Migrating Nest from OH2 to OH3

[dp3049 (David Phillips)]

Hi Folks,

I’m hoping this is a quick question. I’ve rebuilt my OH environment from scratch onto a Pi using OH3. Was previously running OH2 on OSX. I’m up to bringing my Nest environment across. Can I:

1. just copy the ProductID, Secret and Access token into the Nest Bridge config (leaving PINCode empty) - when I tried this I got Bridge status UNKNOWN.

or

2. do I need to create a new PIN and complete a ‘new’ install - when I tried to log into my NestDev account (which I have not used in a long time) I could not find where to generate a new PIN and kind of assume that function has been switched off?

Thanks, Dave.

[Bruce_Osborne]

Since Google killed “Works with Nest” It might be better to figure out how to restore your OH2 backup on the Pi and then upgrade.

I do not think Google permits any changes on their legacy system.

[BobMiles]

Hi,
have a look here to get it working without Works with Nest: Google Nest Device Access Console now available - #181 by dathbe

[dathbe (DTB)]

To be clear, the post by me directly linked above is a sort of second step to the process. Earlier in the thread you’ll see instructions for setting up the new binding. My post deals with the optional (if you’re only using thermostats) step of adding pub/sub integration.

But yes, I can confirm that if you do a new install, your old Works With Nest integration will likely die.

[BobMiles]

Sorry that is my fault, I thought I had linked the thread but on my mobile phone I must have gotten the wrong one! I wanted to link the thread instead of dathbes post.

[delid4ve (Dave)]

You can get it working if you have the tokens. See here:

Works With Nest - Deprecating on August 31, 2019

It’s not because you have to regenerate the pin after it’s first use. The access token gets saved to a properties files saved to a .java folder somewhere (I run in Docker so I don’t know where the folder gets created normally, maybe ~openhab.java). But I don’t know if the access token is encoded in some way before it get’s saved to that properties file. You would have to look at the source code.

[dp3049 (David Phillips)]

Thank you all for your valuable input. As always, it is much appreciated!

I was able to get the OH3 binding to work using the OH2 ProductID, Secret, and Access Token data. It didn’t work originally because I had copied the parameters from an old nest.items file. Instead, I was able to restore OH2 on my mac mini and browse to the paperUI items config and just copy parameters across and then wait. In the meantime, I manually configured the structure and thermostat. It seemed to take a while (nearly 45 minutes) to authenticate and start the data streaming process, then up came the structure and thermostat devices. The Nest Protects are now sitting in the inbox to bring online. This is great news.

The answer to my post is - Option 1 works. Thank you all for your hints and tips.