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Diane H
Reviewed in the United States on January 10, 2025
Solder this to an esp32c3, get Sensirion’s sketch from GitHub, make a handy co2 sensor. Make sure scl and sda are the right pins. I make the led flash when air is too stuffy.
Timothy T.
Reviewed in the United States on October 24, 2024
I used it with ESPHome and an ESP32 dev kit. It needs a stable 3.3V power supply otherwise the sensor disconnects sometimes. Make sure to turn off auto calibration. It usually takes couple minutes after startup to stabilize temperature and humidity.
DJC
Reviewed in the United States on October 8, 2023
Make sure you read the documentation. By default it re-calibrates weekly, taking the lowest measurement as the reference. Depending on your environment, that may seldom go below 500-600ppm (or more!).
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