DS18b20的温湿度控制， DS18b20的温湿度控制，

modbus协议全解，modicon公司编写的协议，很权威，很有参考价值。-modbus protocol the whole solution, modicon the company prepared an agreement, it is authoritative, useful reference value.

对基本调制解调进行了详细的阐述,包括BPSK,QPSK,16QAM,64QAM-The basic modulation and demodulation described in detail, including BPSK, QPSK, 16QAM, 64QAM

非常详细地介绍了GSM模块AT指令集的每条指令的功能，并附上例子。本文是全中文教程特别适合英文不是很好的初学者。-Very detailed description of the GSM module AT command set the function of each instruction, along with examples. This article is particularly suitable for the Chinese course English is not very good for beginners.

OFDM 4QAM simulation using Matlab

SortUtil simple的sort程序。-SortUtil simple procedure of the sort.

Windows CE 串口通讯程序，可用于Wince 4.0以上的版本，使用EVC++ 4.0编写-Windows CE serial communication procedures, can be used for Wince 4.0 or later, use EVC++ 4.0 preparation

详细介绍CDMA扩频通信原理，- In detail introduces the CDMA wide frequency correspondence principle,

modbus_tcpip.pdf 英文的基于tcpip的modbus通信-modbus_tcpip.pdf English modbus connection based on the communication tcpip

VC6请使用 LsCommDemo(for vc6).zip VC7请使用 LsCommDemo(for vc7).zip 作者：Liu_sir VC知识库 http://www.VCKBASE.com 多线程,多接收模式串口类LsComm相关文档 多线程,多接收模式串口类LsComm 作者:Liu_sir 所以参照Delphi中的SpComm设计了一个类CComPort,对CSerialPort进行了2次封装,主要目的是简化串口的使用.使其用简单的代码就可以完成串口通讯的过程.并提供了一个Demo程序演示了CComPort的使用 多线程，多接收模式串口类 LsComm 之二 作者:liu_sir 实现了一个简洁易用的多线程串行通讯接口,可以切换查询和自动接收模式,进行对串口数据收发-err

本文主要阐述了DTMF的原理及如何在MATLAB上产生DTMF信号，主要涉及到电话拨号音合成的基本原理及识别的主要方法，利用 MATLAB 软件以及 FFT 算法实现对电话通信系统中拨号音的合成与识别。并进一步利用 MATLAB 中的图形用户界面 GUI 制作简单直观的模拟界面。 能够利用矩阵不同的基频合成 0 － 9 不同按键的拨号音，并能够对不同的拨号音加以正确的识别，实现由拨号音解析出电话号码的过程，完成对电话拨号音系统的简单的实验仿真。-This paper described the principle and how DTMF in MATLAB to generate DTMF signals, mainly related to the telephone dial tone of the basic principles of synthesis and identification of the main methods, the use of MATLAB software and the FFT algorithm on the telephone communication system dial tone Synthesis and Recognition . And further the use of MATLAB in the production of graphical user interface simple and intuitive GUI interface simulation. Able to take advantage of matrix synthesis of different fundamental frequency 0- 9 different keys of the dial tone and be able to different dial tone to be the correct identification, the dial tone from a telephone number to resolve the process of completion of the telephone dial tone system, a simple experiment simulation