I have notifications saying that my devices are offline, and they show as offline in the app, how do I get them back?

Sometimes the communications can be interrupted by interference, especially if a device is far away from the hub. Normally the device will come back online in a few seconds, but if it stays offline try restarting the hub by briefly turning it off then back on (you can pull the power plug out of the hub until the lights go out, then push it back in). This will normally bring all devices back online.