I have many SmartThings devices in an airbnb property that I manage in Palm Springs.
To control AC costs, I created a flow that turns off the AC in an area of the house (there are two thermostats) when I nearby door is left open for more than two minutes. It also displays a message on a LaMetric Time that says “AC OFF, Please Shut Door”.
My next step is to create a flow to see if the AC is turned back on while the door is still open and then turn back off.
Bosch Motion Sensor
LaMetric Time (via IFTTT)