This thesis focuses on the explanation of the KNX automation systems, the benefits of the mentioned systems in comparison with classic electrical installations and the upgrade of the systems with the Control4 platform. Compared to classic electrical installations KNX systems are present- day energy efficient advanced systems, which offer various functions that classic electircal installations cannot. KNX systems work on the principle of busbar installation, which means that all KNX system elements are connected through busbar wire that is made through special KNX cable. KNX elements mutually communicate through the busbar line in a form of a telegram. Key KNX system elements for normal functioning are: actuators, various sensors, KNX power supply, IP router, etc. Programming, parameterization and other program works are performed through ETS software. The mentioned software is available in various versions depending on the complexity of the objective which KNX system has to execute. The only disadvantage of the KNX system is that the inital cost of the entire system is higher than the installation of the classic electrical installations. The KNX system can be upgraded via the Control4 platform for easier and clearer management as well as due to the possibility of higher level multimedia managment which is not offered by KNX system. In the last chapter of the thesis is an example of apartment automation via the KNX system and Control4 platform, which is made to minutely explain the process of installing a system of that type.