Hi, it takes some special logic to control an evaporative cooler.
With the help of a contributor living in Arizona, I’ve developed such logic based on an internal humidity/temp table which indicates when it’s most efficient to turn on the evaporative cooler switch(es).
For more details, refer to the following thread:
P. S. The smartapp is able to control any thermostat and evaporative cooler switches as long as they follow the standard ST capabilities.
The feature is called “alternative cooling”.
http://thingsthataresmart.wiki/index.php?title=ScheduleTstatZones
Refer to the use cases in the configuration section at the ST community wiki.
Regards