Modbus protocol
Modbus is an one of communication protocols used in automation systems. Modbus is royality-free and simple to implementation industrial communication protocol. On this site we are focused on two main Modbus implementation : Modbus RTU (over RS485 serial line) and Modbus TCP (over TCP/IP network).

Legal notice : All modbus projects shown on this site are free only for non-commercial use. Commercial use without written permission is not allowed.

Modbus Library
  Modbus slave library

Modbus projects
  Test board for Modbus RTU
  Modbus TCP to RTU gateway

Modbus software
  Modbus Master Simulator - utility for testing slave devices
  Modbus Bootloader for AVR - utility for updating modbus devices firmware

Modbus articles
  Modbus RTU slave library implementation on AVR microcontroller
  Modbus TCP slave library implementatin on AVR and Ethernut