Monitoring air quality and smoke emissions used Internet of Things technology at bus stop in urban areas using MQ-135 and MQ-2 sensors

In urban areas, air quality significantly affects community well-being and environmental sustainability. High economic activities often lead to air pollution from vehicles and industries, posing health risks. Monitoring air quality is crucial to detect pollution sources and their impact. Efforts to improve air quality include advanced technologies, emission regulations, sustainable transportation promotion, and raising awareness. This research aims to design an IoT-based air quality and smoke monitoring device using sensors like MQ-135 for air quality and MQ-2 for smoke. Data is transmitted to a server (Blynk) for user access. LED as indicate air quality, and a buzzer warns of hazardous conditions. This system provides real-time air quality information for a healthier urban environment.