Decora Smart Wi-Fi devices rely on your internet connection and the cloud to provide app control. Even when a device is not communicating it still can be controlled manually. If you have recently experienced an internet outage the issue will likely resolve itself automatically. If the issue does not resolve itself, please check for firmware updates and if any devices are in need of a firmware update, please complete the update once reconnected.
If the device is showing as "not connected", please review the following: