I assume you have completed the Classic App to New app migration, and Smart Home Monitor (SHM) is not supported after the migration. So you will have to use the SmartThings Home Monitor(STHM) instead. See below for the difference between SHM and STHM, and how to use STHM. (STHM API is not open to any 3rd party yet, and the workarounds are included in the post too.)
I wasn’t able to change the comfort setting via Rule Engine neither webCoRe. It seems not supported via the stock SmartThings Ecobee integration. (Ex: I can “resume program”, but not able to set it to “Home” specifically.) Although I have seen other people using community developed device handler, and able to change the comfort settings, but I did not have any personal experience with those device handlers though.
You can just enable the Ecobee Plus skill in Alexa to voice command the Ecobee. For examples:
- “Alexa, ask ecobee to set the temperature to degrees”
- “Alexa, ask ecobee to set to home/away/sleep”
And see the complete supported commands below.
https://support.ecobee.com/hc/en-us/articles/115002790988#ecobeeskill