Changes

In order to “smartify” the situation, communication must be enabled. Therefore an communication interface needs to be added to the smart-meter. Furthermore a smart-meter-gateway ('''SMGW''') needs to be added and accessible from the meters communication interface. These two devices can now communicate and are called in Germany an intelligent measuring system or '''iMSys''' - and yes, this communication is already protected (encrypted). The protocol used here is a COSEM (Companion Specification for Energy Metering) / OBIS (Object Identification System) / OMS (Operation Management System) protocol based on RS485 which can be either by wire or wireless, defined in [https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen/TechnischeRichtlinien/TR03109/TR-03109-1_Detailspezifikation.pdf?__blob=publicationFile&v=4 TR-03109]. It also contains a [https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen/TechnischeRichtlinien/TR03109/TR-03109-2-Anforderungen_an_die_Funktionalitaet.pdf?__blob=publicationFile&v=3 security module], which is used to controll the meters PKI function.