ESP8266 SDK 2.0 学习记录5

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 · 231 阅读

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本文详细介绍了在ESP8266平台上实现UDP服务器的过程，包括socket创建、bind绑定、recvfrom接收数据以及sendto发送回应。代码示例展示了如何处理网络超时，并在接收到客户端消息后进行blink功能响应。

UDPServer

和Client不同的是要实现blink功能

#define SERVERADDR "192.168.0.106"
#define SERVERPORT 6008

void ATaskUdpServer(void *pvParameters)
{

    int iVariableExample = 0;
    int fd = -1;
    int NetTimerOut = 5000;
    int ret;
    struct sockaddr_in serverAddr;
    struct sockaddr from;
    socklen_t fromlen = sizeof(struct sockaddr);
    char udpmsg[48];
    STATION_STATUS StaStatus;

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

    fd = socket(PF_INET, SOCK_DGRAM, 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 = INADDR_ANY;
    serverAddr.sin_port = htons(SERVERPORT);
    serverAddr.sin_len = sizeof(serverAddr);

    if(bind(fd, (struct sockaddr*)&serverAddr, serverAddr.sin_len) != 0)
    {
        printf("bind socket fail!\n");
        vTaskDelete(NULL);
        return;
    }

    for (;;)
    {
        do
        {
            ret = recvfrom(fd, udpmsg, 48, 0, &from, &fromlen);
            if (ret > 0)
            {
                printf("UdpCient:%s\n", udpmsg);
            }
            else
            {
                printf("UdpClent data is no!\n");
                /* code */
            }
            vTaskDelay(100);

        } while (ret == -1);

        sendto(fd, "I am udpServer", sizeof("I am udpclient"), 0, &from, fromlen);

    }

    vTaskDelete(NULL);
}

void updserver_int(void)
{
    xTaskCreate(ATaskUdpServer, "udpserver", 256, NULL, 4, NULL);
}

测试结果

串口数据: