MBUS协议 The bus communication system of EN1434-3 is commonly called M-Bus. Its application layer describes a standard especially for meter readout. It can be used with various physical layers and with link layers and network layers which supp

这是一个51单片机的菜单设计例程，使用时要做一些修改-This is a menu of 51 single-chip design examples, used to do some modifications

51MCU 3层吊兰（电梯）程序，通过并口采集数据-51MCU 3 layers of Chlorophytum (elevator) program, collecting data through the parallel port