Air Quality Monitoring Systems using IoT: A Review

High population and urbanization growth rate raises the issue of air pollution in recent years. Air quality monitoring is one of the major concerns due to its influence on human health. With the advancement in sensing and embedded technology, Internet of Things(IoT) becomes one of the economic alternative to implement air quality monitoring system(AQMS)compared to costly and fixed air quality monitoring stations. In this paper we present the ample review of candidate enabling technology for IoT based AQMS architecture. Specifically, we start with overview of major low cost air pollutant sensors classification, typical error sources and calibration methodologies. Then we present analysis and comparative study of infrastructure protocols and application layer protocols to support IoT based architecture for AQMS. We also review existing system and categorised them based on deployment strategy employed. Finally, challenges involved in building such systems are discussed in detail.