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The MH-Z19B NDIR CO2 sensor should be preheat for 3 minutes to be stable. Start Arduino Uno R3 along with MH-Z19B NDIR CO2 sensorn to collect data (ppm) The first 2 or 3 data from MH-Z19B CO2 are not ...
Using MH-Z19B CO2 Sensor, DHT22, OLED Display, and ESP32 with Arduino This project combines the MH-Z19B CO2 sensor, DHT22 temperature and humidity sensor, and an OLED display with the ESP32 to measure ...