基于51单片机的串口程序，采用标准的modbus协议，其中包括CRC校验等-Based on 51 single-chip serial procedures, using standard modbus protocol, including CRC checksum, etc.

实现51单片机Modbus通信，包含协议以及源程序。编程软件为keil(Achieve 51 singlechip Modbus communication, including protocols and source code. The programming software is keil)