此程序用于单片机一对多通信,主机监视各冰箱的温度,共两个程序,一个主机,多台分机,采用485通讯.单片机使用89C51-This procedure for single-chip one-to-many communications, the host to monitor the temperature of the refrigerator, a total of two procedures, one host, multiple extensions, the use of 485.