[SmartThings] OAuth integration fails after 24h – 401 Unauthorized on device command (HA 2025.6 + Nabu Casa)

[matteoopc]

The problem

After installing the SmartThings integration using OAuth2 (no PAT), everything works at first. But after ~24h, all automations and service calls fail with 401 Unauthorized.

This happens on Home Assistant 2025.6 with Nabu Casa active. No webhook or token errors are shown in the logs.

What version of Home Assistant Core has the issue?

2025.6

What was the last working version of Home Assistant Core?

None — bug persists across fresh installs with OAuth

What type of installation are you running?

Home Assistant OS (via Nabu Casa)

Integration causing the issue

SmartThings

Link to integration documentation on our website

https://www.home-assistant.io/integrations/smartthings/

Example YAML snippet

# automation or service calls fail on any device after ~24h
- service: switch.turn_off
  target:
    entity_id: switch.condizionatore_cucina

### What version of Home Assistant Core has the issue?

core-2025.6.1

### What was the last working version of Home Assistant Core?

_No response_

### What type of installation are you running?

Home Assistant Supervised

### Integration causing the issue

Smartthings

### Link to integration documentation on our website

_No response_

### Diagnostics information

_No response_

### Example YAML snippet

```yaml

Anything in the logs that might be useful for us?

Error executing script. Unexpected error for device at pos 1: 401, message='Unauthorized', url='https://api.smartthings.com/v1/devices/<device_id>/commands'

Additional information

No response

[home-assistant]

Hey there @joostlek, mind taking a look at this issue as it has been labeled with an integration (smartthings) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of smartthings can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign smartthings Removes the current integration label and assignees on the issue, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the issue.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the issue.

_{^{(message by CodeOwnersMention)}}

---

smartthings documentation
smartthings source
_{^{(message by IssueLinks)}}

[joostlek]

Do you have 2 instances of home assistant running?

[matteoopc]

Do you have 2 instances of home assistant running?

Hi, just to clarify:

👉 I do not have two Home Assistant instances.
I only run a single HA installation, and I’m using it with Nabu Casa active.

There is no secondary system or duplication involved.
The issue with the SmartThings integration (401 Unauthorized after ~24h) happens consistently on this single instance.

Thanks!

[joostlek]

Can you download diagnostics?

[matteoopc]

Can you download diagnostics?

Hi @joostlek and team, just a quick update:

I’ve looked thoroughly inside Home Assistant (2025.6 / Nabu Casa, SmartThings integration page and device page), but I don’t see any option like “Download diagnostics” under the three-dots menu ⋮.

Let me know if I should check somewhere specific or provide logs manually.

[J-o-h-n-M]

I have the same issue, every day i get this message. And i have to reauthenticate

(i left this for a few days, that is prob why it says last week, i only have a Fridge and Soundbar connected which are not a priority for me to have active in HA)

hmm, i looked in diagnostics and saw that I also had this:

"smartthings_soundbar": {
      "documentation": "https://github.com/PiotrMachowski/Home-Assistant-custom-components-SmartThings-Soundbar",
      "version": "v1.0.6",
      "requirements": []
    },

perhaps these 2 integrations are clashing. I have removed this soundbar one now, so i will update if the issue persists.

[joostlek]

@matteoopc i am suspecting you're running a custom component, because you should be able to see that button

[Fatalmose]

Yes indeed…
Same problème…
I have to recharge the Samsung integration every day since latest HA update…

[obest]

Yes indeed… Same problème… I have to recharge the Samsung integration every day since latest HA update…

Me too. Sometimes more than once a day…

[matteoopc]

@matteoopc i am suspecting you're running a custom component, because you should be able to see that button

Hi, thanks for the follow-up!

You're right — I just realized I did have a custom component installed:

I’ve now completely removed it from my setup (including from custom_components/), and restarted Home Assistant to ensure it's clean.

I’ll monitor the SmartThings integration over the next 24+ hours and report back to confirm whether the issue persists or if that component was indeed interfering.

Thanks again for pointing it out!

[J-o-h-n-M]

just to update, since i removed the other smartthings_soundbar integration, i have not had any authentication request anymore in the last 3 days.

[matteoopc]

@matteoopc i am suspecting you're running a custom component, because you should be able to see that button

Just a quick update:

I removed the custom integration I had previously installed , and since then everything has been working normally.

It’s been a few days now, and I haven’t had any more issues — no more 401 Unauthorized errors, and no need to reauthenticate.

Looks like the custom component was interfering with the official SmartThings integration.

[Fatalmose]

I checked my custom component. Don’t have any Smartthings running in there. Problem still remaining untill now… Le mer. 25 juin 2025 à 11:46, matteoopc ***@***.***> a écrit :

…

*matteoopc* left a comment (home-assistant/core#147263) <#147263 (comment)> @matteoopc <https://github.com/matteoopc> i am suspecting you're running a custom component, because you should be able to see that button Just a quick update: I removed the custom integration I had previously installed , and since then everything has been working normally. It’s been a few days now, and I haven’t had any more issues — no more 401 Unauthorized errors, and no need to reauthenticate. Looks like the custom component was interfering with the official SmartThings integration. — Reply to this email directly, view it on GitHub <#147263 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BGEH4FW7XD62WGBW3ZUI5ND3FJVWNAVCNFSM6AAAAAB72CU242VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTAMBUGEZTEMRQGU> . You are receiving this because you commented.Message ID: ***@***.***>