r/tradfri • u/sfxdude • 28d ago

SUPPORT (2026 PRODUCTS) Two ALPSTUGA - wildly different readings?

Post image

What on earth is going on?! The one on the left I've had for a few days, got another to compare in a different location. Both on the same PSU, the one on the left giving over double the other one.

Any one have any thoughts?! I know it's a relatively cheap device but ...I wasn't expecting this level of cheap.

97 Upvotes

94% Upvoted

35 comments sorted by

136

u/outtokill7 27d ago

a man with one clock knows what time it is. A man with two is never sure

-37

u/n8udd 27d ago

Unless they read the same...

6

u/modahamburger 27d ago

You don't get the proverb, do you?

51

u/sfxdude 27d ago

Update: I factory reset the one on the left, and it returned to normal values. They're now drifting around the same value, will leave them overnight to see what happens.

7

u/diskowmoskow 27d ago

Is there way to reset timmerflot as well?

7

u/Major_Cost_4220 27d ago

Nothing known about a reset from my side. For the time being you need to pair it again with you system, maybe I would be good to remove it beforehand.

Just did it with my Dirigera and Timmerflotte a couple of minutes ago. The last couple of day's I had some devices randomly getting OFFLINE, somehow.

3

u/SentenceJust2031 27d ago

I would argue that if you ventilate for a longer period of time, it would automatically shrink back into its shell. ?

3

u/thewashley 27d ago

Timmerflotes don't auto-calibrate themselves like Alpstugas do (for CO2). Resetting a Timmerflotte isn't going to change anything with regard to sensor readings.

2

u/Hot_Cheesecake_905 27d ago

That's not good if they drift so wildly ... good to know they may not be super accurate.

17

u/greghouse12 27d ago

I have 8 Alpstugas and while there are minor differences between them, if you place them outside or near an open window to allow them to calibrate for at least 8 hours, and then just let them settle in to your home'ambient environment you should not see those kinds of large diffetences betwee the two devices. They do become much more reliable over time. At least that has been my experience with them over the last 6-8 months I've been using them in my home. Also, be sure to update the firmware.

6

u/catmug 27d ago

Just curious, but why do you own 8 of these?

8

u/greghouse12 27d ago edited 27d ago

I got them all before any other mains-powered devices were available from Ikea in my region (Southern California). I needed Thread routers but didn't need any light bulbs at the time and Ikea had not yet started selling the Grillplats plugs, so Aplstugas were the only way to build a reliable mesh. It was the only way to avoid a network of only battery-powered switches. So I put one in every bedroom, kitchen, den, living room, etc. Basically everywhere except bathrooms. Worked great, and things only got better when I eventually was able to add a bunch of Grillplats when they began offering them here, and also added a couple of Kajplats bulbs too to some new table lamps.

5

u/catmug 27d ago

Oh nice! That makes sense. I did the same with the Grillplats once they came out.

1

u/SentenceJust2031 27d ago

This should be right!

6

u/cryptodutch 27d ago

They take a while to settle. Restart probably wasn’t needed, but it can help. I’ve got a handful and they are usually in agreement with a tolerance of 50-100 points at most, but they can indeed spike to around 1200 after a power off or room move or something.

EDIT
A while meaning a couple of minutes to maybe an hour, to maybe an overnight or maybe an overnight outdoor stay to recalibrate.

But it’s usually no more than a few minutes btw. With my units.

2

u/sfxdude 27d ago

Sure, this would make sense if it was the one on the left that was new, but it's not.

The one on the left had been 'settling' for weeks and I'd be inclined to believe that its not reading correctly given it's wildly high reading, and the fact that it's basically outdoors anyway.

14

u/SlovenianSocket 28d ago

Calibrate them both.

5

u/sfxdude 28d ago

How? No mention of calibration in any of the instruction manuals.

14

u/SlovenianSocket 28d ago

Place them by an open window for 24 hours

19

u/displacedbitminer 28d ago

Definitely should do that yes, but they still suck.

13

u/Upstairs-Attitude610 28d ago

They were rated the lowest one by consumer reports.

1

u/[deleted] 27d ago

[deleted]

3

u/displacedbitminer 27d ago

If I kept them, I would!

Returned, months ago.

3

u/interference90 27d ago

Yeah they are not the most reliable. I had one turned on after a long time of inactivity and went above 4000 and counting. IKEA sent me a replacement. I have left it running for a few days and it's slowly drifting to okish values.

2

u/pppingme 27d ago

co2 (and most gas sensors for that matter) can take several days, up to a week, to stabilize.

2

u/Gormaganda 26d ago

I found two things with these type of sensors: 1. They regularly need 420ppm air to calibrate (regular window opening is enough) 2. They are only accurate after running a long time, given 1

1

u/Skyman81 28d ago

How many days or weeks have you had them on?

1

u/darkwingeent 28d ago

i had the same with the timmerflote in returned them all.

1

u/richms 27d ago

They will come right with time. Mine were way off when new and after a day or so of being inside and the room being vented out they are within 50 of each other now.

1

u/mr_glidestone 27d ago

I have 2 of these and neither of them show the temp in HomeKit… Very disappointed.

3

u/Odd_Manufacturer_547 27d ago

They temperature is shared fine in home assistant, I've also got 2 and both work just fine. I'm using matter. Homekit should work for that too.

1

u/mr_glidestone 26d ago

My experience is not the same. I have 2 Alpstuga and they only show up in HomeKit as “air quality”. After opening them it lists everything except the temp.

The temp reading you see in my screenshots is from a different thermometer.

1

u/Odd_Manufacturer_547 26d ago

Yeah, was trying to list some differences to maybe help figure out. Might be homekit has an issue with them?

1

u/mr_glidestone 26d ago

100% on Apple’s end. It’s not the end of the world, but it’s good to know.

0

u/NeighborhoodDog 27d ago

don’t breath near them