I wonder about the choice of MQTT for local access. It has the disadvantage of excluding anyone without a MQTT server.

Might it not be more useful to provide an API - or even a very simple http(s) interface? That way, anyone with access to the local network could query the CAD. An Android/iPhone App could be developed - maybe by a third party.

The ideal would of course be both facilities; but doubtless the CAD is short on program memory.

I'd be interested in others' views..


  • Installing a MQTT broker is trivial. It's also a lot easier to get the data you want than an API.

  • Most people who would be buying these would be feeding into some form of home automation system using MQTT. If you have a smart meter you can access the data using the Bright app so you don't need the the IHD/CAD to access that.

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