This little proxy will connect to nest and publish the data to a mqtt broker.
I used the IBM IoT Cloud more information are at https://internetofthings.ibmcloud.com/#/ and
https://developers.google.com/+/quickstart/android
you will need to update configuration.properties file
org=Your IBM IoT Org
type=mvk-laptoplan
id=Your Mack 00-21-CC-C8-6F-1AA
auth-method=token
auth-token=Your Token
nestusername=nest email address
nestpassword=NestPassword
run npm install and node devicetoiot.js
Please node this is just a playground and not for production or anything just test purposes.