Measuring CO₂ using an ESP32 and the Adafruit SCD-41 CO₂ Sensor
Introduction Last year, I bought the Birdie CO₂ monitor 1 to measure my CO₂values 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: ...