驱动开发实战之TcpClient

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所属分类:.NET技术
摘要

假设你有一批非标设备需要对接,对方提供了如下协议文档:设备作为TCPServer,端口6666
字节序:Little-Endian,即低地址存放低位


场景模拟

假设你有一批非标设备需要对接,对方提供了如下协议文档:

协议概述

设备作为TCPServer,端口6666
字节序:Little-Endian,即低地址存放低位

请求回复

需要你主动发起读取请求:0x01 02 03 04
设备回复:0x08 01 41 D6 3D 71 1A 20

参数说明

  1. 总字节数

    (byte[0])即0x08:用于简单的校验

  2. 运行状态

    (byte[1])即0x01:1为运行;其他为停止

  3. 设备温度

    (byte[2]-byte[5])即0x41 D6 3D 71:单精度浮点数值26.78

  4. 电机转速

    (byte[6]-byte[7])即0x1A 20:对应16进制无符号整型,倍率0.01值66.88

驱动开发

我们根据上面的协议,开发驱动。请先浏览上一篇驱动简介

创建驱动项目

  1. 在解决方案->Drivers文件夹,右键添加->新建项目->C#类库
    驱动开发实战之TcpClient

  2. 项目名DriverSimTcpClient,放在iotgatewayPluginsDrivers路径下
    驱动开发实战之TcpClient

  3. 修改Class1SimTcpClient

  4. 双击项目,修改配置
    驱动开发实战之TcpClient

<Project Sdk="Microsoft.NET.Sdk">   <PropertyGroup>   	<TargetFramework>net6.0</TargetFramework>   	<OutputPath>../../../IoTGateway/bin/Debug/net6.0/drivers</OutputPath>   	<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>   	<ImplicitUsings>enable</ImplicitUsings>   	<Nullable>enable</Nullable>   </PropertyGroup>   <ItemGroup>     <PackageReference Include="SimpleTCP.Core" Version="1.0.4" />   </ItemGroup>   <ItemGroup>   	<ProjectReference Include="....PluginInterfacePluginInterface.csproj" />   </ItemGroup> </Project> 

:::info 说明

OutputPath节点指定了生成项目的文件夹

SimpleTCP.Core是一个TCP客户端库(你也可以自己写)

ProjectReference节点引用了PluginInterface项目

CopyLocalLockFileAssemblies节点可以确保你引用的nuget拷贝到driver文件夹下
:::

