Honeywell Thermostat Options in Routines

I am fairly new to ST, so I am hoping someone can help me out here. I have a Honeywell TCC 6000 Thermostat Device that is currently connected through my STM and the Honeywell Total Connect Comfort app. I would like to control other option on my thermostat, but STM only allows me to set my temperature (thermostatSetpoint).

I am hoping to add to my “I’m Back” and “Goodbye” routine to control the thermostat fan state (thermostatFanMode) and turning the system from AC/Heat to Off (thermostatMode).

If I write a smart app to change the thermostat mode, can I have it executed when a certain routine is performed?