CC254x(cc2540/cc2541)的微信AirSync调试笔记

一、前言

本尊自诩为IOT小能手，一直没涉足蓝牙实在说不过去。刚好上个月底的时候计划做个BLE设备，这阵子利用业余时间自学了BLE协议栈，了解了GATT，磕磕绊绊完成CC254x(cc2540/cc2541)的微信AirSync。就在今晚，听着Coldplay的“Be my mirror, my sword and shield”雄心万丈，大千世界和AirSync都被我征服，终于完成了最后一步的测试。

二、常见问题及措施

我把自己遇到的几个问题及解决方案都记录在这边，应该会让一些朋友少走一些弯路。

1. 广播包中没有 manufacture specific data 字段，或不以MAC地址结尾。

 
措施：广播包中必须带上0xFF的厂商自定义字段，09+ FF + 厂商ID(2 Bytes) + MAC(6 Bytes)。

2. Mac address 校验失败！

这是我之前调试的错误提示：

***** onTestIsValidAuthReqPack *****
result = false, is an invalid auth request pack: AuthRequestPack: FE 01 00 32 27 11 00 01 0A 00 18 84 80 04 20 01 28 02 3A 06 57 65 43 68 61 74 62 16 57 65 43 68 61 74 42 6C 75 65 74 6F 6F 74 68 44 65 76 69 63 65 00
has BaseRequest
no Md5DeviceTypeAndDeviceId field!
has MacAddress field, Mac Address = 57 65 43 68 61 74
MacAddress BitLength = 48bit
Mac Address from broadcast record = 90:59:AF:0E:62:88
Mac address 校验失败！
has ProtoVersion field, ProtoVersion = 65540
has AuthProto field, AuthProto = 1
has AuthMethod field, AuthMethod = EAM_macNoEncrypt
no AesSign field!
has DeviceName field, DeviceName = WeChatBluetoothDevice

措施：在AUTH REQ中也有Mac字段，需要保证MAC地址和广播包中的一样。

3. Read Characteristic is not read able!

4. Can not Start Indicate permision:Can not get configure descriptor

措施：这两个处理，要保证Read Characteristic有可读权限，然后Read Char的值必须为MAC地址。

5. async write data error

措施：这个问题很多，但是解决思路都固定，就是在https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE 
找错误码。

我的错误码是03，说是手机没有写权限。

public static final int GATT_WRITE_NOT_PERMITTED
Added in API level 18 GATT write operation is not permitted 

Constant Value: 3 (0x00000003)

后来一查，果然我的Write CHAR没有write权限。

三、AirSync的完整日志

这边把完整的LOG日志提供出来,希望对其他调试AirSync的朋友有所帮助。

*****************BLE： TwoWinter******************

***** onTestBroadcastRecord *****
result = true, Has 0xfee7 or standard service in broadcast record

广播包：     E7 FE  FF 0D    AF 0E   0A    6F   6E           0A                           

***** onTestManufatureData *****
resut= true, 广播包中 manufacture specific data 字段中MAC地址校验成功.

***** onDiscoverService *****
result = true, DiscoverService success
Discovered Services
ServiceUUID: ----00805f9b34fb
ServiceUUID: ----00805f9b34fb
ServiceUUID: 0000180a----00805f9b34fb
ServiceUUID: 0000fee7----00805f9b34fb

***** onTestHasWeChatService *****
result = true, has WeChatService or standard service

***** onTestHasIndicateCharacteristic *****
result = true, has WeChat Indicate Characteristic

***** onTestHasWriteCharacteristic *****
result = true, has Wechat Write Characteristic

***** onTestHasReadCharacteristic *****
result = true, Has WeChat read characteristic

***** onTestWriteCharacteristicPermisson *****
result = true, has Write permission

***** onTestIndicateCharacteristicPermisson *****
result = true, has Indication permission

***** onTestReadCharacteristicPermisson *****
result = true, Read Characteristic is read able

***** onTestStartIndicating *****
result = true, can Start Indicate

***** onConnected *****
result = true, connected

------onDataReceived------
data length =
data dump = FE        0A          3A
data receive seq = 

------onDataReceived------
data length =
data dump =   AF 0E     6D
data receive seq = 

***** onTestRecvAuthReqtWhenStartedIndicating *****
result = true, received auth request pack

***** onTestIsValidAuthReqPack *****
result = true, is a valid auth request pack
AuthRequestPack: FE        0A          3A    AF 0E     6D
has BaseRequest
no Md5DeviceTypeAndDeviceId field!
has MacAddress field, Mac Address =   AF 0E
MacAddress BitLength = 48bit
Mac Address ::AF:0E::
Mac address checkout success
has ProtoVersion field, ProtoVersion =
has AuthProto field, AuthProto =
has AuthMethod field, AuthMethod = EAM_macNoEncrypt
no AesSign field!
has DeviceName field, DeviceName = mydevice

**** send auth response ****
data len =
data dump = FE   0E 4E    0A      

------onDataReceived------
data length =
data dump = FE        0A  1A
data receive seq = 

***** onTestRecvInitReqPack *****
result = true, received init request pack

***** onTestIsValidInitReqPack *****
result = true, valid init request pack: has BaseRequest
has Challenge field, Challenge =     

**** send init request response ****
data len =
data dump = FE    4E    0A     B4   F8 AC   D1 BB CA BF  

------onDataReceived------
data length =
data dump = FE        0A   0C FE CF
data receive seq = 

------onDataReceived------
data length =
data dump =
data receive seq = 

*** receive SendDataRequest ****
date type = manufactureSvr data
data len =
data dump = 0A   0C FE CF           

**** send SendData Response(echo request) ****
data len =
data dump = FE   1E 4E    0A      0A   0C FE CF           

***** onTestIsValidSendDataRequest *****
result = true, is a valid SendDataRequest pack: has BaseRequest field
has Data field, data = FE CF
no Type field, use default manufactureSvr data type

**** send ManufactureSvr Push ****
data len =
data dump = FE        0A              

**** send Html Push ****
data len =
data dump = FE        0A              4E 

**** send wxWristBand Push ****
data len =
data dump = FE   0E     0A      

**** send EnterDeviceChatView Push ****
data len =
data dump = FE   0E     0A      

**** send Exit ChatView Push ****
data len =
data dump = FE   0E     0A      

**** send Enter HtmlChatView Push ****
data len =
data dump = FE   0E     0A      

**** send Exit HtmlChatView Push ****
data len =
data dump = FE   0E     0A      

**** send enterBackground Push ****
data len =
data dump = FE   0C     0A    

**** send enterForground Push ****
data len =
data dump = FE   0C     0A    

**** send enterSleep Push ****
data len =
data dump = FE   0C     0A    

*****Disconnected Device*****