ESP8266 SDK 2.0 学习记录6

最新推荐文章于 2021-12-02 09:25:46 发布

原创最新推荐文章于 2021-12-02 09:25:46 发布 · 188 阅读

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本文详细介绍了一个基于ESP8266的TCP客户端编程实例，通过连接到指定的服务器地址和端口，实现数据发送和接收的功能。文章展示了如何使用socket进行网络通信，包括设置超时时间、填充服务器地址结构、建立连接以及数据收发的具体代码。

TCPClient

#define SERVERADDR "192.168.0.106"
#define SERVERPORT 6008

void ATaskTcpClient(void *pvParameters)
{

    int iVariableExample = 0;
    int fd = -1;
    int NetTimerOut = 5000;
    int ret;
    struct sockaddr_in serverAddr;
    char Tcpmsg[48];
    STATION_STATUS StaStatus;

    do
    {
        StaStatus = wifi_station_get_connect_status();
        vTaskDelay(100);
    } while (StaStatus != STATION_GOT_IP);

    fd = socket(PF_INET, SOCK_STREAM, 0);
    if (fd == -1)
    {
        printf("get socket fail!\n");
        vTaskDelete(NULL);
    }

    setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &NetTimerOut, sizeof(int));

    memset(&serverAddr, 0, sizeof(serverAddr));
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr(SERVERADDR);
    serverAddr.sin_port = htons(SERVERPORT);
    serverAddr.sin_len = sizeof(serverAddr);

    //连接到服务端
    do
    {
        /* code */
        ret = connect(fd, (struct sockaddr *)&serverAddr, serverAddr.sin_len);
        if (ret != 0)
        {
            printf("Connect is fail!\n");
            vTaskDelay(100);
        }
    } while (ret != 0);

    for (;;)
    {
        send(fd, "I am Tcpclient", sizeof("I am Tcpclient"), 0);

        do
        {
            ret = recv(fd, Tcpmsg, 48, 0);
            if (ret > 0)
            {
                printf("TcpServer:%s\n", Tcpmsg);
            }
            else
            {
                printf("TcpServer data is no!\n");
                /* code */
            }
            vTaskDelay(100);

        } while (ret == -1);
    }

    vTaskDelete(NULL);
}

void tcdclient_int(void)
{
    xTaskCreate(ATaskTcpClient, "tcpclient", 256, NULL, 4, NULL);
}

测试结果