51单片机 典型的modbus通许协议！Modbus协议；串行通信；LRC校验；CRC校验；RS-232C，对于初学者有很大帮助！

STM32彩屏显示AD采集数据并通过RS485接口与主站MODBUS通讯

The objective of this document is to present the MODBUS messaging service over TCP/IP , in order to provide reference information that helps software developers to implement this service. The encoding of the MODBUS function codes is not described in this document, for this information please read the MODBUS Application Protocol Specification [1]. This document gives accurate and comprehensive description of a MODBUS messaging service implementation. Its purpose is to facilitate the interoperability between the devices using the MODBUS messaging service. This document comprises mainly three parts: • An overview of the MODBUS over TCP/IP protocol • A functional description of a MODBUS client, server and gateway implementation. • An implementation guideline that proposes the object model of an MODBUS implementation example.

AB plc sm2 modbus模块手册

基于FPGA实现Modbus通讯协议基于FPGA实现Modbus通讯协议基于FPGA实现Modbus通讯协议基于FPGA实现Modbus通讯协议基于FPGA实现Modbus通讯协议

提供格力中央空调RS-485控制协议，用于第三方控制系统控制中央空调

详细讲解了用欧姆龙协议宏与3G3MV变频器的modbus通讯，

实现功能： 运用串口发送指令（MODBUS协议）控制芯片STM32F103C8T6产生PWM波，从而控制86步进电机的运动和停止，本程序添加不同频率PWM波，进而可以控制86步进电机的运动速度。

基于labview 和 modbus协议做的一个小设计，用于数据采集，可以采集温度，燃气量等等，仅供学习

用的modbus协议进行的温湿度数据采集，其中数据的SerialPort的属性需要自己去定义