.discoverServices();
        } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
            disconnectGattServer();
        }
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {
        super.onServicesDiscovered(gatt, status);
        Log.d(TAG, "onServicesDiscovered status:" + status);
        if (status != BluetoothGatt.GATT_SUCCESS) {
            return;
        }
        BluetoothGattService service = gatt.getService(Constants.SERVICE_UUID);
        BluetoothGattCharacteristic characteristic = service.getCharacteristic(Constants.CHARACTERISTIC_UUID);
        characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT);
        mInitialized = gatt.setCharacteristicNotification(characteristic, true);
    }

    @Override
    public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
        super.onCharacteristicChanged(gatt, characteristic);
        byte[] messageBytes = characteristic.getValue();
        /*for(int i = 0, j = messageBytes.length -1; i < j; ++i, --j) {
            byte temp = messageBytes[i];
            messageBytes[i] = messageBytes[j];
            messageBytes[j] = temp;
        }*/
        String messageString = new String(messageBytes, StandardCharsets.UTF_8);
        Log.d(TAG,"Received message: " + messageString);
        setReceivedData(messageString);
    }
}


附录

常用uuid

00001000-0000-1000-8000-00805F9B34FB Service Discovery Server Service
00001001-0000-1000-8000-00805F9B34FB Browse Group Descriptor Service
00001002-0000-1000-8000-00805F9B34FB Public Browse Group Service
#蓝牙串口服务
00001101-0000-1000-8000-00805F9B34FB Serial Port Service
#使用PPP服务类的局域网访问
00001102-0000-1000-8000-00805F9B34FB LAN Access Using PPP Service
#拨号网络服务
00001103-0000-1000-8000-00805F9B34FB Dialup Networking Service
#信息同步服务
00001104-0000-1000-8000-00805F9B34FB IrMC Sync Service
00001105-0000-1000-8000-00805F9B34FB SDP_OBEX Object Push Service
#文件传输服务
00001106-0000-1000-8000-00805F9B34FB OBEX File Transfer Service
00001107-0000-1000-8000-00805F9B34FB IrMC Sync Command Service
00001108-0000-1000-8000-00805F9B34FB SDP_Headset Service
00001109-0000-1000-8000-00805F9B34FB Cordless Telephony Service
0000110A-0000-1000-8000-00805F9B34FB SDP_Audio Source Service
0000110B-0000-1000-8000-00805F9B34FB SDP_Audio Sink Service
0000110C-0000-1000-8000-00805F9B34FB SDP_AV Remote Control Target Service
0000110D-0000-1000-8000-00805F9B34FB SDP_Advanced Audio Distribution Service
0000110E-0000-1000-8000-00805F9B34FB SDP_AV Remote Control Service
0000110F-0000-1000-8000-00805F9B34FB Video Conferencing Service
00001110-0000-1000-8000-00805F9B34FB Intercom Service
#蓝牙传真服务
00001111-0000-1000-8000-00805F9B34FB Fax Service
00001112-0000-1000-8000-00805F9B34FB Headset Audio Gateway Service
00001113-0000-1000-8000-00805F9B34FB WAP Service
00001114-0000-1000-8000-00805F9B34FB WAP Client Service
#个人局域网服务
00001115-0000-1000-8000-00805F9B34FB PANU Service
#个人局域网服务
00001116-0000-1000-8000-00805F9B34FB NAP Service
#个人局域网服务
00001117-0000-1000-8000-00805F9B34FB GN Service
00001118-0000-1000-8000-00805F9B34FB Direct Printing Service
00001119-0000-1000-8000-00805F9B34FB Reference Printing Service
0000111A-0000-1000-8000-00805F9B34FB Imaging Service
0000111B-0000-1000-8000-00805F9B34FB Imaging ResponderService
0000111C-0000-1000-8000-00805F9B34FB Imaging Automatic Archive Service
0000111D-0000-1000-8000-00805F9B34FB ImagingReferenceObjectsService
0000111E-0000-1000-8000-00805F9B34FB SDP_Hands free Service
0000111F-0000-1000-8000-00805F9B34FB Hands free Audio Gateway Service
00001120-0000-1000-8000-00805F9B34FB Direct Printing Reference Objects Service
00001121-0000-1000-8000-00805F9B34FB Reflected UI Service
00001122-0000-1000-8000-00805F9B34FB Basic Pringing Service
00001123-0000-1000-8000-00805F9B34FB Printing Status Service
#人机输入服务
00001124-0000-1000-8000-00805F9B34FB HumanInterface Device Service
00001125-0000-1000-8000-00805F9B34FB Hardcopy Cable Replacement Service
#蓝牙打印服务
00001126-0000-1000-8000-00805F9B34FB HCR Print Service
00001127-0000-1000-8000-00805F9B34FB HCR Scan Service
00001128-0000-1000-8000-00805F9B34FB CommonI SDN Access Service
00001129-0000-1000-8000-00805F9B34FB Video Conferencing GW Service
0000112A-0000-1000-8000-00805F9B34FB UDIMT Service
0000112B-0000-1000-8000-00805F9B34FB UDITA Service
0000112C-0000-1000-8000-00805F9B34FB Audio Video Service
0000112D-0000-1000-8000-00805F9B34FB SIM Access Service
00001200-0000-1000-8000-00805F9B34FB PnP Information Service
00001201-0000-1000-8000-00805F9B34FB Generic Networking Service
00001202-0000-1000-8000-00805F9B34FB Generic File Transfer Service
00001203-0000-1000-8000-00805F9B34FB Generic Audio Service
00001204-0000-1000-8000-00805F9B34FB Generic Telephony Service

