Smart Air Quality Monitoring System using IoT

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This is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.

Year : 2026 | Volume : 13 | 02 | Page :
    By

    Vipra Bohara,

  • Kaustubh Bajaj,

  • Kinshuk Saini,

  • Lakshay Kacholia,

  • Mayank Sharma,

  1. Assistant Professor, Department of Electronics and Communication Engineering, Jaipur Engineering College and Research Centre,, Jaipur, India
  2. Student, Department of Electronics and Communication Engineering, Jaipur Engineering College and Research Centre,, Jaipur, India
  3. Student, Department of Electronics and Communication Engineering, Jaipur Engineering College and Research Centre,, Jaipur, India
  4. Student, Department of Electronics and Communication Engineering, Jaipur Engineering College and Research Centre,, Jaipur, India
  5. Student, Department of Electronics and Communication Engineering, Jaipur Engineering College and Research Centre,, Jaipur, India

Abstract

This paper presents the design and implementation of a Smart Air Quality Monitoring System using the ESP32 Wi-Fi microcontroller integrated with an MQ-2 gas sensor and a DHT-11 temperature and humidity sensor. The system continuously monitors environmental parameters including air quality (smoke, LPG, CO, and other combustible gases), temperature, and relative humidity in real time. The acquired sensor data is transmitted wirelessly to the Blynk IoT platform, enabling users to visualize live readings via a mobile or web dashboard. The proposed system offers a low-cost, portable, and scalable solution for indoor and outdoor air quality monitoring, making it suitable for homes, industries, and smart city applications. Experimental results confirm reliable sensor performance and seamless IoT connectivity, demonstrating the system’s potential for early hazard detection and environmental awareness. As the central processing unit, the ESP32 controller gathers sensor data, does preliminary analysis, and guarantees dependable wireless communication via Wi- Fi connectivity. Remote monitoring and rapid access to environmental data from any location are made possible by the incorporation of IoT technologies. Future integration with cloud- based analytics and intelligent decision-making platforms is made possible by the system architecture’s energy-efficient design and ease of deployment. Additionally, the information gathered can help identify pollution patterns in certain areas and enable long-term environmental research.

Keywords: Smart Air Quality Monitoring, ESP32, MQ-2 Gas Sensor, DHT-11, Blynk IoT, IoT, Real-time Monitoring, Wireless Sensing

How to cite this article:
Vipra Bohara, Kaustubh Bajaj, Kinshuk Saini, Lakshay Kacholia, Mayank Sharma. Smart Air Quality Monitoring System using IoT. Recent Trends in Sensor Research & Technology. 2026; 13(02):-.
How to cite this URL:
Vipra Bohara, Kaustubh Bajaj, Kinshuk Saini, Lakshay Kacholia, Mayank Sharma. Smart Air Quality Monitoring System using IoT. Recent Trends in Sensor Research & Technology. 2026; 13(02):-. Available from: https://journals.stmjournals.com/rtsrt/article=2026/view=247357


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Ahead of Print Subscription Review Article
Volume 13
02
Received 18/06/2026
Accepted 20/06/2026
Published 23/06/2026
Publication Time 5 Days
1

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