Most security cameras have similar reset functions. After a power outage, unplug your security devices and reset your WiFi.  Once your signal works, plug the cameras back in and hold onto their reset or power buttons for ten to twenty seconds. Wait a few minutes for the cameras to power on. Then, reconnect via an application or website.  ADT cameras will have slightly different protocols than other security camera manufacturers, but you can generally assume the same process. Most security cameras have only one or two buttons, making it easy to determine which one to hold down for a reset.