I Gusti Ayu Isnaini Fatha Ramadhani, Tiara Zakiyah Putri, Yulmaisi Dwi Asmarita, Sulfa Amania, Nandang Mufti, Muhammad Alfian Mizar, Hasan Ismail, Harits Arrosyid
This research created a gas concentration monitoring system utilizing the Internet of Things (IoT), which can measure and display eight environmental parameters in real time, such as temperature, humidity, and the concentrations of gases like O3, CO, CH4, CO2, SO2, and NO2. The system utilizes an ESP32 microcontroller to process data from sensors and transmit it to the ThingSpeak database via a Wi-Fi network. The monitoring results are displayed on a Nextion screen and an App Inventor-based application, allowing data access through smartphones. The system was tested using ambient air samples at Universitas Negeri Malang for two hours. The results indicate that the system operates stably and can accurately transmit and display data, while maintaining server connectivity even during network disruptions. The average concentrations recorded were 0.0539 ppm for CO, 323.15 ppm for CO2, 0.35 ppm for CH4, 0 ppm for SO2, 0.148 ppb for O3, and 0.0165 ppm for NO2, indicating good air quality. The undetected SO2 levels were due to minimal nearby sources such as traffic or industrial activity. With this success, the developed system has the potential for continuous air quality monitoring and can be integrated with other IoT platforms for further data analysis.. © 2025 IEEE.
Universitas Negeri Malang, Faculty of Mathematics and Natural Sciences, Departement of Physics, Malang, 65145, Indonesia; Universitas Negeri Malang, Centre of Advanced Materials for Renewable Energy, Malang, 65145, Indonesia; Universitas Negeri Malang, Faculty of Engineering, Departement of Mechanical Engineering, Malang, 65145, Indonesia; Universitas Negeri Malang, Faculty of Engineering, Departement of Electrical Engineering and Informatic, Malang, 65145, Indonesia
