[KNX] What is the difference between KNX1, KNX2 and KNX3? Only KNX2 is available and recommended for new designs. KNX1 is obsolete, and KNX3 is a future product. Last Update: August 8, 2017 January 11, 2017 2256 KNX Q&A Related Knowledge Base Posts -[KNX] I wonder if the KNX-RF radiomodule can recive Z-wave 868Mhz?[KNX] 1- What frequencies you are using?[KNX] Is it full control?