TL;DR is there any way around the new OAuth changes?
I just tried setting this up and it looks like I’m having an OAuth issue (“You are not authorized to perform the requested operation.”)
In the OAuth tab for the Ecobee Connect app, I see no “Enable OAuth in Smart App” option. In the list of SmartApps, the Ecobee Connect app has a value of “true” under the OAuth column.
A 4/29 update to this thread indicates SmartApps now need to be reviewed before OAuth is privileges are granted. I use a third party Android app, SharpTools, which recently pushed out an update, asked for reauthorization, and is now working again.
Thanks for any help