Trisnanti, Sefrina Putri, Meta Yantidewi, and Utama Alan Deta. “Carbon Monoxide (CO) Level Measurement Using Internet of Things (IoT) Based Drone With NodeMCU ESP32”. Protek : Jurnal Ilmiah Teknik Elektro 11, no. 3 (September 9, 2024): 214–219. Accessed June 19, 2026. https://ejournal.unkhair.ac.id/index.php/protk/article/view/6237.