MWD5 WiFi thermostat (OJ Electronics/Microtemp)

[barryp (Barry)]

Answered my own question (after contacting OJ Electronics Support), seems that when using the OWD5 App (instead of SWATT) the Customer ID is 1 (instead of 99),

So it works using the default Host Name.

Hopefully this is useful for anyone in the same position.

[f_rele]

Has anyone gotten nice steady readings from the thermostat?

All the data since installation has been like this. I have now netwatch in place in my router to ping the thermostat and ocd5.azurewebsites.net to see if there is a pattern in link downs related to cut graph data.

[Janannie (Kenneth)]

Hi Robbin,
I too use the SWATT app with the MWD5 thermostats on android however, I’m only new to HA and are still setting up my devices. could you please send the API and any info you could provide that may help? Thank you in anticipation for your reply.

[AnthonyBe]

@batts

Hi all. I have just stumbled onto “OJ Microline Thermostat” integration in HACS. I am running the Australian version of the MWD5 (Thermotouch WiFi 5235W).

I accepted the default host and user id parameters, and filled the API key from post 72

f219aab4-9ac0-4343-8422-b72203e2fac9

and added my user name and password from the app.

It loaded immediately and at first look, most, if not all, entities are available. EDIT: interactions seem okay, next project is to look at automations.

Batts

I found that worked for me as well (also in Australia). A little unintuitive that we ignore the Customer ID we use in the SWATT app (ID = 23)

Now that I have it up and running, as had been asked by others on this thread, it would be awesome to get the power consumption data.

[afrayedknot (Laurence)]

So for this integration - I want to control the “on/off” status of this via node red.

To turn the underfloor heating to “off” - do I just set the target temp to 1c or something, and to turn it “on” I set my desired temp?

I dont seem to see any toggle on/off options on the integration?

[B-moose]

Thanks for this integration. I’ve set it up as above and overall it works well.

However one issue is it doesn’t display the scheduled heating mode correctly. It shows the scheduled increase in set point at the wrong time of day, and doesn’t update the set point up to heating occurring when it’s on, despite the thermostat showing the correct temp (see screenshots). Anyone seen similar behaviour or a way to fix it?

[patricknitsch]

Hi there,

your post is was a few month ago, but the payload_template works now

That’s my config. I tested it an I get the correct values

    payload_template: >
        {% set Date = (now().strftime("%Y-%m-%d")) %}
        {% set payload = {"APIKEY": "f219aab4-9ac0-4343-8422-b72203e2fac9","DateTime": Date,"History": 0,"ThermostatID": "1021410","ViewType": 2} %}
        {{ payload | to_json }}

[lubo7676 (lubo)]

Hi guys, Im trying use hacs from robbin, but its not working.

https://rhgsj73mq5aqghmx3g3zugwcytpmxc99.ui.nabu.casa/hacs/repository/582143144

I got OWM5

[da.pe]

Hi B-moose, same issue here. Really strange.

[paglatz (Patrick)]

Hi guys,

i wanted to setup this integration but am struggeling with userid, password and api key.
I was one of the first users at openHAB using the integration their and received an api key back in 2020 directly from Christian Kittel. But i don’t know how i got the username and password. The integration is still running under openHAB and also on the app on the iPhone. But i can’t get it to work with this integration. It always says: wrong userid / password.

Has anybody any hints, how i can set up this integration?

Thanks
Patrick

Edit: Just found the information which was missing in this thread:

Connecting OJ Microline Floor Heat Thermostat

Today I’m so happy after such a long time fighting to get the OJ Microline OWD5 thermostat really a smart device… I want to share the way it works now. Thank you @blackshoals and @oppigard and ofcourse @robbinjanssen for the HACS Integration! Downloaded the ‘OJ Microline thermostat’ HACS integration. Read the Customer ID from the thermostat information panel(in OWD5 Apple App) Copied the API key from #oppigard’s post 'WMD5 Wifi Thermostat Clicked the “Add integration to My…” from the integrat…

There it was the hint, to read the CustomerID from the App.

And the API key is the same i had back in 2020 and which was referenced from @oppigard

MWD5 WiFi thermostat (OJ Electronics/Microtemp)

I’ve had the Microtemp MWD5 WiFi thermostat for a couple of years, and a while back I successfully sniffed the communication between the mobile app and the cloud. It communicates with HTTP POST/GET with json data, and seems simple to create an integration for it. Is there a similar thermostat integration that would be easier to modify than start from scratch? I’ve postponed this task for almost a year now, so if anyone else wants to have a go, use my notes below. The main priority is to contr…

But i don’t remember, where i got the username and password from. Could anybody give a hint here, so that we have it for reference?

Thanks
Patrick

[Floriszz (Florisz)]

I tried identity.mythermostat.info. But it asks for an email address as as username, which I don’t have.
So I used the username and password I created when linking the app of my iPhone/android to the thermostat. If you forgot, you can remove the device from the thermostat from it’s display menu and relink the app again

[paglatz (Patrick)]

Thanks, that helps a lot. Summing up:

1. Note down the API Key referenced in post 1 in this thread by @oppigard: MWD5 WiFi thermostat (OJ Electronics/Microtemp)
2. Download the app from the App-Store, create an account by entering a username and a password. Note down username and password
3. In the app, add/connect your thermostat
4. In the app, identify your customer id
   Menu > Thermostat data > [Thermostat Name] > Customer ID
   (mine was “1”)
5. Install the plugin using HACS
6. Create an oj electronics integration and refer your OWD5 app username and password, the global API key and your customer id

That worked for me now.

Thanks
Patrick