Integrating MWD5 thermostat into Openhab

Hardware Home Automation
21

Hi @Christian_Kittel,

Thanks for your work on this. How did you found out the details of the API, is there any reference anywhere?

22

Hi @jammin,

There is no API documentation :persevere: I use reverse engineering to determine the API calls.

23

Thanks for the quick reply @Christian_Kittel

Did you do this with packet capture? I thought the communication was under https so that wouldn’t be possible?

Did this binding end up supporting two-way? In particular I want to be able to set the thermostat to eco mode or turn off when house is not occupied.

24

@Christian_Kittel Thank you for your work so far! I have 10 of these in my house, and with the varying energy prices in Norway (new price each hour) I need to control this in a smarter manner than what the app offers.

What is the status of 2-way comm? I tried to set the manual setpoint value via the cli interface, but nothing changed in the app.

25

Hi @seime

i will investigate that. What does the thermostat display show?

26

After investigation it works for me.

I wrote a little rule:

events.sendCommand('BathRoom_FloorRegulationMode', 'manual');
events.sendCommand('BadOJElectronicsOWD5MWD5Thermostat_ManualSetPointTemperature', '22');

The display of the thermostat and also the app show 22°C (in the thermostat not in the thermostats group).

27

OK, if 2-way really is implemented I will give it another try this evening!
I did not investigate it much as the forum messages indicated that it was not really implemented.

Thanks again for your great work!

28

By the way: You spoke about 10 thermostats in your house. Do you have one or more groups? Or do you control every thermostat individually?

29

In the (branded) app I am using (Microtemp) I can only start by adding zones (groups?), then thermostats. So all of them are connected to a zone, and all but 1 zone have 1 thermostat.

1 Like
30

How did you get the api key for the OJElectronis device?

31

I ran the app in an Android emulator and sent the network traffic via a local proxy server. There are multiple guides online on how to do this.

Regards

32

Hi @Christian_Kittel - So you created a driver?

33

It has been a while since anyone posted here, but I’m looking at getting an OJ Electronics thermostat to allow me to control my under-tile heating with openHAB. @Christian_Kittel does the binding now included in openHAB (4.0 Milestone) include the ability to write values to the mode and set-point as you described?

34

Hi @raaahbin ,

it should work. Some other users and i writing values to the thermostat e.g. mode and set-point values. So please try it and if you have any question please write it to this topic.

35

It’s working perfectly - thank you!

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36

I don’t know if I hijack this thread when posting this, but since the update to OH4.3 the cloud connection goes offline often. The log shows:

2024-12-27 16:23:15.825 [INFO ] [ronics.internal.common.SignalRLogger] - SignalR information message: Connection - Slow connection detected
2024-12-27 16:23:22.491 [INFO ] [ronics.internal.common.SignalRLogger] - SignalR information message: Connection - Timeout
2024-12-27 16:23:22.491 [INFO ] [ronics.internal.common.SignalRLogger] - SignalR information message: Connection - Disconnecting

For me it seems it is disconnecting too soon, while the reconnect succeeds immediately. I don’t know where to start debugging or changing settings. Does anyone have a clue?

37

Hi,

i see the same in my logs. I have also problems with the OJ Electronics App. It is a server issue. It is not related to the OH4.3.

38

Since 13:50 the logs looks much better. Could you please confirm?

39

I’ve checked my logs and indeed the problem isn’t showing anymore. Server issue indeed. Thanks Christian for your swift replies!

1 Like