Student: Refigean Serhan

Nowadays, air pollution is a big problem all over the world and this project aims to measure the quality of air that surrounds a user in such that he can take the best measures in order to keep his lungs healthy. The system checks the particulate matter, relative humidity, temperature, altitude, and the atmospheric pressure for this reason. The particles that are related to air pollution are also known as particulate matter. PM stands for particulate matter (also called particle pollution): the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, are large or dark enough to be seen with the naked eye. Others are so small they can only be detected using an electron microscope. Particles come in a wide range of sizes. Particles less than or equal to 10 micrometers in diameter are so small that they can get into the lungs, potentially causing serious health problems. Ten micrometers is less than the width of a single human hair.

Particle pollution includes:

• Coarse dust particles (PM10): inhalable particles, with diameters that are generally 10 micrometers and smaller. Sources include crushing or grinding operations and dust stirred up by vehicles on roads.
• Fine particles (PM2.5) : fine inhalable particles, with diameters that are generally 2.5 micrometers and smaller. Fine particles are produced from all types of combustion, including motor vehicles, power plants, residential wood burning, forest fires, agricultural burning, and some industrial processes

It is a low-power microcontroller (MCU) with integrated Wi-Fi and dual-mode Bluetooth—it is a successor of ESP8266 MCU.

This module is used for reading the temperature, pressure and relative humidity of the environment.

This sensor uses the principle of laser scattering to detect particles between 0.3 and 10 µm in the air. This sensor consists of a small fan, air inlet valve, laser diode, and photodiode. The air enters through the air inlet where a light source (Laser) illuminates the particles and the scattered light is transformed into a signal by a photodetector. These signals are then amplified and processed to get the particle concentration of PM2.5 and PM10.