[网络协议]基于C#的modbus Tcp协议的数据抓取和解析

1. 基于Modbus tcp 协议的数据抓取，并解析，源码使用C#开发

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace modbus
{
    class Program
    {


        #region 字节转换为16进制字符

        /// <summary>
        /// 字节转换为16进制字符
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>jiang
        static string ByteToHexString(byte[] data)
        {
            string strTemp = "";
            for (int i = 2; i < data.Length; i++)
            {
                string a = Convert.ToString(data[i], 16).PadLeft(2, '0');
                strTemp = strTemp + a;
            }
            return strTemp.Substring(0, 100);
        }

        #endregion


        #region 16进制字符转换为字节

        /// <summary>
        /// 16进制字符转换为字节
        /// </summary>
        /// <param name="hs"></param>
        /// <returns></returns>
        static byte[] HexString(string hs)
        {
            hs = hs.Replace(" ", "");
            string strTemp = "";
            byte[] b = new byte[hs.Length / 2];
            for (int i = 0; i < hs.Length / 2; i++)
            {
                strTemp = hs.Substring(i * 2, 2);
                b[i] = Convert.ToByte(strTemp, 16);
            }
            return b;
        }

        #endregion


        #region 发送、接收报文并返回报文
        /// <summary>
        /// 發送或接受風機指令
        /// </summary>
        /// <param name="sendCodeMeg">指令</param>
        /// <param name="IpAddress">IP地址</param>
        /// <param name="panelIP">面板IP</param>
        /// <returns></returns>
        static string SendPack(string sendCodeMeg, string IpAddress, int port)
        {

            IPAddress ip = IPAddress.Parse(IpAddress);
            Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                Console.WriteLine("開始發送數據。。。");
                clientSocket.Connect(new IPEndPoint(ip, port)); //配置服务器ip和端口
                //TcpClient tcpClient = new TcpClient(); 



                Console.WriteLine("服务器连接成功");
            }
            catch
            {
                Console.WriteLine("连接服务器失败\n");
                return null;
            }
            try
            {

                string sendMessage = sendCodeMeg; // "6B 00 00 00 00 06 02 06 05 10 00 01"; //发送到服务端的内容
                var sendData = HexString(sendMessage);
                string recvStr = null;
                int bytes;
                try
                {
                    Console.WriteLine("发送报文：{0}", sendMessage);
                    clientSocket.Send(sendData);//向服务器发送数据 
                    byte[] recvBytes = new byte[1024];
                    //连接时长500ms
                    clientSocket.ReceiveTimeout = 5000;
                    bytes = clientSocket.Receive(recvBytes, recvBytes.Length, 0); //服务端接受返回信息
                    recvStr += ByteToHexString(recvBytes);
                }
                catch (Exception ex)
                {
                    Console.WriteLine("出现错误！\n{0}\n\n", ex);
                    recvStr = null;
                }
                if (recvStr != null)
                {
                    Console.WriteLine("获取成功！\n 获得数据:{0}\n\n", recvStr);
                }

                clientSocket.Close();//关闭连接释放资源
                                     //Console.ReadLine();
                return recvStr;
            }
            catch
            {
                Console.WriteLine("出现错误！\n");
                return null;
            }
        }

        #endregion


        //主函数
        static void Main(string[] args)
        {
            Console.WriteLine("开始！");

            string IP = "10.139.49.61";
            int port = 502;
            int fnu = 4;
            string a = fnu.ToString("x2");


            string sendCodeMeg1 = "02 00 00 00 00 06 01 03 01 10 00 02";

            string sendCodeMeg2 = "03 00 00 00 00 06 01 03 01 0A 00 02";

            string data1 = null;
            string data2 = null;
            for (int num = 0; num < 5; num++)
            {
                Console.WriteLine("第{0}次调用Get_Fan函数！\n", num + 1);
                data1 = SendPack(sendCodeMeg1, IP, port);
                if (data1 != null)
                {
                    break;
                }
            }


            for (int num = 0; num < 5; num++)
            {
                Console.WriteLine("第{0}次调用Get_Fan函数！\n", num + 1);
                data2 = SendPack(sendCodeMeg2, IP, port);
                if (data2 != null)
                {
                    break;
                }

            }

            Console.WriteLine("结束");
            Console.ReadKey();
        }

    }
}