Yes, you can see this on the Mysa App. If there is a red exclamation point in one of your thermostat cards, the thermostat with this red exclamation point is not connected to the Wifi. If a connection is not established within an hour, an E-Mail will be sent to the E-Mail address used to set up the thermostat. If you receive this E-Mail, you should try to determine why the connection was lost. It could be a loss of power that has affected it, or it could be an external factor that has affected the connection.