采用了AT89C2051单片机作为中央处理芯片，使得该系统的功能扩展比较方便，对于整个系统如需改变某种设置，只要更改相应的软件即可-AT89C2051 used as a central processing chip, make the system more convenient function expansion for the entire system need to change some setting up, as long as the software changes ca