SmartThings Community

Dryer notification based on temperature?


#1

As many of us have discovered, we can’t rely on the Samsung Multisensor’s vibration sensor to tell us when our laundry is done. But it has no problem reading temperature when it spikes to ~95 degrees or so.

Is there a SmartApp that could do this: If temperature rises above 90 degrees for more than 5 minutes, send a notification 10 minutes after it falls below 90 degrees.

This would assume there’s not a long “cool” spin cycle… but the point is we could use the temperature as a trigger.


#2

Core is very good at stacked conditionals which include duration:


#3

Well that was just about as easy as it could get. I created a new piston:

If Dryer temperature exits range 85F-120F

THEN

Send Push Notification ‘Dryer’s Done!’

About to go test it. Thanks to the community Gods and Goddesses for CoRE.


(Bobby) #4

If it works, that’s a much quicker solution than the solution I had on my to do list, to clamp a HEM to my dryer. Good idea!


#5

Sadly it didn’t work. But things look bright for CoRE to accomplish this task.


#6

Update: After a 2nd test, it actually does work like a charm! No changes needed.


(Dana ) #7

How are you measuring temperature? You put a sensor inside the dryer?! :slight_smile:


#8

Bahaha, nope - the sensor is just on the front door. It gets that hot, believe it or not.


(DavidK) #9

As many of us have discovered, we can’t rely on the Samsung Multisensor’s vibration sensor to tell us when our laundry is done

Is this true for most people?

It works great for me. I have the smart sense outlet for the washer and the vibration sensor for dryer and both work flawless.

I use the laundry app for the dryer and the vibration sensor.


#10

You are one of the lucky ones!


(DavidK) #11

@James_Watts

Do you have a minimum cycle time? Like 9 minutes? And a minimum full time, like 4 minutes?

I realize those numbers were originally meant for a washer, but they help the laundry app be accurate for the dryer.

They help with false positives.

Is the issue false positives or missing real endings of dryer?


#12

I’m not sure… The way I see it, the dryer only gets into that superhot range once, and stays there until it cools down. I’ll need to check to see if there’s a cool down period, and might need to add a bit of extra time to the tail. This isn’t something I want to rigorously test though, since running the dryer is expensive :wink:


(Robin) #13

Bit of a maker solution that’s only for the brave, but my washing machine and dryer both have an LED that only lights up when the cycles are complete and (on the washer) door has unlocked.

I’m planning to rig the LED’s to a contact sensor, for immediate and reliable notifications. I’ll need a dumb relay in the middle but there’s load of space inside the box for that. I’ll keep the battery contact sensor on the outside though.


#14

That sounds like a failsafe solution. Which contact sensor will you be using?


(Robin) #15

Depends on the voltage reading I get from the LED’s.

If it’s less than 16v I’ll use a MEMOlite which can take the voltage feed directly, and won’t need a battery so I’ll mount it inside the box.

If it’s more than 16v I’ll probably use a Fibaro Contact sensor which has external dry contact connection terminals. I’ll need to use a dumb relay to convert the hot contact into a dry contact.

Other option might be the Aeon dry contact sensor but it still needs the dumb relay and as I’ve never tried that device before (or even checked to see if it comes in an EU frequency) I’ll prob stick with Fibaro.

Hoping for less than 16v though for a neat, mains powered setup…


(Ron Talley) #16

II use Iris Smart Outlets which have power metering. Too much trouble with other solutions and this one works perfect.

If the power draw is above 10 watts then the dryer is on. (4 for washer)

Wrote a couple of pistons to monitor when the dryer/washer starts/stops, how many loads are done in a day/week and if the clothes stay in the washer too long after finishing then nag us in various ways.


(Joel W) #17

If you use a Smart Power Outlet, you have to make sure that the amperage can be handled by that outlet. Some dryers use more amperage than others.


(Dana ) #18

You’re lucky you haven’t met my washer, which is at 9 watts or less when off/not running after it has been unloaded, is at 10 watts or above when running (and falls back to 10 watts several times during a load), AND falls to 10 watts and sits at that level indefinitely when done with a load. Grrrrr…all my plans for a simple “<10 off, 10 or > running” piston blown to he-double hockey sticks.


(Dana ) #19

You know you’re crazy right, but in a kinda good way. :wink:


#20

Wait, how many watts does your washer use during load?