Linux应用，之接入到阿里云MQTT物联网平台

rjszcb

已于 2024-10-27 21:39:58 修改

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分类专栏： Linux 应用开发之杂碎文章标签： C语言

于 2024-08-02 22:10:55 首次发布

本文链接：https://blog.youkuaiyun.com/rjszcb/article/details/140881323

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后面有空，我要玩一下

linux接入到阿里云

#define SERVER_IP "asfdda.iot-as-mqtt.cn-shanghai.aliyuncs.com"//服务器IP
#define SERVER_PORT 1883 //端口号
#define ClientID "aasfsaXABf.Imasfas|securemode=2,signmethod=hmacsha256,timestamp=1678323607797|"
#define Username "ImsfeA&a1sadf8XABf"
#define Password "15566ab496e81da728a3792ebe532fd4a3f4026a2b831df5af24da06"//密文 
#define SET_TOPIC  "/sys/a14dXABf/ImagfA/thing/service/property/set"  //订阅  
#define POST_TOPIC "/sys/a14sdf8XABf/ImdfeA/thing/event/property/post"  //发布  
int main()
{
    pthread_t id;
    signal(SIGPIPE,SIG_IGN);/*忽略SIGPIPE信号*/
    signal(SIGALRM,signal_func);/*闹钟信号*/
    sockfd=socket(AF_INET,SOCK_STREAM,0);
    if(sockfd==-1)
    {
        printf("网络套接字打开失败\n");
        return 0;
    }
    /*设置发送缓冲区大小*/
	int nSendBuf=40*1024;//设置为 20K
	if(setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,(const char*)&nSendBuf,sizeof(int)))
    {
        printf("setsockopt(SO_SNDBUF) 设置错误!\n");
        return 0;
    }
	/*域名解析*/
	struct hostent *hostent;
	while(1)
	{
		hostent=gethostbyname(SERVER_IP);
		if(hostent==NULL)
		{
			printf("域名解析失败\n");
			sleep(1);
		}
		else break;
	}
	printf("主机名:%s\n",hostent->h_name);
	printf("协议类型:%s\n",(hostent->h_addrtype == AF_INET)?"AF_INET":"AF_INET6");
	printf("IP地址长度:%d\n",hostent->h_length);
	char *ip;
	for(int i=0;hostent->h_addr_list[i];i++)
	{
		ip=inet_ntoa(*(struct in_addr *)hostent->h_addr_list[i]);
		printf("ip=%s\n",ip);
	}	
    /*连接服务器*/
     struct sockaddr_in addr;
     addr.sin_family=AF_INET;//IPV4
     addr.sin_port=htons(SERVER_PORT);/*端口号*/
     addr.sin_addr.s_addr=inet_addr(ip);//服务器IP
     if(connect(sockfd, (struct sockaddr *)&addr,sizeof(struct sockaddr_in))==0)
     {
         printf("服务器连接成功\n");
         while(1)
         {
            MQTT_Init();
            /*登录服务器*/
            if(MQTT_Connect(ClientID,Username,Password)==0)
            {
                break;
            }
            sleep(1);
            printf("服务器连接中....\n");
         }
        printf("连接成功\r\n");
        //订阅物联网平台数据
        stat=MQTT_SubscribeTopic(SET_TOPIC,1,1);
        if(stat)
        {
            close(sockfd);
            printf("订阅失败\r\n");  
            exit(0);
        }
        printf("订阅成功\r\n");
        /*创建线程*/
        pthread_create(&id, NULL,pth_work_func,NULL);
        pthread_detach(id);//设置分离属性
        alarm(3);//闹钟函数，时间到达会产生SIGALRM信号
        int a=0;
        while(1)
        {  
			sprintf(mqtt_message,"{\"method\":\"thing.event.property.post\",\"params\":{\"image\":\"阿里云物联网平台测试\"}}");
            MQTT_PublishData(POST_TOPIC,mqtt_message,0);//发布数据
        }
     }
}