Brian Hakim Pangestu and Zuly Budiarso (2023) “System Early Warning System for Gas Leakage in Waterheater Using IoT-Based Mq-2 Sensor: Early Warning System for Gas Leakage in Waterheater Using IoT-Based Mq-2 Sensor”, JUPITER: Jurnal Penelitian Ilmu dan Teknologi Komputer, 15(1d), pp. 682–690. doi: 10.5281./6523/15.jupiter.2023.04.