Agus Alim et al. 2025. Development of a Smart Air Pollution Detection System Utilizing MQ2 Sensor and Node MCU ESP8266 with Telegram Integration. Jurnal Ekonomi Manajemen Sistem Informasi. 6, 3 (Feb. 2025), 1634–1640. DOI:https://doi.org/10.38035/jemsi.v6i3.4075.