Quick update on this:
It turns out the Glow CAD cannot work offline. The API that Hildebrand make available is purely for getting the data back out after they have stored it. This means that it can’t work without an internet connection, and most importantly it will become a brick if/when they cease to support the services. That’s a deal breaker. I just want an Ethernet-Zigbee bridge device that lets me access the realtime data.
What are the chances of Hildebrand dropping the services? Well they currently run energyhive. They are no longer promoting or selling energyhive-compatible hardware, or making improvements to the existing services. They are shifting from energyhive to their new ecosystem called Glow. How long will it be before they decide Glow needs to be deprecated for another new ecosystem?
Not only that, but the web dashboard that is mentioned on the CAD page of the Glow shop, linked above, is still under development. Odd they don’t mention that in the sales blurb before you purchase isn’t it? The new app is called “Bright” and can apparently be found on the Play store, but they couldn’t be bothered to give me a direct link. I wonder if any of them have ever tried searching for “Glow” or “Bright” on the Play store? Go on. Give it a try. I’ll wait. Did you find it? Because it beats me.
With a bit of luck the Open Energy Monitor people will be able to get something working before long. I’ve used Zigbee before and it’s simple enough. The only real difficulty is getting a device certified to be allowed on the HAN.