The KNX (Konnex) system is a worldwide standard for home and building automation. It enables the control of lighting, blinds, heating, ventilation, air conditioning, security, and other functions in residential and commercial buildings. At the heart of KNX systems is the ETS (Engineering Tool Software), a powerful tool used for planning, configuring, and commissioning KNX installations. The ETS 4 Professional version is particularly sought after for its advanced features and capabilities.