CO2-ESP32

Arduino CO2 and Temperature logger based on BOSCH BME280 and Winsen MH-Z19B

Functions

• Shows C02, Temperature, Humidity, Pressure
• Temperature (and humidity) can be corrected, if the BME280 if off calibration
• Thingspreak implementation including WiFi access

Parts needed

• DOIT! ESP32 (any ESP32 should work, might not fit in the case)
• OLED 0.97" 128x64 Display
• MH-Z19B CO2 sensor

• BME280 sensor

  -> I'll had a 5V compatible version

  -> Make shure you connect it to 3.3V if you don't have

Shematics

User Interface

General Interface

Log