ALPSTUGA recalibration and bug

Hardware
1

I seem to have uncovered an interesting bug in the Ikea ALPSTUGA device.

I was testing the VINDSTYRKA and ALPSTUGA air sensors on my desk. I had them both plugged into different ports of the same USB power supply. After some time I noticed the PM2.5 readings on both was at 1000! Where I live it’s usually 1 or 2.

I’ve had the VINDSTYRKA air monitor sitting on my desk for 6 - 12 months without these bad readings. I had a suspicion that maybe the USB power supply wasn’t supplying enough current. I moved the ALPSTUGA to a separate USB power supply and the PM 2.5 readings on both devices returned to the expected values or around 1 or 2.

However, the ALPSTUGA is showing a CO2 reading of 2200! I’ve bought a second ALPSTUGA and it’s showing a value of around 400 - what I would expect. The first ALPSTUGA has now been showing the 2200 reading for a number of days now (the doco said it might take 24 hours for the reading to stabilize and become accurate).

This all raises a few questions:

  1. Does anyone know if there’s a way to “recalibrate” the CO2 sensor in the ALPSTUGA?
  2. Does anyone in the community have any point of contact in Ikea where I can raise this with them. It seems the device permanently failing CO2 readings as a result of lack of current is a bug that needs addressing.
2

I have two of them on separate floors. When I was next to them, especially at first setting them up, i got weird/high values. They seem to be fairly normal now.

I have no direct remediation for CO2. It sends me a notification saying turn on exhaust fans / open windows. As of yet, that notification has not come.

I have an automation for PM2.5 that turns on the HVAC fan via ecobee, as the HVAC filter is HEPA13 Carbon backed and will remove some particulate matter.

The PM2.5 reading does go up when we cook but we haven’t triggered the automation yet. However we’re traveling and someone we know is watching the house. There have been a couple of times where the first floor PM2.5 got really high… the automation works: HVAC fan goes on and it can take 30 mins to an hour and a half to recover to a low level

I know this isn’t directly what you asked, but my comment is I have 2 alpstugas, and after they were placed in their “steady state” locations for a day or so, they work well. I bought separate USB “wall warts” to power them.