A Low Cost Smart Pollution Measurement System Using REST API and ESP32

The ongoing trends in technology enable the communication between devices through wired or wireless medium. The Internet of Things (IoT) and Machine to Machine (M2M) communication are such trends in technology which make the networked devices to communicate and performs the action without human interventions. Moreover, one problem is debilitating to air quality and its measurement in Indian cities. The major contributors to air pollution are the smog, sulfur dioxide, nitrogen oxides, CO, PM10, PM2.5. These gases are found as the most important in terms of human health Problems. It can cause lung cancer, asthma, breathing problems. In this proposed system, MQ-9 is used for measuring CO, LPG, CH4 value, DHT22 is used for measuring temperature in degree celsius and humidity in percentage, dust sensor is used for measuring dust particles MQ-135 is used for measuring benzene, ammonia, sulfur dioxide in the Environment. This measured data is put on to the server by using REST protocol (REpresentational State Transfer protocol)and ESP32. All sensors readings are displayed on the webpage and mobile application.