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This project is based on ESP8266 modul, a cheap DHT22 sensor and a CO2 and VOC sensor that can be found on AliExpress! The sensor is the same that Elgato EVE Room has for indoor air quality monitoring! The Sensor that compatible with this project:
Features:
- Indoor CO2
- Indoor VOC density
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Indoor Temperature(beta!) -
Indoor Humidity(beta!)
Sensor properties:
The sensor using technology called MEMS.
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It takes about 5 minutes for the sensor to heat up. Until that HomeKit will show Air quality is
Unknown, VOC density and CO2 values will be0! After heating up, values starts reading from minimum -CO2 450ppm and VOC 125mg/m3- , the sensor needs a little more time. So it takes about 10 minutes for the sensor to work properly! -
Other, cheaper sensors are on the market. One of these are comes from the same company that makes iAQ Core C. The company's other sensor wasn't that reliable, so i've decided to use this one. This sensor works for me since 2016 and still reliable!
