KiCad boards from 8 GitHub repositories tagged “co2-sensor”, the most starred first; open any of them in PCBKit.
SWAT-engineering/kiwi-air-monitor
Kiwi monitor is an open source CO2/Humidity/Temperature sensor intended for monitoring the quality of the air in a room. Kiwi was created to support teachers with a notification to ventilate their classroom.
strayer/EnvironmentalSensor
A WiFi environmental sensor based on Tasmota that reports temperature, air pressure, air quality, humidity and CO2 (ppm).
Sarbf1/Gas-sens_Rs-485
a compact, cheap gas sensor with RS-485 connectivity
theArcher73/attnode-addon_mh-z19
small functional CO2-sensor based on attnode v3 and MH-Z19
bboe/fug
Carrier PCB joining a WEMOS D1 Mini (ESP8266) to a Sensirion SCD30 CO2/RH/T sensor. Script-generated KiCad.
Djuke-DIYAudio/indoor-sensor
Affordable indoor sensor for measuring CO2, temperature, humidity and pressure
HeyPCB/air-ghost
Air Ghost: A little ghost that blushes red when your room needs fresh air. KiCad 10, heypcb.ai merch.
Szymon423/Air-Quality-Sensor
Open-hardware indoor air quality monitor: ESP32-S3, SCD41 CO₂, SHT4x temp/humidity, SPA06 pressure, WS2812 LED ring. Round PCB in KiCad, 3D-printed enclosure.
SWAT-engineering/kiwi-air-monitor
Kiwi monitor is an open source CO2/Humidity/Temperature sensor intended for monitoring the quality of the air in a room. Kiwi was created to support teachers with a notification to ventilate their classroom.
SWAT-engineering/kiwi-air-monitor
Kiwi monitor is an open source CO2/Humidity/Temperature sensor intended for monitoring the quality of the air in a room. Kiwi was created to support teachers with a notification to ventilate their classroom.