N-Button creates buttons or widgets that float on your desktop to control external devices, send specified data, run applications, send http requests or send data lists. It supports Serial Port/ USB and Network connection between a PC and devices.
N-Button makes it possible to control relay controller boards of National Control Devices without any programming!
This video shows how to create buttons to control relay board.
FREE download nbc file shown in the video to load in N-Button directly!
Create Buttons to Control Relay Board Step by Step