Real-time Gas Leakage Alert System Using Microcontroller and SMS

Gas leaks pose serious threats in residential and industrial spaces, often resulting in health hazards, fires, or even explosions if left undetected. Traditional detection methods are either costly or fail to provide instant notifications. This work introduces a that employs the ESP8266 microcontroller in combination with an MQ-2 sensor. The system continuously measures gas levels and, upon detecting concentrations above a defined threshold, sends an SMS alert to a registered mobile number through GSM-based communication. Unlike internet-dependent IoT solutions, SMS ensures fast alerts even in areas with limited connectivity. Testing results demonstrate reliable operation, rapid detection, and SMS delivery within seconds. The system is designed to be low-cost, energy efficient, and suitable for kitchens, storage rooms, and industrial facilities, ensuring timely intervention to reduce accidents [1][2][4].