Great Britain Companion Specification (GBCS)

Defines communication requirements, specifically for GB smart meters. It handles the requirements for communication between a) smart metering devices and b) the data and communications company (DCC) – the latter of which is essentially the head end system for all non-GB readers!

The protocol includes aspects of DLMS (and makes reference to the Green book/Blue book) and Zigbee Smart Energy, both of which we support.

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