Sitti Jubaira Umar, Ab Kadir D. An IoT based Portable Air Quality Monitoring System with CO and CO2 Detector. JTeC [Internet]. 2020 Aug. 31 [cited 2026 Mar. 13];5(1):37-42. Available from: https://ejournal.unikl.edu.my/index.php/JTeC/article/view/762