The tools have not been bundled because of license restrictions. I can recommend the following tools to test the modbus implementation: - Modpoll Modbus® Polling Tool: A free command line based Modbus master simulator and test utility. available: http://www.focus-sw.com/fieldtalk/modpoll.html - Modbus Poll master simulator: A Modbus master simulator with a excellent user interface. Support RTU and ASCII modes. available: http://www.modbustools.com/modbus_poll.asp Simple download the Modpoll Polling Tool and place it with the name 'modpoll.exe' in this directory.