If LED light doesn't stop blinking during setup, then that indicates that your device is having issue with connecting to WiFi. Follow the steps below to resolve it:
1. Go to your phone's WiFi setting, and tap on your Home WiFi and select forget network.
2. Uninstall the Nexx Home app, and restart your phone.
3. Connect your phone back to your Home WiFi.
4. Once connected to WiFi, reinstall the Nexx Home app and repeat the set up process.