==============================================================================================
Sample Services
0000180d-0000-1000-8000-00805f9b34fb    Heart Rate Service    
0000180a-0000-1000-8000-00805f9b34fb    Device Information Service    
Sample Characteristics. 
00002a37-0000-1000-8000-00805f9b34fb    Heart Rate Measurement    
00002a29-0000-1000-8000-00805f9b34fb    Manufacturer Name String    
    
GATT Services 
00001800-0000-1000-8000-00805f9b34fb    GenericAccess    
00001801-0000-1000-8000-00805f9b34fb    GenericAttribute    
 
GATT Declarations 
00002800-0000-1000-8000-00805f9b34fb    Primary Service    
00002801-0000-1000-8000-00805f9b34fb    Secondary Service    
00002802-0000-1000-8000-00805f9b34fb    Include    
00002803-0000-1000-8000-00805f9b34fb    Characteristic    
         
GATT Descriptors 
00002900-0000-1000-8000-00805f9b34fb    Characteristic Extended Properties    
00002901-0000-1000-8000-00805f9b34fb    Characteristic User Description    
00002902-0000-1000-8000-00805f9b34fb    Client Characteristic Configuration    
00002903-0000-1000-8000-00805f9b34fb    Server Characteristic Configuration    
00002904-0000-1000-8000-00805f9b34fb    Characteristic Presentation Format    
00002905-0000-1000-8000-00805f9b34fb    Characteristic Aggregate Format    
00002906-0000-1000-8000-00805f9b34fb    Valid Range    
00002907-0000-1000-8000-00805f9b34fb    External Report Reference Descriptor    
00002908-0000-1000-8000-00805f9b34fb    Report Reference Descriptor    
 
GATT Characteristics 
00002a00-0000-1000-8000-00805f9b34fb    Device Name    
00002a01-0000-1000-8000-00805f9b34fb    Appearance    
00002a02-0000-1000-8000-00805f9b34fb    Peripheral Privacy Flag    
00002a03-0000-1000-8000-00805f9b34fb    Reconnection Address    
00002a04-0000-1000-8000-00805f9b34fb    PPCP    
00002a05-0000-1000-8000-00805f9b34fb    Service Changed    
         
