IoT Based Smart Monitoring of Environmental Parameters and Air Quality Index

This paper presents an IoT based approach to monitor air quality in various outdoor and indoor environments. The proposed system uses NodeMCU with integrated Wi-Fi module along with necessary sensors for monitoring the air quality index (AQI) at different site locations. In addition to the measurement of AQI, parameters like humidity and temperature can also be recorded at the site. The system employs MQ-5 gas sensor for air quality sensing and DHT-22 sensor module for both temperature and humidity sensing. The sensed data is stored using cloud technology and ThingSpeak cloud platform is used to do so. The user is notified through an email alert as air quality reaches a certain threshold level. In addition, the environmental parameters like temperature and humidity are also notified to the end user to enable the user to take appropriate action. The suggested approach is then validated by a comparative analysis of data collected from various sites.