用单片机C语言编程实现4台单片机之间的多机通信，有完整的Protues仿真源代码。,C programming language used to achieve single-chip 4 between the single-chip multi-machine communications, complete source code Protues simulation.

用51单片机实现MODBUS协议，包话主从模块的通讯PROTUES仿真和原代码，可以自行学习-With 51 single-chip realization of MODBUS protocol, packet words master-slave communication module and PROTUES simulation source code