GATT Service UUIDs 
00001802-0000-1000-8000-00805f9b34fb    Immediate Alert    
00001803-0000-1000-8000-00805f9b34fb    Link Loss    
00001804-0000-1000-8000-00805f9b34fb    Tx Power    
00001805-0000-1000-8000-00805f9b34fb    Current Time Service    
00001806-0000-1000-8000-00805f9b34fb    Reference Time Update Service    
00001807-0000-1000-8000-00805f9b34fb    Next DST Change Service    
00001808-0000-1000-8000-00805f9b34fb    Glucose    
00001809-0000-1000-8000-00805f9b34fb    Health Thermometer    
0000180a-0000-1000-8000-00805f9b34fb    Device Information    
0000180b-0000-1000-8000-00805f9b34fb    Network Availability    
0000180d-0000-1000-8000-00805f9b34fb    Heart Rate    
0000180e-0000-1000-8000-00805f9b34fb    Phone Alert Status Service    
0000180f-0000-1000-8000-00805f9b34fb    Battery Service    
00001810-0000-1000-8000-00805f9b34fb    Blood Pressure    
00001811-0000-1000-8000-00805f9b34fb    Alert Notification Service    
00001812-0000-1000-8000-00805f9b34fb    Human Interface Device    
00001813-0000-1000-8000-00805f9b34fb    Scan Parameters    
00001814-0000-1000-8000-00805f9b34fb    Running Speed and Cadence    
00001816-0000-1000-8000-00805f9b34fb    Cycling Speed and Cadence    
00001818-0000-1000-8000-00805f9b34fb    Cycling Power    
00001819-0000-1000-8000-00805f9b34fb    Location and Navigation    
     
