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 measures the inside quality (particles and VOS (= Dutch; Vluchtige Organische Stoffen) in a scale without any numbers (it uses good, average, bad, very bad).
What is Dyson really measuring?
Second: I want 2 sensors to measure quality
I really like 2 CO2 sensors, to measure the home office and bedroom for CO2. While working from home, I noticed that the living room CO2 is peaking. I want to monitor those rooms too.
Are there any good sensors? Or is an extra inside module for Netatmo the better option?
Also, are there sensors that also measure what my Dyson measures? Or is that not good information to know (other for Dyson to sell their air cleaners)?
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 ventilation.
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 ābad smellā, paint and so on. And sometimes itās a bit to hard why the value is increased. Often the value is calculated to some index instead of ppm where low value is the best air quality the sensor has measured and a high value is the worst. The sensors often self calibrate so itās not possible to compare those values between different homes but they are good to measure the change in air quality in a specific location.
Thanks! @Toon_Vos you have an excellent last name for this topic! @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 projects are not really for me.
I had hoped there was a bit of an affordable sensor.
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 ā of that price I am happy with it. But thanks!
@rindler I believe you can add up to 2 extra modules to the weather station, adding it up to a total of three (plus one outside module).
Ah, seems right. Then I think itās the best choice except that you donāt 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.
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 donāt know how accurate the measurements are because of the use of eCO2.
But for my purpose I think it will work.
Iām using a Norwegian designed air quality monitor that works perfectly with Homey, called AirThings.
Hereās a screenshot from within the Homey app, as you can see it covers most of the data you need.
@TonyaDigital Hi, Iām looking for Airthings users, hope you can answer. Youāre using a Wave Plus? Hub or direct to Homey? The official app at Airthings App for Homey | Homey or something else? That page shows no flow cards for radon or VOC, has that been fixed?
Also, have you heard any news of Airthings View Plus support? Itās not listed as supported in Homey yet.
thanks
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.
