🌬️ Optimized Air Quality Sensor Breakout - VOC and eCO2 (3709) by Adafruit Review

Although it says it measures eCO2, which I believe, it seems unrelated to actual CO2 measurements. VOCs of any kind cause spikes in VOCs and eCO2. So when you swipe the floor, expect the ad to jump. If you really want to measure CO2, look elsewhere. You need an NDIR sensor like https://www.amazon.com/dp/B014PDFP9S/ref=emc_b_5_t to read CO2.

Very easy to use (with Tasmota), fast response (seconds) and very sensitive. Spray some sanitizer/deodorant a few rooms down, or light up some toast, and it's in the "red zone" in about 30 seconds. Open the window and the reading will return to a safe value just as quickly. I used Wemos D1 Mini Lite and this sensor; That's it, just two parts and a USB power supply, cable and case. Added readings to another project with a display and also alerted our phones when air quality crossed a threshold.

Although it says it measures eCO2 which I assume it doesn't seem to have anything to do with actual CO2 measurements. VOCs of any kind cause spikes in VOCs and eCO2. So when you swipe the floor, expect the ad to jump. If you really want to measure CO2, look elsewhere. You need an NDIR sensor like https://www.amazon.com/dp/B014PDFP9S/ref=emc_b_5_t to read CO2.

Very easy to use (with Tasmota), fast response (seconds) and very sensitive. Spray some sanitizer/deodorant a few rooms down or light up some toast and in about 30 seconds it's in the "red zone". Open the window and the reading will return to a safe value just as quickly. I used Wemos D1 Mini Lite and this sensor; That's it, just two parts and a USB power supply, cable and case. Added readings to another project with a display and also notifies our phones when air quality is above a threshold.