目录：

工具

步骤

运行结果

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 success!

00 00:00:00 0 0 I 1/SAMGR: Init service 0x4c4c14 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 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 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

作者：mb5f8960971f61a

想了解更多内容，请访问： 51CTO和华为官方战略合作共建的鸿蒙技术社区https://harmonyos.51cto.com

【免费直播公开课- 让鸿蒙智能家居开发板与AWS IoT云完美连通 】