Real Time Indoor Air Quality Monitoring System Based on IoT using MQTT and Wireless Sensor Network

Abstract

Indoor air quality contains various sources of pollutants and can be more dangerous than outdoors, which mandates an indoor air monitoring system. Advances in information technology led to the idea of developing a better and more efficient monitoring system. This paper presents a real time indoor air quality monitoring system based on internet of things using Message Query Telemetry Transport (MQTT). This study focus on development of a real time system to detect parameters from Indoor Air Quality (IAQ) such as temperature, humidity, CO2, and dust, using low cost sensors. then implement it at campus area. Calibration of the nine sensors used in the three sensor nodes were utilized to determine the error value of each sensor. Performance and reliability tests of the three sensor nodes were also done, and the three sensor nodes showed reliable values. The data retrieval process becomes more efficient and faster using MQTT as a communication protocol. Implementing the proposed system in a campus environment showed differences in the value of air quality in different locations and situations. The end results of this research is development and improvement of IAQ monitoring system that use IoT and Wireless Sensor Network (WSN) technology for more efficient and remote monitoring information system.