Laundry fan when laudnry is in use?

#1

1) Give a description of the problem
I am trying to get the fan to come on if the laundry room is 5 degrees warmer than the rest of the rooms in the floor with the door closed

3) What is happening/not happening?
the fan will hit a point in the process where it’ll go on and off over and over

4) Post a Green Snapshot of the pistonimage

image
image.png1178×2107 262 KB

5) Attach any logs (From ST IDE and by turning logging level to Full)
(PASTE YOUR LOGS HERE BETWEEN THE MARKS THEN HIGHLIGHT ALL OF THE LOGS SND CLICK ON THE </> ICON TO FORMAT THEM)

#2

I think line 85 in the pic above should say "less than"

temp
temp.jpeg758×270 17.9 KB

While you are editing that line, I would also be tempted to change that +5 to a slightly smaller number. (+4 or less) This just expands the window a bit in case the temperature is fluctuating slightly.

  • Only make this tweak to the “Turn OFF” section above.
  • Leave the “Turn ON” at +5 so there is at least a one degree difference

This last suggestion is because temperature sensors tend to jump a bit throughout the day:

temp
(This is temperature readings from my SmartThings Door Contact sensor)

Another way to say this is, if you keep both numbers identical, you may unintentionally cause sporadic turn on & off 3-4 times an hour. (if the temp happens to be hovering around that one number)

Keeping a 1-3 degree difference will make your triggers more “purposeful”.

#3

Why would I make the while loop hek for temperature to be less than? The logic, to me, is that while the temperature is still hot (greater than or equal to restofhouse+5, then keep it on another 30 minutes, then once that is done, turn off.

How would I achieve that? I essentially need to take the turn off out of the while loop, and have a turn off at the end.

#4

My previous post was under the assumption that you wanted the fan to stay on UNTIL the temp has been lowered. (when hot, turn on… when cool, turn off)

I think I understand your goals better now… When it gets hot, you want the fan turned on for 30 minutes period… even if it is still hot. If this is what you really want, you can delete the entire IF WHILE block in lines 80-94 above.

Also, you can add two commands to lines 74-78 like this:

With Fan
  Turn ON
  Wait 30 minutes
  Turn OFF
End with

The other thing to keep in mind… if you do not touch line 68, the fan has the possibility of turning right back on the moment it turns off. You could circumvent this by changing line 68 to say:
IF Door’s temp RISES ABOVE blah blah blah

This will only trigger the fan on ONCE per heat blast. (but if it remains hot, it will not come back on)

This seems less than optimal to me, but I believe it is what you are asking for…

#5

First of all, having all these functions in one piston is going to really screw you up. Because if one trigger fires, then your whole piston will be evaluated. And anywhere that you’ve used a Condition instead of a trigger will happen again. The first thing to do would be to move things off into separate pistons instead of having async functions.
Also, you have a whole mess of combination of triggers and conditions. It’s hard to tell if all of these are intentional or not.
Also, why are you using variables for all your devices? You have a variable that only contains one device. This is going to slow your piston processing down a lot. If you’re trying to replicate for multiple rooms, then you can do that by creating a new piston with the backup code of the original and that will allow you to replace the existing devices with new ones for the new room.
Also, the function you are using Avg up temp, where are you getting that from?

#6

It’s probably easier to just break it down to the basic piston and see if it works like the one below.

@Ryan780, Avg Up Temp looks like a simulated device that is averages the temps from multiple sensors.

image
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#7

So you don’t want the fan on if the door is open?

#8

correct. door open = fan off,

but if the door is closed and temperature rises above x, then fan on. once it’s below y, then fan off.

Essentially.

#9

The solution is in post #2 above.