本程序，通过ATmega88 AVR单片机的运行实现modbus的基础运行代码，运用串行口输出，连接多个设备，由总线地址区分各个运行设备和数据、指令的传输，可以在本程序的基础上进行完善令牌机制。(This program, through the ATmega88 AVR SCM to achieve MODBUS based operation code, the use of serial port output, connecting multiple devices, each operation of the equipment and data transmission between the instructions, by bus address, can improve the token mechanism based on the procedure of the.)