The adding time for the Hub is 5 minutes, please make sure you add all the devices within 5 mins, you can find the all 3 LED lights flash green light alternately, which means it is in pairing mode. Also, 1. Please make sure the Hub power is on; 2. Make sure your hub is connected to the internet; 3. You can reboot the hub and try it again, if you cannot add the devices, please contact us.