The Threshold app displays an online/offline status for devices in Settings > Manage Devices. It can take up to 15 minutes for the app to reflect an offline status if your plug recently lost connection. If your plug has gone offline, unplug it from the outlet, wait 5 seconds, and plug it back in again. If the LED slowly pulses blue for several minutes, then your device is in pairing mode and is not connected to any network.Please note that the visible LED otherwise only indicates if the plug is letting power through it or not. It is not a sign of connectivity to your network.