AT89C52实现单片机控制GSM模块的短信收发程序源代码。在keil下调试成功，并且在对短信的接受上做了处理，取出了接受短信的内容。-AT89C52 microcontroller to control the GSM module messaging program source code. Debugging in keil, processing and acceptance of the SMS, remove to accept the message content.

基于AT89C52的伺服电机调速控制驱动程序,可以控制伺服电机按ＸＹ方向移位。-Based on AT89C52 servo motor speed control driver, you can control the servo motor to shift the direction of the XY.