ZigbeeExplorer: I've been working with this for two years and it's been pretty solid. The notifications work well once you configure correctly.

15 days ago · profile

Honestly, I'd go with Home Assistant over Smartthings for reliability. Keep in mind the learning curve.

See also

• UI customization — where do beginners start?
• What monitoring devices are essential for a modern home?
• Has anyone tried ESPHome for light switches? Worth it?