CO2 Easy
The CO2 sensor bible MH-Z19B
Discover all the secrets of the MH-Z19B CO2 sensor in one place. An inexpensive, accurate (for the price) and very easy to use CO2 sensor.
Easily connect an SSD1306 OLED display (or two) to ESPEasy
Using an OLED display with ESP Easy is very easy. Here are the step-by-step instructions with video
A home CO2 meter with Wifi against the coronavirus: The CO2 Easy
Easily build your own quality CO2 meter in an afternoon