I'm presently working on an Air Quality monitor to be able to check the status of my environment and remote environments on ThingSpeak. I was planning on using the BME680 sensor. Does anyone have any experience with this or other air quality sensors? I'm looking probably for CO2 and the like (Volatile Organics), not so much particle sensors, though a combination may be best. What's your favorite air quality sensor? Every low-cost air quality sensor I come across is particle based. If you find a cheap CO2 sensor, I would be interested. CO2 is an important indicator of indoor air quality. Laboratory grade CO2 sensors cost around $50 or so. There are "equivalent" CO2 sensors based on the SGP30 that cost in the $15-20 range. I use ccs811 which needs I2C clock stretching and thus works well with Arduino like boards. It collects VTOC data and calculates eCO2. Great, thanks for sharing air quality environmental sensor thingspeak iot bme680
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