Trisnanti SP, Yantidewi M, Deta UA. Carbon Monoxide (CO) Level Measurement Using Internet of Things (IoT) Based Drone with NodeMCU ESP32. protk [Internet]. 2024 Sep. 9 [cited 2026 Jun. 19];11(3):214-9. Available from: https://ejournal.unkhair.ac.id/index.php/protk/article/view/6237