Hi there,
Any suggestion on how to achieve this.
If door sensor detects door opening for ## minutes, then play a sound file on Sonos for XX minutes.
Stop playing the sound file if the door sensor shows closed, or a specified time limit is up.
webCoRE can do this. Go to the webCoRE forum at https://community.webcore.co to find the wiki page for installation instructions and a video. There isalso a section of example pistons you can search through. If you need assistance building the piston, just ask in the forum over there and there are some folks who love to help. But to sum it up, webCoRE do can everything you posted above 