Green Energy Based Low Cost Smart Indoor Air Quality Monitoring and Purifying System

This work deals with cost-effective Internet of Things (IoT)-based portable air quality and purifying system for a limited confined space, viz inside a room/car. Indoor air quality has become a major concern especially in India; it needs to be elevated because of its potential risk to human health. As a result, we are trying to develop an easy-to-adopt technique for detecting the pollutants in air around us and control the impurities as much as possible by using a portable filtering system. It is specially designed for indoor applications only and the main pollutants/hazards lie with dust particles, carbon monoxide(CO), nitrogen dioxide, sulfur dioxide, secondhand smoke, LPG, etc. In our system, we accommodate a group of sensors those can detect the above-mentioned pollutants. The detection or the monitoring system is directly connected with the sensors outputs and have a local display along with a remote monitoring and control system enabled by IoT. The controlling unit is consisted of series connected HEPA filter and activated charcoal filter along with ATmega328P microcontroller. To swift the process of filtering, a BLDCM fan is used to suck the air from surroundings at high RPM. The whole system is powered by a 12 V–10 W solar power.