I am a bit confused about air quality and CO2 sensors. First off all: what is is and where is it measured in? My Withings Scale and Netatmo Weatherstation measure CO2 in PPM. Which is quite straightforward. I have also a Dyson. Which reports the outside quality (AQI) in a scale from 1 to 11. And …

CO2 is an indication for air quality / level of ventilation I use the Netatmo sensors as you mention and have those connected to Homey. Every morning if CO2 levels went over 1000 it sends me a warning. In optimal situation it would trigger a process which would open a window or increase ventilatio…

You could buy the Netatmo healthy home coach if you want more plug and play CO2-sensors. PM2.5/PM10-sensors reacts to particles in the air, like dust, smoke, pollen and so on. VOC-sensors also reacts to human breathe but also to general “bad smell”, paint and so on. And sometimes it’s a bit to har…

[Screenshot_20210222-104036_Chrome] Insights from one of my arduino air quality sensors, measuring CO2, VOC and PM2.5.

MCO Home CO2. Works perfectly and accurately.

Thanks! @Toon_Vos you have an excellent last name for this topic! :slight_smile: @Martijn_C for that price I think I add just a Netatmo module to my system. @rindler , the Home Coach is, unfortunately, a different Netatmo product (and does roughly the same as the Weather Station). I think Arduino p…

Sure, but in my opinion the quality is better and you’re not relying on WiFi/API’s. Direct integration.

Just thought it’s not possible to add another netatmo indoor module? That was why I suggested the home coach.

That is stating the obvious indeed. But to be honest I am not looking for that level of quality I guess. I do agree that locking in into a third party service is always the second best option, but putting everything in the balance: for ⅓ of that price I am happy with it. But thanks! :slight_smile: @…

Ah, seems right. Then I think it’s the best choice except that you don’t get any values when the netatmo cloud is down, hehe. Happened me once for a couple of days, but other than that I think the values are about right for that price.

I have build one this weekend based on a Wemos mini and the SGP30 shield for around €18. It measures TVOC and eCO2. [image] It uses my MQTT server to connect with Homey using the Tasmota MQTT app. Installing Tasmota on the Wemos is pretty easy and well documented on the wiki pages. I don’t know…

Air Quality / CO2: what is it exactly and which sensor to buy

Devices

Gruijter October 13, 2021, 7:06pm 15

Just wanted to let you all know of a new app I published a few days ago. It supports the airQ device. Not a cheap device, but it has many built in air quality sensors, including a real CO2 sensor. A lot of other devices use some other sensor to approximate CO2.

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Air Quality / CO2: what is it exactly and which sensor to buy

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