This cute little SHT3X module is also of the generic purple variety. You’ll also want to let the sensor run for at least 20 minutes on boot before trusting the readings. The datasheet for this sensor recommends that you apply a “burn in” period, by running it for at least 48 hours before use, which should add some semblance of stability to variations in sensitivity levels. ![]() The CCS811 does not directly measure CO2 and as a result, wouldn’t be usable as part of say – a green house gas sensor array. The CCS811 is a hot plate based gas sensor which detects Volatile Organic Compounds (VOCs) levels and provides an equivalent carbon dioxide estimate (eCO2) over I2C.ĮCO2 you say! Why, doesn’t that mean we could use this thing to detect CO2 levels outdoors as well?Īlas, the eCO2 reading is an estimate derived from the proven correlation between CO2 levels and VOC levels indoors. ![]() A generic purple CCS811 module – mind the WAKE signal, you’ll need to pull this to ground to communicate with the sensor TVOC/eCO2 Sensor
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