Measuring CO₂ using an ESP32 and the Adafruit SCD-41 CO₂ Sensor

Fri, 10 Jan 2025 00:00:00 +0000

Introduction

Last year, I bought the Birdie CO₂ monitor ¹ to measure my CO₂ values at home. This air quality meter resembles a canary bird, referencing the days where canaries were used in coal mines to detect deadly carbon monoxide. When these stopped singing (or even collapsed 😥), this was a sign that the air quality was poor, and the workers needed to leave the mines ².

This is how the Birdie looks when the air quality changes from good to bad and again from bad to good:

Electronics on emanuelduss.ch

Measuring CO₂ using an ESP32 and the Adafruit SCD-41 CO₂ Sensor

Introduction