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Which Variable Reflects Outdoor Temperature?


Don Cohen

Question

I want to configure my system such that when the outdoor temperature is over 75 degrees, the Thermostat (Control4) is set to Cooling Mode, and when it's less than 65 degrees, it gets set to Heating Mode.  (And I do understand there is an Auto setting that will work similarly, but for a few reasons, I'm not wanting to use this mode).  There is no external temperature sensor, but the outside temperature is always shown on my T3, which I assume gets it based on the latitude and longitude in the Project configuration, or perhaps somewhere else.

What I'm wanting to know is what to use as the Event to configure the programming.  When I look at the available Thermostat Variables, I see "OUTDOOR_TEMPERATURE_F", "TEMPERATURE_F" and "Control4 Outdoor Temperature".  I'm not seeing reference to wherever the T3 gets its temperature reading from.

Which, if any, of these Variables do I use, or is there a different/better way to do this?

Thanks.

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Some follow-up here.  Now that outside temperature is over 75, I was able to test this out a little.   I manually put the Thermostat on Heat Mode, then 'Executed' the Programming to see if it switched.

First, using the "OUTDOOR_TEMPERATURE_F" Variable didn't seem to work, as it remained in Heat Mode when I executed the programming.  I then tried "TEMPERATURE_F" and when I executed the programming, it switched to Cool Mode.

My question now is whether or not this is the 'best' way to do this.  As it stands now, any time the Temperature changes, the Programming would be executed.  Will this be a potential source of trouble, since there will be regular changes throughout the course of the day, although they wouldn't be frequent.

Thanks.

P.S. Actually, since the "OUTDOOR_TEMPERATURE_F" variable didn't seem to be the one I wanted, I need to change the Event that triggers this to be the same "TEMPERATURE_F" that did seem to work.

Screenshot 2020-03-28 13.22.35.png

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8 minutes ago, msgreenf said:

I would do a nested if.

If heat Activate cool.

Appreciate the reply.  Can you flesh this out a bit more?  I can't quite grasp what you're suggesting, and how it's different from the "If" I already have in there.

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1 minute ago, msgreenf said:

Your if is only based on temp. I am saying add a nested if inside of that. If mode is heat then change to cool.

Gotcha - thanks. Makes sense.

Do you see any issue with this programming being executed every time the temperature changes?  Is there any better way to address the Event side of the programming?

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