写一个定时5秒一次获取地磅实时重量并直接发送给网站（c#）

您可以使用C#中的Timer类来实现定时任务。以下是一个简单的示例代码，可以在每5秒钟获取地磅实时重量并将其发送到网站。

using System;
using System.Net;
using System.Text;
using System.IO;
using System.IO.Ports;
using System.Timers;

public class Program
{
    private static Timer timer;
    private static SerialPort serialPort;
    private static string websiteUrl = "http://yourwebsite.com/update_weight.php";

    public static void Main()
    {
        // 初始化串口
        serialPort = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
        serialPort.Open();

        // 初始化计时器
        timer = new Timer();
        timer.Interval = 5000; // 设置定时器间隔为5秒
        timer.Elapsed += new ElapsedEventHandler(OnTimerElapsed);
        timer.Enabled = true;

        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();

        // 关闭串口和计时器
        serialPort.Close();
        timer.Enabled = false;
    }

    private static void OnTimerElapsed(object sender, ElapsedEventArgs e)
    {
        // 读取串口数据
        string weight = serialPort.ReadLine().Trim();

        // 发送HTTP请求
        string postData = "weight=" + weight;
        byte[] postDataBytes = Encoding.UTF8.GetBytes(postData);

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(websiteUrl);
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.ContentLength = postDataBytes.Length;

        using (Stream requestStream = request.GetRequestStream())
        {
            requestStream.Write(postDataBytes, 0, postDataBytes.Length);
        }

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
            // 处理响应数据
            Stream responseStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(responseStream);
            string responseText = reader.ReadToEnd();

            Console.WriteLine("Server response: " + responseText);
        }
    }
}

请注意，上述代码仅供参考，您需要根据实际情况进行调整。例如，您需要根据您的地磅和网站的具体接口来编写读取重量和发送HTTP请求的代码。