Chachuli, Siti Amaniah Mohd, Wong Hui Ying, Nur Hazahsha Shamsudin, and Omer Coban. “Real-Time Monitoring of Carbon Dioxide With IoT ThingSpeak Using TiO2 Thick Film Gas Sensor”. Journal of Engineering and Technological Sciences 56, no. 5 (September 30, 2024): 593–602. Accessed October 16, 2025. https://jets.itb.ac.id/jets/article/view/435.