“The meter calculates the temperture, humidity and carbon dioxide en shows the result on a small display. It also collects the data en sends it to a database. I also created a small website which displays all this data in graphs. The database is made in MySQL, the website is written in Flask, and the hardware is attached to a raspberry PI. All my code is also uploaded to my raspberry PI. In this tutorial I will show you how to create an Air Quality Meter for your own.”