A few things you could try:
- Uninstall and reinstall the app on your phone
- Rebooting it again (you made sure it was upside down long enough, right?
- Try a different power adapter
- Tell us in detail which procedure you’ve followed when setting it up, and show us (screenshot) where it goes wrong
- Search the forum:
Homey setup does not continue
Can't access my Homey after setup
Unable to setup - Search the Athom website:
https://support.athom.com/hc/nl/articles/360009667354