GATT Characteristic UUIDs 
00002a06-0000-1000-8000-00805f9b34fb    Alert Level    
00002a07-0000-1000-8000-00805f9b34fb    Tx Power Level    
00002a08-0000-1000-8000-00805f9b34fb    Date Time    
00002a09-0000-1000-8000-00805f9b34fb    Day of Week    
00002a0a-0000-1000-8000-00805f9b34fb    Day Date Time    
00002a0c-0000-1000-8000-00805f9b34fb    Exact Time 256    
00002a0d-0000-1000-8000-00805f9b34fb    DST Offset    
00002a0e-0000-1000-8000-00805f9b34fb    Time Zone    
00002a0f-0000-1000-8000-00805f9b34fb    Local Time Information    
00002a11-0000-1000-8000-00805f9b34fb    Time with DST    
00002a12-0000-1000-8000-00805f9b34fb    Time Accuracy    
00002a13-0000-1000-8000-00805f9b34fb    Time Source    
00002a14-0000-1000-8000-00805f9b34fb    Reference Time Information    
00002a16-0000-1000-8000-00805f9b34fb    Time Update Control Point    
00002a17-0000-1000-8000-00805f9b34fb    Time Update State    
00002a18-0000-1000-8000-00805f9b34fb    Glucose Measurement    
00002a19-0000-1000-8000-00805f9b34fb    Battery Level    
00002a1c-0000-1000-8000-00805f9b34fb    Temperature Measurement    
00002a1d-0000-1000-8000-00805f9b34fb    Temperature Type    
00002a1e-0000-1000-8000-00805f9b34fb    Intermediate Temperature    
00002a21-0000-1000-8000-00805f9b34fb    Measurement Interval    
00002a22-0000-1000-8000-00805f9b34fb    Boot Keyboard Input Report    
00002a23-0000-1000-8000-00805f9b34fb    System ID    
00002a24-0000-1000-8000-00805f9b34fb    Model Number String    
00002a25-0000-1000-8000-00805f9b34fb    Serial Number String    
00002a26-0000-1000-8000-00805f9b34fb    Firmware Revision String    
00002a27-0000-1000-8000-00805f9b34fb    Hardware Revision String    
00002a28-0000-1000-8000-00805f9b34fb    Software Revision String    
00002a29-0000-1000-8000-00805f9b34fb    Manufacturer Name String    
00002a2a-0000-1000-8000-00805f9b34fb    IEEE 11073-20601 Regulatory Certification Data List    
00002a2b-0000-1000-8000-00805f9b34fb    Current Time    
00002a31-0000-1000-8000-00805f9b34fb    Scan Refresh    
00002a32-0000-1000-8000-00805f9b34fb    Boot Keyboard Output Report    
00002a33-0000-1000-8000-00805f9b34fb    Boot Mouse Input Report    
00002a34-0000-1000-8000-00805f9b34fb    Glucose Measurement Context    
00002a35-0000-1000-8000-00805f9b34fb    Blood Pressure Measurement    
00002a36-0000-1000-8000-00805f9b34fb    Intermediate Cuff Pressure    
00002a37-0000-1000-8000-00805f9b34fb    Heart Rate Measurement    
00002a38-0000-1000-8000-00805f9b34fb    Body Sensor Location    
00002a39-0000-1000-8000-00805f9b34fb    Heart Rate Control Point    
00002a3e-0000-1000-8000-00805f9b34fb    Network Availability    
00002a3f-0000-1000-8000-00805f9b34fb    Alert Status    
00002a40-0000-1000-8000-00805f9b34fb    Ringer Control Point    
00002a41-0000-1000-8000-00805f9b34fb    Ringer Setting    
00002a42-0000-1000-8000-00805f9b34fb    Alert Category ID Bit Mask    
00002a43-0000-1000-8000-00805f9b34fb    Alert Category ID    
00002a44-0000-1000-8000-00805f9b34fb    Alert Notification Control Point    
00002a45-0000-1000-8000-00805f9b34fb    Unread Alert Status    
00002a46-0000-1000-8000-00805f9b34fb    New Alert    
00002a47-0000-1000-8000-00805f9b34fb    Supported New Alert Category    
00002a48-0000-1000-8000-00805f9b34fb    Supported Unread Alert Category    
00002a49-0000-1000-8000-00805f9b34fb    Blood Pressure Feature    
00002a4a-0000-1000-8000-00805f9b34fb    HID Information    
00002a4b-0000-1000-8000-00805f9b34fb    Report Map    
00002a4c-0000-1000-8000-00805f9b34fb    HID Control Point    
00002a4d-0000-1000-8000-00805f9b34fb    Report    
00002a4e-0000-1000-8000-00805f9b34fb    Protocol Mode    
00002a4f-0000-1000-8000-00805f9b34fb    Scan Interval Window    
00002a50-0000-1000-8000-00805f9b34fb    PnP ID    
00002a51-0000-1000-8000-00805f9b34fb    Glucose Feature    
00002a52-0000-1000-8000-00805f9b34fb    Record Access Control Point    
00002a53-0000-1000-8000-00805f9b34fb    RSC Measurement    
00002a54-0000-1000-8000-00805f9b34fb    RSC Feature    
00002a55-0000-1000-8000-00805f9b34fb    SC Control Point    
00002a5b-0000-1000-8000-00805f9b34fb    CSC Measurement    
00002a5c-0000-1000-8000-00805f9b34fb    CSC Feature    
00002a5d-0000-1000-8000-00805f9b34fb    Sensor Location    
00002a63-0000-1000-8000-00805f9b34fb    Cycling Power Measurement    
00002a64-0000-1000-8000-00805f9b34fb    Cycling Power Vector    
00002a65-0000-1000-8000-00805f9b34fb    Cycling Power Feature    
00002a66-0000-1000-8000-00805f9b34fb    Cycling Power Control Point    
00002a67-0000-1000-8000-00805f9b34fb    Location and Speed    
00002a68-0000-1000-8000-00805f9b34fb    Navigation    
00002a69-0000-1000-8000-00805f9b34fb    Position Quality    
00002a6a-0000-1000-8000-00805f9b34fb    LN Feature    
00002a6b-0000-1000-8000-00805f9b34fb    LN Control Point"