Successfully Integrating NEST Thermostat with Google and HomeAssistant

General
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Hey everyone, I wanted to share my recent experience integrating my NEST thermostat with Google and HomeAssistant. It was a bit of a journey, but I managed to get everything working smoothly! :tada:

I recently migrated my old NEST account to Google and noticed some compatibility issues when trying to connect it to HomeAssistant. Initially, I encountered an Error 400: redirect_uri_mismatch, which was quite puzzling. After some research and trial and error, I realized the issue was with the redirect_uri settings in my Google Developer Console. I had to ensure that the URI I was using matched exactly what HomeAssistant required.

Here’s what I learned along the way:

  1. Check Your Redirect URIs: Make sure the URI you’re using in Google’s OAuth2 settings matches the one HomeAssistant is expecting. I tried both my DDNS URL and a blank URL, but it wasn’t until I configured it correctly that everything fell into place.

  2. Update Your NEST Account: If you’ve migrated from NEST to Google, ensure all your devices are properly linked under your Google account. Sometimes, older configurations can cause conflicts.

  3. Community Support: Don’t hesitate to reach out to forums or communities like this one. I found some fantastic resources and tips that helped me troubleshoot the issue.

Now that everything is up and running, I can control my thermostat seamlessly through HomeAssistant, and it’s been a game-changer for my smart home setup! :thermometer::sparkles:

If anyone else is struggling with similar issues, feel free to reach out. I’d be happy to share more details or help troubleshoot! :handshake: