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House fires are among the most common and dangerous emergencies that can result in injuries, loss of life, and significant property damage. The research problem addressed in this study is: How can Internet of Things (IoT) technology improve the early detection of fire, smoke, and gas leaks while providing real-time alerts to homeowners? The research hypothesis proposes that an IoT-based monitoring system integrating flame sensors, gas sensors, and mobile notifications can improve early hazard detection and enable faster emergency response compared to conventional fire alarm systems. The methodology involved the development of an IoT-Based Smart Home Fire and Smoke Safety System using an ESP8266 microcontroller, three flame sensors, three gas sensors, a buzzer alarm, and the Blynk IoT platform. The sensors were strategically placed within a house model to continuously monitor fire, smoke, and gas leak conditions. Data collected by the sensors were transmitted via Wi-Fi to the Blynk application for real-time monitoring and notification. The analysis results showed that the system successfully detected the presence of fire, smoke, and gas leaks and immediately activated the buzzer while sending instant notifications to users’ smartphones. The system provided accurate real-time monitoring and enabled users to take prompt preventive actions. In conclusion, the developed system effectively enhances home safety through early hazard detection, real-time monitoring, and instant mobile alerts. This innovation supports Sustainable Development Goal (SDG) 11: Sustainable Cities and Communities by promoting safer, smarter, and more resilient living environments.

Keywords: Internet of Things (IoT), Smart Home Safety, Fire Detection, Smoke Detection, Gas Leak Detection, ESP8266, Blynk IoT Platform, Real-Time Monitoring, Mobile Alerts, SDG 11.