KNX home automation system
Introduction
KNX is a standard (ISO/IEC 14543) network communications protocol, based on OSI, for intelligent buildings (home and building automation). KNX is the successor and convergence of three previous standards: the European Home Systems Protocol (EHS), the European Installation Bus (EIB or Instabus) and the BatiBUS belonging, respectively, to the EHSA (European Home Systems Association), the EIBA (European Installation Bus Association) and the BCI (BatiBUS Club International).[1] The KNX standard is managed by the KNX Association.
Until January 2016, the text of the KNX specification had to be acquired upon payment of a fee.[2] Since then, the specification can be acquired without any charge assuming that the user has a free account registered on the KNX Association website.[3].
History
The specifications before KNX appeared in the early 90s with Batibus, EIB and EHS. These three solutions for the control of homes and buildings in Europe initially tried to develop their markets separately, trying to make a place for themselves in European standardization. Batibus did especially well in France, Italy and Spain, while EIB did particularly well in German-speaking countries and northern Europe. For its part, EHS was the preferred solution for manufacturers of white and brown products.
In 1997 these three consortia decided to join forces with the stated objective of jointly developing the smart home market, agreeing to create a common industrial standard that could also be proposed as an international standard. The KNX specification was published in spring 2002 by the newly established KNX Association"), slowly managing to penetrate a reticent market such as construction despite the fact that it is a very robust and reliable system.[4].
Protocol
Contenido
La especificación está basada en la pila de comunicación de EIB completada con los mecanismos de configuración, medios físicos y experiencia de aplicación originalmente desarrollados por Batibus y EHS.[5].
KNX define varios medios de comunicación física:[6].