IoT based air quality monitoring system

ABSTRACT

The ultimate goal of this project was on developing an Internet of Things (IoT) based air

pollution monitoring system. This document gives stage by stage procedures that the developer

undertook in coming up with the system. The developer undertook an assessment and the

results showed that air pollution has alarming effects. Its effects cause a lot of human diseases

which include respiratory and heart conditions amongst other body threats. The objectives of

this project are to monitor air quality as the detects harmful gases like, carbon monoxide,

Sulphur dioxide and nitrogen oxide, to trigger devices such as buzzer and a fan when the

pollution levels go beyond and to show a pattern of the air quality components periodically on

the web platform. Components used to come up with the system include Arduino Uno

microcontroller, MQ135 gas sensor, 16*2 liquid crystal display (LCD), ESP8266 Wi-Fi

module, 10 K potentiometer, buzzer and a fan. Key findings within the study were the ability

of the system to sound an alarm using a buzzer when harmful gases are detected and ventilation

fan will turn on to extract the air.

In the first chapter, the background study, system goals, methods and tools used to develop the

system, delimitations, research limitations, and research significance were discussed. The

second chapter assessed the existing work versus the earlier work. The chapter represented the

existing system that surmount the earlier problems. In the methodology chapter, the

components that were used to come up with the system were discussed. The design phase of

the system illustrated how the system was designed. Lastly the implementation phase, system

testing, installation and maintenance were conducted.