My Ecobee smart thermostat lost it’s interface with SmartThings. The previous connection was created using the SmartThings Classic app which is no longer available. After struggling with installing the SmartThings Community Installer App then the Ecobee Suite Manager from Github I found that there is native support now in SmartThings. I simply installed the device from the SmartThings mobile app.

As with other devices, they must be authorized in ActionTiles before use. From the ActionTiles website, select location from My Locations, Add Devices (from location), select new device and click Authorize. The tiles can now be added using ActionTiles Panel Builder.