Informative article with fair, fact based, conclusions.

I'd like to add that:

- The VINDRIKTNING is extremely consumer accessible ($11.99, good build, simple traffic light system).

- It may be put into spaces that previously had no particulate air quality monitoring.

- The spouse-acceptance-factor is extremely high (unlike e.g. a couple of circuit boards wired together off of Aliexpress).

There are other consumer friendly offerings, but they aren't affordable (e.g. Amazon Smart Air Quality Monitor 4x cost, Airthings 10x cost). That being said, IKEA could fix their traffic-light system's cut off points for free and should consider it.

ahaucnx

It is actually pretty easy to build a much more accurate air quality sensor with the Plantower PM2.5 module as a base and a Wemos D1 mini as WiFi connected MCU. We have build instructions on our website on how to do it [1] + a nice 3D printable enclosure to pass the spouse-acceptance ;).

[1] https://www.airgradient.com/diy/

formerly_proven

I see that there's a tiny 20x20 fan in these modules. Do these make audible noise or are the fans in these running rather slowly just to have air movement "better than convection" through the sensor?

GekkePrutser

The person who did the original hack on these says they are audible and the controller is constantly switching the fan on and off so they reconnected it to 3.3v all the time. So it runs at a lower speed and constantly.

See this link under the low noise mod heading

https://github.com/Hypfer/esp8266-vindriktning-particle-sens...