分布式通信子系统--让华为手机发现Hi3861开发板 精华

工具：

1. 华为手机，需要有多设备协同功能。在设置->更多连接->多设备协同，查看是否有多设备协同功能，此功能使用的就是coap协议。

2. Hi3861开发板

步骤：

1.  修改源码，发布一个Serivce

2.  启动Hi3861开发板，并连接WIFI，对Hi3861设备接收广播和响应广播处添加日志，使用串口工具查看日志。

3.  使用路由器上进行抓包。udp，端口是5684

4.  将多设备协同开关打开。在打开开关的瞬间，可以看到Hi3861开发板接收到了多条广播请求，同时对多条广播进行响应

运行结果：

可以看到Hi3861开发板对华为手机发现设备时发出的广播进行响应，但手机上并没有展示出Hi3861设备信息，可能是还需要一些其他信息，或者传递的信息手机并不支持，具体原因不详，不清楚手机端对Hi3861发送的响应报文是如何处理的，但Hi3861通过HarmonyOS系统能力，已经能成功与手机进行交互了。下一步就是通过解决如何在手机上展示并通过HarmonyOS系统能力进行通信，如获取设备温度。

下面一张截图中手机的IP是192.168.1.216，Hi3861开发板的IP是192.168.1.232，可以看到开发板对手机广播的成功响应。

[18:56:32.719]收←◆ready to OS start
sdk ver:Hi3861V100R001C00SPC025 2020-09-03 18:10:00
formatting spiffs...

[18:56:33.040]收←◆FileSystem mount ok.
wifi init success!

GetService name:GetService name:

get feature name.

GetService name:

get feature name.

[Register Test][TaskID:954112][Step:0][Reg S:example, F:example] Time: 330!
GetService name:

GetService name:

GetService name:[Boot Test][TaskID:0xe8c44][Step:1][Reg Finish S:example]Time: 340!
GetService name:Register Test,Oninit1Register Test,Oninit

[DISCOVERY] InitLocalDeviceInfo ok
[DISCOVERY] Init socket success.
[DISCOVERY] liteos_m init wifi event.
[DISCOVERY]CoapInitWifiEvent()
[DISCOVERY]CreateMsgQue()
[DISCOVERY]OnWifiConnectionChanged bind.()
[DISCOVERY]RegisterWifiEvent()
[DISCOVERY]RegisterWifiEvent success.
[DISCOVERY]create message queue task.
[DISCOVERY]create message queue success.
[DISCOVERY] init cop listen thread.
[DISCOVERY] CreateCoapListenThread
[DISCOVERY] CreateCoapListenThread2
[DISCOVERY]CoapWriteMsgQueue().
[DISCOVERY] InitService ok
[DISCOVERY] PublishCallback publishId=1, result=0
demo service publish success.1get feature name.GetService name:[DISCOVERY]ReadMsgQue().
[DISCOVERY]CoapHandleWifiEvent().
[DISCOVERY] WifiEventTrigger 1.
[DISCOVERY] WifiEventTrigger[DISCOVERY] CoapReadHandle()
[DISCOVERY] CoapReadHandle coin select begin
[DISCOVERY] CoapReadHandle, select
 GetCommonDeviceInfo is success.
[DISCOVERY] CoapGetIp().
[DISCOVERY] WifiEventTrigger .
[DISCOVERY] WifiEventTrigger ret is 0.
[DISCOVERY] WifiEventTrigger BusManager().
[TRANS] OpenTcpServer inet_pton fail, rc=0:(null)
[TRANS] InitListenFd OpenTcpServer fail
[AUTH] StartBus StartListener fail
[DISCOVERY] WifiEventTrigger StartBusManager(1) fail
[DISCOVERY]ReadMsgQue().
00 00:00:00 0 68 D 0/HIVIEW: hilog init success.
00 00:00:00 0 68 D 0/HIVIEW: log limit init success.
00 00:00:00 0 68 I 1/SAMGR: Bootstrap core services(count:3).
00 00:00:00 0 68 I 1/SAMGR: Init service:0x4c4c14 TaskPool:0xfa9a4
00 00:00:00 0 68 I 1/SAMGR: Init service:0x4c4c38 TaskPool:0xfb014
00 00:00:00 0 68 I 1/SAMGR: Init service:0x4c6d88 TaskPool:0xfb1d4
00 00:00:00 0 100 I 1/SAMGR: Init service 0x4c4c38 <time: 0ms> success!
00 00:00:00 0 0 I 1/SAMGR: Init service 0x4c4c14 <time: 0ms> success!
00 00:00:00 0 200 D 0/HIVIEW: hiview init success.
00 00:00:00 0 200 I 1/SAMGR: Init service 0x4c6d88 <time: 0ms> success!
00 00:00:00 0 200 I 1/SAMGR: Initialized all core system services!
00 00:00:00 0 0 I 1/SAMGR: Bootstrap system and application services(count:1).
00 00:00:00 0 0 I 1/SAMGR: Init service:0x4c4cf0 TaskPool:0xeba70
00 00:00:00 0 68 I 1/SAMGR: Init service 0x4c4cf0 <time: 80ms> success!
00 00:00:00 0 68 I 1/SAMGR: Initialized all system and application services!
00 00:00:00 0 0 I 1/SAMGR: Bootstrap dynamic registered services(count:0).

