STEP 1. If the Base Station's indicator shows solid YELLOW dot, it means the Baby Device is disconnected from the Base Station.
Check the battery level of the Baby Device by double shaking the device to see if the indicator lights up, or from the Sense-U App->Setup->
Manage Devices->Child’s Baby Monitor->Three Dot. Replace with a new CR2032 battery if necessary.
Move the Baby Device closer to the Base Station and it should be able to reconnect automatically.
STEP 2. If the Base Station's indicator shows a flashing GREEN circle, it means the Baby Device is already connected to the Base Station. Refresh the app by tapping the On / Off button in the app, or by switching the app between foreground and background modes.
STEP 3. If the Base Station's indicator shows a flashing RED dot, it means the Base Station is unable to connect to the Sense-U Cloud. Move the Base Station closer to your WiFi router.
STEP 4. If the Base Station does not light up and it is not in Night mode (check the Sense-U app->Setup->Manage Devices->My Base Station), unplug its power cable to restart.