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All Journal JPTK: Jurnal Pendidikan Teknologi dan Kejuruan Transmisi: Jurnal Ilmiah Teknik Elektro JURNAL BISNIS STRATEGI ELINVO (Electronics, Informatics, and Vocational Education) Proceeding of the Electrical Engineering Computer Science and Informatics International Journal of Community Service Learning Journal of Robotics, Automation, and Electronics Engineering
Dessy Irmawati
Universitas Negeri Yogyakarta
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Journal : journal of robotics automation and electronics engineering

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Air Quality Classification Using the K-Nearest Neighbors Algorithm: A Case Study in Juwana District Tanzila Bagus Ramadhan; Dessy Irmawati
Journal of Robotics, Automation, and Electronics Engineering Vol. 4 No. 1 (2026): March 2026
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jraee.v4i1.2553

Abstract

Air quality is an important factor in maintaining human health and environmental sustainability. Increasing transportation activity in Pati Regency contributes to higher air-pollutant emissions. This study develops a real-time air-quality monitoring and classification system using the K-Nearest Neighbors (KNN) algorithm. The system uses MQ-7, MQ-135, and SDS011 sensors to measure CO, CO₂, PM2.5, and PM10 concentrations. Measurement data are transmitted to Firebase Realtime Database and classified through a graphical user interface using Euclidean distance. Experimental results show that the system achieves 83% accuracy, 85% precision, 83% recall, and an F1-score of 82%. These results indicate that the proposed system can provide reliable real-time air-quality information for environmental monitoring applications.
Co-Authors Adi Dewanto Ahmad Taufiq Musaddid Ardianto, Adibatul Aris Nasuha Bekti Wulandari Fatchul Arifin Joko Laras B T Laras B T, Joko Moh Alif Hidayat Sofyan Moh. Khairudin Muslikhin Nur Hasanah Pradana, Alwi Widi Prasakti, Ridho Purno Tri Aji Rifali, Myza Tanzila Bagus Ramadhan Yuniar Indrihapsari Zainal Arifin