Design filename	File type	Open source license	Location of the file
‘casing (front)’	.stl	Creative Commons Attribution-ShareAlike 4.0 Int. License	https://doi.org/10.17605/OSF.IO/SNHFD
‘casing (back)’	.stl	Creative Commons Attribution-ShareAlike 4.0 Int. License	https://doi.org/10.17605/OSF.IO/SNHFD
‘CO2-Monitor-Station’	.JSON	Creative Commons Attribution-ShareAlike 4.0 Int. License	https://doi.org/10.17605/OSF.IO/SNHFD
‘CO2-Monitor_v7f’	.ino	Creative Commons Attribution-ShareAlike 4.0 Int. License	https://doi.org/10.17605/OSF.IO/SNHFD
‘requirements’	.txt	Creative Commons Attribution-ShareAlike 4.0 Int. License	https://doi.org/10.17605/OSF.IO/SNHFD
‘Adafruit_GFX_Library.zip’	OLED graphics library	BSD License	https://doi.org/10.17605/OSF.IO/SNHFD
‘Adafruit_SSD1306.zip’	OLED library	BSD License	https://doi.org/10.17605/OSF.IO/SNHFD
‘Heltec_ESP32_Dev-Boards.zip’	Heltec ESP32 library	MIT License	https://doi.org/10.17605/OSF.IO/SNHFD
‘LoRa.zip’	LoRa library	MIT License	https://doi.org/10.17605/OSF.IO/SNHFD
‘MH-Z19.zip’	CO2 sensor library	GNU GPL v3	https://doi.org/10.17605/OSF.IO/SNHFD
‘PubSubClient.zip’	MQTT client	MIT License	https://doi.org/10.17605/OSF.IO/SNHFD