编写项目代码

using PluginInterface; using SimpleTCP; using System; using System.Text;  namespace DriverSimTcpClient {   [DriverSupported("SimTcpServerDevice")]   [DriverInfoAttribute("SimTcpClient", "V1.0.0", "Copyright iotgateway© 2022-06-04")]   public class SimTcpClient : IDriver   {       /// <summary>       /// tcp客户端       /// </summary>       private SimpleTcpClient? client;       /// <summary>       /// 缓存最新的服务器返回的原始数据       /// </summary>       private byte[] latestRcvData;       #region 配置参数        [ConfigParameter("设备Id")]       public Guid DeviceId { get; set; }        [ConfigParameter("IP地址")]       public string IpAddress { get; set; } = "127.0.0.1";        [ConfigParameter("端口号")]       public int Port { get; set; } = 6666;        /// <summary>       /// 为了演示枚举类型在web端的录入,这里没用到 但是你可以拿到       /// </summary>       [ConfigParameter("连接类型")]       public ConnectionType ConnectionType { get; set; } = ConnectionType.Long;        [ConfigParameter("超时时间ms")]       public int Timeout { get; set; } = 300;        [ConfigParameter("最小通讯周期ms")]       public uint MinPeriod { get; set; } = 3000;        #endregion        public SimTcpClient(Guid deviceId)       {           DeviceId = deviceId;       }         /// <summary>       /// 判断连接状态       /// </summary>       public bool IsConnected       {           get           {               //客户端对象不为空并且客户端已连接则返回true               return client != null && client.TcpClient.Connected;           }       }        /// <summary>       /// 进行连接       /// </summary>       /// <returns>连接是否成功</returns>       public bool Connect()       {           try           {               //进行连接               client = new SimpleTcpClient().Connect(IpAddress, Port);               client.DataReceived += Client_DataReceived;           }           catch (Exception)           {               return false;           }           return IsConnected;       }       /// <summary>       /// 收到服务端数据       /// </summary>       /// <param name="sender"></param>       /// <param name="e"></param>       private void Client_DataReceived(object? sender, Message e)       {           //如果收到的数据校验正确,则放在内存中           if (e.Data.Length == 8 && e.Data[0] == 0x08)               latestRcvData = e.Data;       }        /// <summary>       /// 断开连接       /// </summary>       /// <returns>断开是否成功</returns>       public bool Close()       {           try           {               client.DataReceived -= Client_DataReceived;               //断开连接               client?.Disconnect();               return !IsConnected;           }           catch (Exception)           {                return false;           }       }        /// <summary>       /// 释放       /// </summary>       public void Dispose()       {           try           {               //释放资源               client?.Dispose();           }           catch (Exception)           {            }       }        /// <summary>       /// 发送数据       /// </summary>       private byte[] sendCmd = new byte[4] { 0x01, 0x02, 0x03, 0x04 };        /// <summary>       /// 解析并返回       /// </summary>       /// <param name="ioarg">ioarg.Address为起始变量字节编号;ioarg.ValueType为类型</param>       /// <returns></returns>       [Method("读模拟设备数据", description: "读模拟设备数据,开始字节和长度")]       public DriverReturnValueModel Read(DriverAddressIoArgModel ioarg)       {           var ret = new DriverReturnValueModel { StatusType = VaribaleStatusTypeEnum.Good };           ushort startIndex;           //判断地址是否为整数           if (!ushort.TryParse(ioarg.Address, out startIndex))           {               ret.StatusType = VaribaleStatusTypeEnum.Bad;               ret.Message = "起始字节编号错误";               return ret;           }           //连接正常则进行读取           if (IsConnected)           {               try               {                   //发送请求                   client?.Write(sendCmd);                   //等待恢复,这里可以优化                   Thread.Sleep(Timeout);                   if (latestRcvData == null)                   {                       ret.StatusType = VaribaleStatusTypeEnum.Bad;                       ret.Message = "没有收到数据";                   }                   else                   {                       //解析数据,并返回                       switch (ioarg.ValueType)                       {                           case DataTypeEnum.UByte:                           case DataTypeEnum.Byte:                               ret.Value = latestRcvData[startIndex];                               break;                           case DataTypeEnum.Int16:                               var buffer16 = latestRcvData.Skip(startIndex).Take(2).ToArray();                               ret.Value = BitConverter.ToInt16(new byte[] { buffer16[0], buffer16[1] }, 0);                               break;                           case DataTypeEnum.Float:                               //拿到有用的数据                               var buffer32 = latestRcvData.Skip(startIndex).Take(4).ToArray();                               //大小端转换一下                               ret.Value = BitConverter.ToSingle(new byte[] { buffer32[3], buffer32[2], buffer32[1], buffer32[0] }, 0);                               break;                           default:                               break;                       }                   }                }               catch (Exception ex)               {                    ret.StatusType = VaribaleStatusTypeEnum.Bad;                   ret.Message = $"读取失败,{ex.Message}";               }           }           else           {               ret.StatusType = VaribaleStatusTypeEnum.Bad;               ret.Message = "连接失败";           }           return ret;       }         public async Task<RpcResponse> WriteAsync(string RequestId, string Method, DriverAddressIoArgModel Ioarg)       {           RpcResponse rpcResponse = new() { IsSuccess = false, Description = "设备驱动内未实现写入功能" };           return rpcResponse;       }   }    public enum ConnectionType   {       Long,       Short   } } 

注册驱动

  1. 生成DriverSimTcpClient 项目

    iotgatewayIoTGatewaybinDebugnet6.0driversnet6.0路径下可以看到生成了DriverSimTcpClient.dll

  2. 运行IoTGateway,访问本地518端口
  3. 添加驱动

    网关配置->驱动管理->添加
    驱动开发实战之TcpClient

:::warning 注意

添加驱动后需要重启一下项目,后面会优化
:::

创建设备

  1. 采集配置->设备维护->添加设备
    驱动开发实战之TcpClient

添加变量

  1. 采集配置->设备维护->添加设备

    手动添加或者通过excel批量导入下面变量

变量名 方法 地址 类型 表达式 设备名
运行状态 Read 1 uint8 模拟设备
设备温度 Read 2 float 模拟设备
电机转速 Read 6 int16 raw*0.01 模拟设备

开始采集

采集配置->设备维护->编辑设备
驱动开发实战之TcpClient

启动TcpServer

运行你熟悉的TCPServer测试工具,启动端口6666,网关客户端连接后发送响应报文
驱动开发实战之TcpClient

查看数据

驱动开发实战之TcpClient