M5Stack CO2 Unit with Temperature and Humidity Sensor (SCD40)

The UNIT CO2 from M5Stack is a photoacoustic Carbon Dioxide (CO2) Unit that will tell you the CO2 PPM (parts-per-million) composition of ambient air. The unit has a built-in Sensirion SCD40 sensor powered by buck converter circuitry and communication handled via I2C. It has a range of 400~2000 ppm with an accuracy of ±(50 ppm + 5% of reading). It supports temperature and humidity measurements too - perfect for environmental sensing, scientific experiments, air quality and ventilation studies, and more. Features

* CO2 concentration detection * Temperature and humidity measurement * I2C communication (Add: 0x62) * Integrated 5V -> 3.3V Buck converter * 2x Brick holes * HY2.0 4-pin interface Specifications Resources Parameter CO2 Measurement range 400 ~ 2000 ppm CO2 Sampling accuracy ±(50 ppm + 5% of reading) Temperature range -10 - 60 °C Humidity range 0 - 95 %RH Communication protocol I2C: 0x62 Net weight 7.54g Gross weight 13.13g Product dimensions 48mm x 24mm x 16mm Package size 134mm x 61mm x 16.3mm Housing material Plastic ( PC ) Resources

* Product Documentation * Schematic * SCD40 datasheet * SY8089AAAC datasheet * Arduino Examples

* M5Unit-CO2 with M5Core * M5Unit-CO2 with M5Atom * M5Unit-CO2 with M5StickC * M5Unit-CO2 with M5StickCPlus

Pinout CO2 Unit SCL SDA 5V GND M5Core (PORT A) GPIO22 GPIO21 5V GND M5Core2 (PORT A) GPIO22 GPIO21 5V GND M5Atom (PORT A) GPIO32 GPIO26 5V GND M5StickC/Plus (PORT A) GPIO33 GPIO32 5V GND M5Station (PORT A1,A2) GPIO33 GPIO32 5V GND