I remixed the original model, having split it into 3 parts for easier printing and assembling.
You will need 8 heat set inserts and 8 m3x8 screws. Heat set inserts are to be inserted into the middle part on both sides.
I used Wemos D1 Mini, SSD1306 screen with SPI connection, MH-Z19B CO2 sensor and additionally DH11 to compare temperature results and get humidity data.
The author remixed this model.