Eklavya I’oan M. Sohal | Lloyd Andrew D. Agbisit | Gabriel Micha G. Balignasay | Rysa Miel R. Magllanes | Michelle Angela M. Salazar | Denise Aiverlyn D. Villar | Jerkin Jexel Pedrosa | Joseph De Mata |
April 30, 2026
This study developed an IoT-enabled LPG gas leakage detection system with real-time alerts to reduce fire and explosion risks. Using an MQ-6 gas sensor and DHT22 temperature sensor, data is processed by an ESP32 microcontroller, triggering a five-LED indicator and buzzer for local alerts. Simultaneously, a LoRa module sends data to a secondary ESP32 and the G.A.R.D. mobile app for remote monitoring. Tests showed reliable detection and notifications within 10–30 m (mean times 10.69–13.28 s, SD < 1). G.A.R.D. maintains reliable performance between 40m and 60m; however, signal failure occurs beyond 70m due to environmental and signal interference. The system provides a portable, IoT-integrated solution that combines local and remote alerts.