[18:56:53.855]发→◇AT+STARTSTA




□
[18:56:53.860]收←◆AT+STARTSTAbusy!

busy!
busy!
OK


[18:57:03.997]发→◇AT+CONN=,86:73:03:de:fc:14,3,"12345678"





□
[18:57:04.002]收←◆AT+CONN=,86:73:03:de:fc:14,3,"12345678"busy!
busy!
busy!

busy!
OK


[18:57:04.780]收←◆+NOTICE:SCANFINISH

[18:57:05.265]收←◆+NOTICE:CONNECTED
[DISCOVERY]CoapConnectionChangedHandler().
[DISCOVERY]CoapWriteMsgQueue().
[DISCOVERY]CoapHandleWifiEvent().
[DISCOVERY] WifiEventTrigger 1.
[DISCOVERY] WifiEventTrigger GetCommonDeviceInfo is success.
[DISCOVERY] CoapGetIp().

[18:57:20.196]发→◇AT+DHCP=wlan0,1


□
[18:57:20.200]收←◆AT+DHCP=wlan0,1busy!
busy!

OK


[18:57:21.210]收←◆[DISCOVERY] WifiEventTrigger 192.168.43.112.
[DISCOVERY] WifiEventTrigger ret is 0.
[DISCOVERY] WifiEventTrigger BusManager().
[TRANS] OpenTcpServer inet_pton rc=1
[TRANS] OpenTcpServer fd=1
[TRANS] WaitProcess begin
[TRANS] StartListener ok
[TRANS] OpenTcpServer inet_pton rc=1
[TRANS] OpenTcpServer fd=2
[TRANS] StartSelectLoop create trans_session_task
[TRANS] SelectSessionLoop begin
[AUTH] StartBus ok
[DISCOVERY] WifiEventTrigger CoapRegisterDeviceInfo().
[DISCOVERY]ReadMsgQue().

[18:57:36.642]收←◆[DISCOVERY] HandleReadEvent()
[DISCOVERY] COAP_SoftBusDecode()
[DISCOVERY] PostServiceDiscover()
[DISCOVERY] GetServiceDiscoverInfo()
[DISCOVERY] GetServiceDiscoverInfo()
[DISCOVERY] ParseServiceDiscover()
{"deviceId":"{\"UDID\":\"EB1204FC4F250C892EBD67E46D0CEA03FFC16347541C95954434F22494231CCE\"}","devicename":"nova 5 Pro","type":14,"hicomversion":"2.1.0.0","mode":1,"deviceHash":"2850086000394994110","serviceData":"","wlanIp":"192.168.43.241","capabilityBit[DISCOVERY] ParseServiceDiscover(coap://192.168.43.241/device_discover)
[DISCOVERY]CoapResponseService().
[DISCOVERY]PrepareServiceDiscover().
[DISCOVERY]init data().
{"deviceId":"{\"UDID\":\"BE753141CDEC87CE61D564BFD84C908E966011DEB00BF46690FC97B133AA795B\"}","devicename":"DEV_L0","type":241,"hicomversion":"","mode":0,"deviceHash":"4174638","serviceData":"port:56968,,","wlanIp":"192.168.43.112","capabilityBitmap":[64]}[DISCOVERY]CoapSendRequest().
[DISCOVERY]CoapSendRequest remote ip:192.168.43.241.
CoapSocketSend:3,294
send result:294\[DISCOVERY]send success.
[DISCOVERY] CoapReadHandle, select
[DISCOVERY] HandleReadEvent()
[DISCOVERY] COAP_SoftBusDecode()
[DISCOVERY] PostServiceDiscover()
[DISCOVERY] GetServiceDiscoverInfo()
[DISCOVERY] GetServiceDiscoverInfo()
[DISCOVERY] ParseServiceDiscover()
{"deviceId":"{\"UDID\":\"EB1204FC4F250C892EBD67E46D0CEA03FFC16347541C95954434F22494231CCE\"}","devicename":"nova 5 Pro","type":14,"hicomversion":"2.1.0.0","mode":1,"deviceHash":"2850086000394994110","serviceData":"","wlanIp":"192.168.43.241","capabilityBit

[DISCOVERY] ParseServiceDiscover(coap://192.168.43.241/device_discover)
[DISCOVERY]CoapResponseService().
[DISCOVERY]PrepareServiceDiscover().
[DISCOVERY]init data().
{"deviceId":"{\"UDID\":\"BE753141CDEC87CE61D564BFD84C908E966011DEB00BF46690FC97B133AA795B\"}","devicename":"DEV_L0","type":241,"hicomversion":"","mode":0,"deviceHash":"4174638","serviceData":"port:56968,,","wlanIp":"192.168.43.112","capabilityBitmap":[64]}[DISCOVERY]CoapSendRequest().
[DISCOVERY]CoapSendRequest remote ip:192.168.43.241.
CoapSocketSend:4,294
send result:294\[DISCOVERY]send success.
[DISCOVERY] CoapReadHandle, select