home-assistant/home-assistant.io

Update config steps for Nest to match current GCP setup

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#38,367 opened on Apr 4, 2025

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good first issuehelp-wantedintegration: google_pubsubintegration: nest

Description

Feedback

Hi

I am new to both github and HA so I hope the below makes sense!

I have just run through the workflow to add my Nest thermostat to Home Assistant. The documentation looks good but slightly outdated. Not sure if this is due to GCP updates changing the process slightly.

1.) Adding the pub/sub Publisher permissions isn't possible when adding a new principal. When assigning the pub/sub role the Publisher role is not available to choose from. I chose both "Editor" and "Admin" instead and neither worked. You have to assign your principal the pubsub.Publisher permissions using IAM instead which involves a few more steps. If this isn't done you cannot create a topic and allow the pub/sub Topic to become enabled.

2.) At the end of the process when GCP is configured and you are linking the account in HA the output in the screenshots are different / not displayed now. I guess again that this is due to changes within Google.

Regards Eddie

URL

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

Version

2025.4.0

Additional information

No response

Contributor guide

Tech stack
gcppython
Domain
documentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
GCP accountHome Assistantdocumentation markdown
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the current GCP console workflow for setting up pub/sub permissions and update the documentation accordingly. Specifically, verify that the role 'pubsub.publisher' is no longer directly assignable as stated and document the IAM alternative. Also, capture new screenshots for the final linking step in Home Assistant as the UI has changed. Reference the current Nest integration page at https://www.home assistant.io/integrations/nest/ and the related configuration steps.
Update config steps for Nest to match current GCP setup · home-assistant/home-assistant.io#38367 | Good First Issue