Addition operations in a comparison

#1

I want to turn on a fan when the inside temperature is 5 degrees higher than the outside temperature. The only options I can find on the dashboard are direct comparisons; i.e., same as; greater than, greater than or equal to, etc.

Thanks much!

Looie

#2

You use those comparisons but rather than comparing to a value, you would change the popup to compare to an expression - then type outsideTemp + 5 (or however you are getting your outside temperature) in the text field for the expression.

#3

Thanks much!

#4

Would you be willing to expound on this a little bit?

I have an app that manages my garage heat mitigation fan (for the summer), and I’d like to migrate that functionality into webCoRE.

It monitors an inside and an outside temp sensor, and turns the heat exhaust fan ON whenever the outside temp is at least 10 degrees hotter than the inside fan.

I see your response above, but I don’t completely understand the ‘expressions’ part.

In that part, are you using terms that are built-in somehow, or is it something I need to specify somewhere?

EDIT: I’m reading the thread about expressions :slight_smile:

UPDATE: I think I got it figured out…

TempFan