How to build an air quality monitor using Raspberry Pi Zero W

Hi, it’s Takuya. Knowing the air quality is useful to keep yourself productive because the bad air quality would affect your brain performance more than you’d think. So, I built a room air quality monitor that displays the temperature, humidity, CO2 density, and barometric pressure of my home office. It notifies with sound when the CO2 level gets more than 1,000 ppm so I can know when to refresh t