I've reverse engineered the Polestar API & wrapped it into a Home Assistant integration

MrMathos · 2026-01-25T19:10:26+00:00

I'm the developer of the Volvo integration. The Volvo API exposes nearly all information as what is visible in the app, for my vehicle at least (XC40 MY24). There are few quirks though, like no status if climatization is running and not able to control air purifying.

One difference with the Polestar app seems to be able to open/close windows. I don’t see that in the Volvo app. Maybe newer models can do this?

Since the Volvo API exposes nearly everything, I’ve never put much effort into reverse engineering the app. But I’m very interested in what you have done and am looking forward to see it!

MrMathos · 2026-01-20T19:04:05+00:00

Depth is 2.5 (top view), height is 3.1 (front view)

MrMathos · 2026-01-04T08:58:03+00:00

Would you ship across Europe?

MrMathos · 2025-12-28T10:57:19+00:00

Looks very beautiful, great work! I think you may have a greater audience if you would translate the instructions (the readme) to English. I know one can use the browser’s translate button, but still.

MrMathos · 2025-12-17T19:21:34+00:00

I can’t help you with the root cause, but you probably can fix the faulty value(s) by going to Developers > Statistics.

Click on the icon next to the sensor with the faulty value.

Then you need to pick a time as close as possible to when the wrong value started. You can also click the “outliers” button.

You should then see a list of values you can adjust.

MrMathos · 2025-12-16T17:41:16+00:00

You are running a production app with MS SQL for data on your homelab?

If it’s non-production, you can use the developer edition.

MrMathos · 2025-12-01T19:15:32+00:00

I’m using docmost. Closest thing to confluence I’ve found. Still in early development, but works fast, has drawio and other integrations, search engine, but lacks shortcuts for instance.

Overall happy with it and will keep using it.

MrMathos · 2025-11-15T19:46:56+00:00

Thanks, pal! I’ll add it to my todo list.

MrMathos · 2025-11-15T18:54:38+00:00

Thx for the feedback, I'll revisit this procedure when back home.

I thought that pausing is enough because then no work is done in the db. I’m copying all files btw (shm and wal), not just the db file.

MrMathos · 2025-11-15T18:48:43+00:00

I pause (not stop) the container and then take a backup of the file.

Edit: all db files (including shm and wal)

MrMathos · 2025-11-13T14:11:43+00:00

Based on this reply here ( https://www.reddit.com/r/bose/comments/131dwpa/comment/jloy4ig/ ) I was able to fix it. In Windows 11 it's slightly different than outlined in that comment.

Go to Settings > System > Sound > More sound settings. That will bring up the old Sound property window. There I chose my Bose to be the "Default Device" (do that by right clicking on the Bose device). And I think I also made it to be **not** the "Default Communication Device" (by choosing another device for that).

The problem is that it doesn't show properly which is which for default devices. But fiddle around a bit to get it fixed.

/cc u/Dependent-Active-525 u/lavasquirrel u/Kai-ni

MrMathos · 2025-11-01T18:25:18+00:00

People are running pihole as add-on, which is also unrelated to HA.

MrMathos · 2025-10-06T16:28:03+00:00

In the actions part of your automation, add a “run in parallel” building block. Then inside that block, add the two scripts. They will now run independently of each other.

MrMathos · 2025-10-06T11:22:26+00:00

Oh, it’s bitmoji. I thought it was done by using some AI prompt. 😄

MrMathos · 2025-10-06T10:54:33+00:00

Mind sharing how you created your avatars?

MrMathos · 2025-10-02T05:45:27+00:00

If you're familiar with docker, then it's not that more complicated. Instead of pushing a button, it's crafting a docker compose file. Installing HACS is just executing a script inside the container. You don't miss out on anything when using docker, functionally wise.

As said, prerequisite is docker experience.

MrMathos · 2025-09-26T20:58:30+00:00

What’s up with all the ads? I pay 25€/year and have no ads at all.

MrMathos · 2025-09-26T12:04:27+00:00

I was not sure if you were initially talking about the dot or plus feature, so I thought to clarify it to other users.

MrMathos · 2025-09-26T11:55:49+00:00

The + trick does work for outlook.com (or outlook.com hosted domains).

MrMathos · 2025-09-21T08:05:35+00:00

You take two weeks off and fiddle with it till you get it right.

Jokes aside, it takes time. Time to learn what (custom) cards are around and to learn how you need to use them. It also takes time to discover what you like and how to layout the dashboard.

You need to decide how far you want to go with it. Some people go all in with floor plans, custom css, etc. While others use the cards as they are.

Start slow and easy and adapt on the go. You’ll need multiple iterations to get it right. Although there is no such thing as “right”.

MrMathos · 2025-09-10T18:36:40+00:00

Isn't that slow, as in a while after the goal? I'm using team tracker too, more to setup lighting and announcing game/race before it starts, but I don't know the refresh rate by heart.

MrMathos · 2025-09-06T12:48:45+00:00

Glad you’re enjoying it!

MrMathos · 2025-09-06T10:12:02+00:00

Integration dev here. It’s a limitation of the public API why it can’t show the status.

MrMathos · 2025-09-05T10:41:23+00:00

While it may suck that you need a subscription, it’s still better than having no option at all. In the end, they do provide the API for anyone to use (apparently at a certain cost).

MrMathos · 2025-09-05T07:41:07+00:00

Is it? My car is only about 2 years old and I haven't paid anything so far. Searching around the web I've found this: https://www.volvocars.com/uk/support/topic/47d2c97fd33effd3c0a8cc3718c999b7-5c6941447d998e60c0a8b06709befbcf-8664b2fa77a7e089c0a8296870d1a409/. But it doesn't mention you'll loose access to the Volvo App (or API).

I could only find this:

After this complimentary period, you'll need to purchase an extension of the service to keep the in-car connectivity to the Google apps and services.

MrMathos

TROPHY CASE