当前位置 博文首页 > unity工具人的博客：C#串口通信三步走
第一步：实例化串口通讯类
SerialPort sp = new SerialPort();
第二步：设置串口信息并打开串口
//串口设置
public void SetSP(string PortName,string BaudRate,string DataBits,string StopBits,string Command)
{
sp.Close();
sp.PortName = PortName;//串口号
sp.BaudRate = int.Parse(BaudRate);//波特率
sp.DataBits = int.Parse(DataBits);//数据位
sp.StopBits = (StopBits)int.Parse(StopBits);//停止位
sp.ReadTimeout = 500;//读取数据的超时时间，引发ReadExisting异常
bntSwitchSP_Click(Command);//开串口
}
//打开串口
private void bntSwitchSP_Click()
{
if (sp.PortName!= "" && sp.BaudRate!= "" && sp.DataBits!= "" && sp.StopBits!= "")
{
try
{
if (sp.IsOpen)
{
sp.Close();
sp.Open();//打开串口
}
else
{
sp.Open();//打开串口
}
}
catch (Exception ex)
{
MessageBox.Show("错误：" + ex.Message, "C#串口通信");
}
}
else
{
MessageBox.Show("请先设置串口！", "RS232串口通信");
}
}
第三步：发送指令
//发送数据
public void ToSendMessage()
{
if (sp.IsOpen)
{
try
{
sp.Encoding = System.Text.Encoding.GetEncoding("GB2312");
string Command = "100110010001111101";
//发送数据(类型：十六进制)
sp.Write(strToHexByte(Command ), 0, strToHexByte(Command ).Length);
发送数据(类型：字符串)
//sp.Write(SerialCommand);
//发送成功！
}
catch (Exception ex)
{
MessageBox.Show("错误：" + ex.Message);
}
}
else
{
MessageBox.Show("串口未打开！");
}
}
// 字符串转换成16进制编码
private byte[] strToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0) hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Replace(" ", ""), 16);
return returnBytes;
}
大功告成，学会了没有啊
监听串口信息可以参考下方脚本（我没试过不保证有效）
监听：
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace HtTcp
{
public delegate void ITCPAcsEvents_OnEventEventHandler(string _Type, string _ReturnValue);
public class HtTcpAcs
{
public event ITCPAcsEvents_OnEventEventHandler OnEvent;
public HtTcpAcs()
{
}
public void HtTcpAcsx(string IpAddress,int IpPorts)
{
Socket serverSocket;
IPEndPoint ephost = new IPEndPoint(IPAddress.Parse(IpAddress), IpPorts);
serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
#region 发送接收
try
{
int counter = 0;
string retrunValue = "";
string retrunType = "";
serverSocket.Connect(ephost);
while (true)
{
//接收的消息 暂定获取1M数据
Byte[] recvBytes = new Byte[2048];
Int32 bytes = serverSocket.Receive(recvBytes, recvBytes.Length, SocketFlags.None);
string msg = TcpDataHelp.ToHexString(recvBytes, recvBytes.Length).ToUpper();
//截取有效帧数据
int i = msg.IndexOf("3A") + 2;
int j = msg.IndexOf("0D0A");
string strred = msg.Substring(i, j - i);
string strxy = strred.Substring(0, strred.Length - 2);
string strbd = strred.Substring(strred.Length - 2, 2);
if (TcpValidate.CheckSumgz(strxy) == strbd)
{
//获取编码
string funCode = strxy.Substring(2, 2);
//判断编码 区分数据解析函数
switch (funCode)
{
retrunValue = Convert.ToInt64(strxy.Substring(4, strxy.Length - 4), 16).ToString();
}
if (OnEvent!=null)
{
OnEvent(funCode, retrunValue);
}
}
//Thread.Sleep(100);
}
}
catch (Exception ex)
{
MessageBox.Show(<span style="font-family: Arial, Helvetica, sans-serif;">"连接/发送/接收过程中，发生了错误！\r\n"</span><span style="font-family: Arial, Helvetica, sans-serif;">)</span>
}
finally
{
serverSocket.Close();
}
#endregion
}
//监听控制器
}
}
原文链接：https://blog.csdn.net/li_ser/article/details/52681353
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