MQTTMaster: Honestly, I'd recommend Home Assistant over Smartthings for flexibility. Note that the setup time.

3 days ago · profile

I've been working with this for several years and it's been pretty solid. The automations work well if you understand correctly.

See also

• Question: automating triggered by sunset?
• Stupid question: is MQTT the same as HTTP?
• How to reduce latency in groups?