Hi,
If you want to do this outdoor threshold’s change mode and more, just look at
It’s a fully zoned Heating/Cooling solution which works with any ST connected thermostat. You can use smart vents or not to create physical/virtual zones inside your home.
You can control also room thermostats (for fireplace, basement, etc.) as well based on your main thermostat’s settings.
If you have ask Alexa, it can send verbal messages to Alexa for any major event (customizable).
Regards.