#DAYU200体验官#农业喷灌的可视化控制 原创 精华

static void TCPServerTask(void)
{
	//服务端地址信息
	struct sockaddr_in server_sock;
	//客户端地址信息
	struct sockaddr_in client_sock;
	int sin_size;
	struct sockaddr_in *cli_addr;
	//连接Wifi,
	WifiConnect("******", "********");
	//创建socket
	if ((sock_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		perror("socket is error\r\n");
		exit(1);
	}
	bzero(&server_sock, sizeof(server_sock));
	server_sock.sin_family = AF_INET;
	server_sock.sin_addr.s_addr = htonl(INADDR_ANY);
	server_sock.sin_port = htons(_PROT_);
	//调用bind函数绑定socket和地址
	if (bind(sock_fd, (struct sockaddr *)&server_sock, sizeof(struct sockaddr)) == -1)
	{
		perror("bind is error\r\n");
		exit(1);
	}
	//调用listen函数监听(指定port监听)
	if (listen(sock_fd, TCP_BACKLOG) == -1)
	{
		perror("listen is error\r\n");
		exit(1);
	}
	printf("start accept\n");
	//调用accept函数从队列中
	while (1)
	{
		sin_size = sizeof(struct sockaddr_in);
		if ((new_fd = accept(sock_fd, (struct sockaddr *)&client_sock, (socklen_t *)&sin_size)) == -1)
		{
			perror("accept");
			continue;
		}
		cli_addr = malloc(sizeof(struct sockaddr));
		printf("accept addr\r\n");
		if (cli_addr != NULL)
		{
			memcpy(cli_addr, &client_sock, sizeof(struct sockaddr));
		}
		//处理目标
		ssize_t ret;
		while (1)
		{
			if ((ret = recv(new_fd, recvbuf, sizeof(recvbuf), 0)) == -1)
			{
				printf("recv error \r\n");
			}
			if(NULL != strstr(recvbuf,"ON")) {
			    printf("START ON  !\r\n");
				IoTGpioSetOutputVal(8, 1);
			    IoTGpioSetOutputVal(14, 1);
			}
	        if(NULL != strstr(recvbuf,"OFF")) {
				printf("START OFF !\r\n");
				IoTGpioSetOutputVal(8, 0);
			    IoTGpioSetOutputVal(14, 0);
			}
			if ((ret = send(new_fd, buf, strlen(buf) + 1, 0)) == -1)
			{
				perror("send : ");
			}
			sleep(1);
		}
		close(new_fd);
	}
}
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//import需要的socket模块
import socket from '@ohos.net.socket';
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//创建一个TCPSocket连接，返回一个TCPSocket对象
let tcp = socket.constructTCPSocketInstance();
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//订阅TCPSocket相关的事件
tcp.on('message', value => {
      console.log("on message")
      let buffer = value.message
      let dataView = new DataView(buffer)
      let str = ""
      for (let i = 0;i < dataView.byteLength; ++i) {
        str += String.fromCharCode(dataView.getUint8(i))
      }
      console.log("***on connect received:" + str)
      this.receive_data=str;
    });

    tcp.on('connect', () => {
      console.log("***on connect");
      this.llog="on.con ok";
    });

    tcp.on('close', () => {
      console.log("***on close");
      this.llog="on.close ok";
    });
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//绑定本机IP地址和指定的端口，端口使用中也会由系统随机分配
let bindAddress = {
      address: '192.168.*.*',
      port: 1234,
      family: 1
    };

    tcp.bind(bindAddress, err => {
      if (err) {
        console.log('***bind fail');
        return;
      }
      console.log('***bind success');
      this.llog="bind ok";
    });
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//连接到主控3861的IP地址和端口
tcp.connect({ address: {address: '192.168.*.*', port: 8888, family: 1} , timeout: 6000}, err => {
      if (err) {
        console.log('***connect fail');
        return;
      }
      console.log('***connect success');
    });
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//向3861发送启动指令
this.app_msg = "ON";
    tcp.send({
      data: this.app_msg,
    }, err => {
      if (err) {
        console.log('send fail');
        return;
      }
    });

//向3861发送停止指令
this.app_msg = 'OFF';
    tcp.send({
      data: this.app_msg,
    }, err => {
      if (err) {
        console.log('send fail');
        return;
      }
    });
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