WebSockets

s2-ws-json is A WebSockets and JSON based protocol specification implementing the EN50491-12-2 "S2" standard for home and building energy management. This section describes more details surrounding the implentation.

As part of the S2 WebSockets Implementation a way for Resources to be able to discover each other and establish communication is necessary. We identified the following scenarios:

Cloud-cloud

Both an S2 resource (resource manager) and energy management system run in the cloud (for example communicating with the local device via a manufacturer specific protocol)

Cloud-local

A hybrid scenario where one of either the resource manager (an S2 resource) or the energy management system are running S2 locally and the other is running in the cloud

Local-local

A local LAN scenario where both S2 resource and energy management system are running on the same local network.