Hello Andre !
Yes I’m using Homey, Lifx bulb, Sonos and sensors as alarm 
First I’ve “Trigger” flows with motion sensor and “open/close” doors sensor:
When triggered, this flow launch the “Alarm scene” flow. This flow manage flows to activate and disable after x minutes. He also notify me via notification:
Finally I have alarmSound and alarmLight flows:
I’ve also my IP Cam who start recording on my synology when I leave my apartment.
Hope it helps !
