An Arduino UNO-based system using the MQ135 sensor to detect harmful gases. Alerts are given via LED and buzzer, with real-time data shown on an LCD and sent to a mobile app via Bluetooth for ...

The Air Pollution Monitor System measures the concentration of various gases in the air and provides real-time updates. The data is sent to the ThingSpeak server for visualization and analysis. The ...

Abstract: Emission checking is essential to reducing air pollution in urban areas. Conventional systems, such as Pollution Under Control (PUC) registration in India, rely on manual inspections without ...