Introduction - If you have any usage issues, please Google them yourself
FreeMODBUS is common Modbus protocol stack for embedded systems applications in an implementation. Modbus protocol is an area in the industrial manufacturing of a widely used network protocol. A Modbus communication protocol stack including the two: the definition of a data structure and function of Modbus Application Protocol and network layer. In FreeMODBUS current version, provides a Modbus Application Protocol v1.1a implementation and support for Modbus over serial line specification 1.0 as defined in RTU/ASCII transfer mode. Starting from the 0.7 version, FreeModbus also supports TCP defined in Modbus Messaging on TCP/IP Implementation Guide v1.0a defined in the TCP transmission. Freemodbus follow the BSD [1], which means that the protocol stack implementation of the code can be used for commercial purposes.