这个真的不可多得好教程，系统的解释了RS232，以及如何用VB与其通信。即有基本概念又有丰富实例。还有例题。由于CSDN只允许传10M以下单个文件，所以第二部分请到我的空间里面下载。 VB与RS232通讯教程，需要两部分一起下载，才能看哦，记住哦，这个教程很好。详细讲述了RS232与VB通讯的原理，而且还有VB程序实例。还分别的讲述了VB与各种仪器通信的例子，还讲述了VB与PLC通信的例子。

适合展厅展馆内容播放，可以通过TCP/UDP/RS232控制视频的播放、停止、暂停、选择片源；控制PPT上一页、下一页；控制图片切换；打开指定的网址等

CM1241 RS232通信模块固件_版本V2.2.0

1.拷贝javacomm.jar到X:\jre\lib\ext目录下面; 2.拷贝javax.comm.properties到X:\jre\lib目录下面; 3.拷贝win32com.dll到X:\jre\bin目录下面;

Docklight Scripting is an extended edition of Docklight RS232 Terminal / RS232 Monitor. It features an easy-to-use scripting language, plus a built-in editor to create and run automated test jobs. A Docklight script allows you to execute all basic Docklight operations (sending predefined data sequences, detecting specific sequences within the incoming data stream, ...) and embed them in your own test code. Docklight Scripting is also network-enabled. Instead of using a serial COM port, Docklight Scripting can establish TCP connections (TCP client mode), accept a TCP connection on a local port (TCP server mode), or act as a UDP peer. Docklight Scripting gives you both flexibility and simplicity. Within minutes you can build your own automated testing tools and create: · time-controlled test jobs (e.g. sending a diagnostics command every 5 minutes and reporting an error, if the device response is not ok) · repeated test cycles (e.g. endurance testing for a motion control / drive system) · automatic device configuration scripts (e.g. resetting a RS232 device to factory defaults before delivery) · fault analysis tools for service and maintenance tasks (e.g. running a set of diagnostics commands and performing automatic fault analysis) · protocol testers with automatic checksum calculations (e.g. CRC - Cyclic Redundancy Codes) · Docklight startup scripts (e.g. automatically starting a COM port logging task at PC startup) Docklight Scripting uses the VBScript engine, allowing you to write your tests in a simple, well-known scripting language. Docklight's basic functions and features are made available through a small and convenient set of Docklight script commands.

《C/C++串口通信典型应用实例编程实践》从工程应用的角度出发，对目前流行的三种不同类型的C/C++语言（包括C++ Builder、Visual C++和LabWindows/CVI）开发串口通信（也称为串行通信）程序进行了阐述。基础篇简单介绍了C/C++语言实现串口通信需要的基本知识；应用篇通过PC与PC、PC与单片机、PC与智能仪器、PC与PLC、PC与GSM短信模块、PC与远程I/O模块等典型应用实例，详细介绍了C/C++语言利用MSComm控件、API函数实现串口通信的程序设计方法。每个实例的设计任务同时采用C++ Builder、Visual C++和Labgrmdows/CVI实现。 本资源为配套源代码。

可以连续的接受串口的数据，无需发送命令，给程序基于win32开发可以直接被其他程序使用。

C++实现 RS232通信类 已在MFC中测试 非常好用！

（1）按原理图连接好电路,其中8254计数器用于产生8251的发送和接收时钟，TXD和RXD连在一起。 （2）编程: 从键盘输入一个字符,将其封装成为数据帧后发送出去,并进行差错检测及奇偶校验，再接收回来在屏幕上显示，实现自发自收。

C++代码，学习前辈的，可以作为基本的上位机调试程序使用