DEVIReg Smart thermostat binding

Kimzer · November 16, 2019, 8:55am

Awesome!!

Sonic · November 16, 2019, 1:05pm

So far, current tasks are:

Clean up the API, add state notifications callbacks
Normal main loop with events etc, current one is a quick crappy hack
Implement pairing by OTP. Required for receiving configuration from the phone.
Write a binding using the library
Testing against other products, like LivingConnect

Help is desperately needed.

Sonic · November 17, 2019, 2:52pm

(1) largely solved by now, (2) is in progress, currently for Windows only. I like VisualStudio.

morten235 · November 17, 2019, 4:33pm

Great job! I would love to help out but I only own a single Danfoss thermostat (since I discovered that zwave was no longer possible) and no Living Connect controller.

Sonic · November 21, 2019, 6:44am

Implemented (1) and (2) and back to reverse engineering. Dealing with pairing now. And UNIX version is up and running again.

Sonic · November 23, 2019, 5:42am

Pairing is almost done. Connecting and establishing the link successfully, but there is one more step required for the peer to accept me and start data exchange; it’s some challenge-response crypto mumbo jumbo. And i have almost understood it from the disassembly.

Kimzer · November 26, 2019, 5:21am

Great job! Looking forward to testing this

Sonic · November 26, 2019, 6:08am

I’ll make it soon. Yesterday (or today at 1:40AM the authentication reported success Now need to add configuration receive code from my old testapp to test it all together.
Then there will be some more polishing like adding missing PING packet, so that the grid doesn’t drop me because of inactivity.

Sonic · November 27, 2019, 6:05am

The first fully working version is on github. Successfully pairs and downloads the configuration.
At the moment the only application for this library is a small crudely hacked up testapp. This or next week i need to set up OH development environment and try to do something like a binding
And library API needs some polishing, plus there’s no ping yet, the grid times out.

Sonic · November 29, 2019, 5:01pm

Cleaned up API and fixed some (major) bugs. Ping is the only remaining thing

Sonic · December 1, 2019, 12:30pm

The library has finally reached v1.0.
At this point i am stopping playing with the test app. Set up Eclipse and will start my binding next week.

Udo_Hartmann · December 2, 2019, 4:18pm

Sounds promising

Kimzer · December 11, 2019, 7:36pm

How is it going? Super excited for this!

Sonic · December 12, 2019, 6:09am

Hi! A bit slow, christmas is coming, it’s a party week now.
Wrote some skeleton in Java and fighting with embedding my library in a Java project. I don’t have too much experience with Java; used it mostly on Android, Maven build system and OSGI are totally alien for me.
Fortunately i can look at how rfxcom binding is made, they also have native code.

Sonic · December 17, 2019, 10:46pm

Today is the official birthday of the new binding. It went ONLINE.
With “stolen” keys, however. Configuration sharing process is difficult to integrate into OpenHAB, will do something later.

Kimzer · December 19, 2019, 5:58pm

Niceeeeeee. Is there anything to test yet?

Sonic · December 19, 2019, 9:08pm

Not yet, after the NY i guess. Coming close to that, implementing the first set of channels right now. Flying to London on saturday for vacation till 30th December, so there will be a pause.

Udo_Hartmann · December 19, 2019, 10:46pm

Have nice vacation! Can’t wait to see a DEVIreg binding (we’re on our way to London in January…)

Sonic · January 3, 2020, 10:14pm

Yeah, London is great!
So i’m back to the development now and i’ve got something running and successfully controlling my thermostat. I even plan to deploy it on my 2.4 live installation to see how it’s going in production.
But, i guess, i need to do some stability fixups before. Currently if connection fails for whatever reason the binding won’t go back ONLINE automatically once the link has been restored.
Unfortunately it’s not ready yet for public testing because setting up is quite nontrivial. You need to use some external tool (currently i use my OpenSDG testapp) in order to “hijack” all keys from your phone. It’s impossible to connect to the device directly from scratch.
Working on integrating this into openhab, but this is not trivial because OpenHAB currently does not implement “parametrized” device discovery. I’ll have to use an external tool anyways.

Sonic · January 9, 2020, 6:09am

It has been a productive new year holiday.The binding is online and successfully deployed on my installation. After some bugfixing it all seems to be good.
Now i’ll be working on some external tool to facilitate configuration download from the phone, after which i’ll open up a public testing.