以太网通讯

接口开发笔记-WebApi-CSDN博客

以太网常用通讯协议

1、modbus tcp

using EasyModbus;
using System;class Program
{static void Main(string[] args){// 创建Modbus客户端实例ModbusClient modbusClient = new ModbusClient("192.168.1.100"); // IP地址modbusClient.Port = Modbus.Port.TcpPort(502); // Modbus TCP端口，默认是502modbusClient.UnitIdentifier = 1; // Modbus单元标识符，根据你的设备设置try{// 连接服务器modbusClient.Connect();// 读取保持寄存器，例如从地址0开始的4个寄存器ushort[] registers = modbusClient.ReadHoldingRegisters(0, 4);Console.WriteLine("Read registers:");foreach (ushort reg in registers){Console.WriteLine(reg);}}catch (Exception ex){Console.WriteLine("Error: " + ex.Message);}finally{// 断开连接if (modbusClient.Connected){modbusClient.Disconnect();}}}
}

2.Socket编程

//示例代码：TCP客户端using System;
using System.Net;
using System.Net.Sockets;
using System.Text;class TCPClientExample
{static void Main(){// 创建Socket对象Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);// 连接到服务器clientSocket.Connect("127.0.0.1", 12345); // 服务器IP和端口// 发送数据string message = "Hello, Server!";byte[] byteData = Encoding.ASCII.GetBytes(message);clientSocket.Send(byteData);// 接收数据byte[] receivedBytes = new byte[1024];int bytesReceived = clientSocket.Receive(receivedBytes);string response = Encoding.ASCII.GetString(receivedBytes, 0, bytesReceived);Console.WriteLine("Received: " + response);// 关闭连接clientSocket.Shutdown(SocketShutdown.Both);clientSocket.Close();}
}

//示例代码：TCP服务器using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;class TCPServerExample
{public static void StartListening(){// 创建Socket对象Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 12345); // 监听端口12345serverSocket.Bind(localEndPoint); // 绑定端口serverSocket.Listen(10); // 最大连接数10Console.WriteLine("Server started...");while (true){Socket clientSocket = serverSocket.Accept(); // 接受客户端连接请求Thread receiveThread = new Thread(new ParameterizedThreadStart(ReceiveMessage)); // 开启新线程处理客户端请求receiveThread.Start(clientSocket); // 启动线程处理客户端请求}}private static void ReceiveMessage(object clientSocketObj){Socket clientSocket = (Socket)clientSocketObj;byte[] buffer = new byte[1024]; // 接收缓冲区int bytesReceived = clientSocket.Receive(buffer); // 接收数据长度string data = Encoding.ASCII.GetString(buffer, 0, bytesReceived); // 将字节转换为字符串Console.WriteLine("Received: " + data); // 输出接收到的数据string response = "ACK"; // 响应消息byte[] byteData = Encoding.ASCII.GetBytes(response); // 将字符串转换为字节数组并发送回去clientSocket.Send(byteData); // 发送响应数据到客户端clientSocket.Shutdown(SocketShutdown.Both); // 关闭连接clientSocket.Close(); // 关闭套接字对象}static void Main() { StartListening(); }
}