To keep the Precept Home app from using too much of your phone's battery, it stops communicating with the Precept Touch if it is still for more than about 20 seconds.
In normal use, as you move up to your door, the Precept Home app will communicate with the Precept Touch. However, during training, if you stand still, the Precept Home app could stop communicating with your Precept Touch. If the Precept Touch does not respond during training, lightly shake your phone to make it communicate again. You can also move away from your door and then back again.
If the pairing process fails, perform a reset on your Precept Touch. This reset erases any previous pairing attempts or owners.