IOT Based Air Quality Monitoring System Result Analysis

Air pollution has become a serious environmental problem today, adversely affecting human health and the ecosystem. Due to increasing industrialization, vehicle emissions, and urbanization, the amount of harmful gases in the atmosphere is continuously increasing. Therefore, regular monitoring of air quality has become extremely important. This paper presents the development and operation of an Internet of Things (IoT)-based air quality monitoring system. The proposed system utilizes an ESP8266 NodeMCU microcontroller, an MQ135 gas sensor, and a DHT11 temperature and humidity sensor. The MQ135 sensor detects harmful gases in the atmosphere, while the DHT11 sensor measures temperature and humidity. The collected data is processed by the ESP8266 microcontroller and displayed on a 16×2 LCD display. This data is also transmitted to the Internet via the Blynk IoT platform, allowing users to monitor air quality in real time using their smartphones. The system categorizes air quality into Good, Moderate, and Bad categories. If air quality deteriorates, a fan is activated via a relay module to improve ventilation. The proposed system offers low-cost, high-efficiency, and real-time monitoring. This system can be useful in homes, offices, industries, and public spaces.