Honeywell Total Comfort Thermostat - Heat Pump

I have a heatpump attached to my thermostat, but when the weather gets around 34 deg F, it starts to get ice buildup. My thermostat can be set to “Emergency Heat” which tells it not to use the heatpump but to instead use the furnace only.

I’d like to request the ability to recognize EmHeat mode in the connector, such that I can write an automation which would check the weather, and when it gets below 35 or so, switch to Em Heat mode etc etc.

Thanks!