MODBUS协议栈，最新V1.5.0版，2010-06-06发布，可方便移植到各类系统中去。

FreeMODBUS 是基于最新的标准并且与标准完全兼容，适用于嵌入式系统的Modbus通用协议栈，非常容易移植到其他的平台之上，构建稳定可靠的Modbus Slaver设备，目前版本为1.4.0。-FreeMODBUS is a free implementation of the popular Modbus protocol specially targeted for embedded systems. The implementation is based upon the most

最新开源Modbus协议栈，包括RTU和TCP功能。-libmodbus is a free software library to send/receive data with a device which respects the Modbus protocol. This library can use a serial port or an Ethernet connection.