通过串口发送at指令 等待返回值判断当前的网络状况以及服务商等有关信息 用与gprs的通信...

串口通讯在客户端/服务器类型的应用程序设计中经常要使用到，目前串口通讯采用的一般是专用软件包或者标准串口通讯协议(如XMODEM、ZMODEM等)，这样完整详细且免费的软件包比较少，所以在SPCOMM的基础之上建立了本文所描述的串口通讯协议，称之为RCC(表示为Reliable Comm Communication)，其主要目标是在用串口进行通讯的客户端/服务器双方建立一条可靠的通讯链路，就象TCP(RFC793)一样。该协议的目前的开发是采用VC++，应用平台为WIN95/NT，但作为RCC协议的本身不受具体编程语言及操作系统所限制-Serial port communication in client/server type of application design often use to the current serial communication is generally used in special packages or a standard serial communication protocols (such as XMODEM, ZMODEM, etc.), such a complete package details and free more less so on the basis of established SPCOMM described in this article serial communication protocol, called RCC (expressed as a Reliable Comm Communication), whose main objective is to communicate with the serial port client/server sides to establish a reliable communication link, like TCP (RFC793) the same. The current development of the protocol is used VC++, application platform for WIN95/NT, but as the agreement itself, RCC concrete programming

Delphi串口通信控件-支持4个端口-Delphi serial communication control-support four ports

Advantech设计的外板预警系统。通过这个可以测出部分板卡的错误信息-Advantech designed plate early warning system. Through this part can detect the wrong message board

这个是8253芯片的两个实例程序，对学习接口的人是有一定帮助的-this is the 8253 case of two procedures, to learn the interface are certainly helpful

串口通讯开发文档资料，四个word文档，详细描述如何串口开发-VC_COMM content

CK6150数控车，西门子802SC梯形图源程序。-CK6150 NC Lathe, Siemens 802SC source ladder.

C++Builder对串行口进行读写操作的一个通讯类-C serial port and write a communications

通过串口与IC设备进行数据交互传输，实现IC卡餐饮收费系统。-through the serial port and IC equipment interactive data transmission, Food IC card system.

一个VB语言编写的，用计算机COM口进行数据传输的程序。-a VB language, computer COM port for data transfer procedures.

介绍了在visual c++开发环境下如何实现串口通信的操作-Introduced in the visual c++ Development environment how to achieve the operation of serial communication