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Have you ever wondered about the quality of the air you are breathing, or maybe, why you sometimes feel sleepy in the office or tired in the morning even after sleeping all night? Poor air quality can lead to many negative health effects as well as can cause tiredness, headaches, loss of concentration, increased heart rate and so on. Monitoring the quality of the air may actually be more important than you realize. So, in this tutorial we will learn how to build our own Air Quality Monitor which is capable of measuring PM2.5, CO2, VOC, Ozone, as well as temperature and humidity.

I will explain how each of air quality parameters affect us and how the sensors work. The brain of this project is an Arduino Pro Mini board which in combination with a 2.8” Nextion touch display provides a decent user interface.

We can see the measurements from all the sensors in real time, and if we click on a particular sensor, we will get values from the last 24 hours from that sensor. There’s also a dimming function through which we can lower the brightness of the display or even turn it off completely. This is convenient, for example, if we want to track the air quality in our bedroom during the night.

We can turn off the screen for the night, and the next day we can check the values from each sensor individually.

Nevertheless, now I will walk you through the entire process of building it and explain how everything works. At the end of this video, you will be able to build one on your own. So, let’s get started.”

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