Sistema de monitoramento remoto de gás de cozinha para deficientes olfativos

Abstract

Anosmia, an olfactory impairment that prevents the perception of odors, became even more prevalent following the COVID-19 pandemic, whose causative agent, the SARSCoV-2 virus, left permanent or prolonged loss of smell as one of its most frequently reported sequelae. For this population, the inability to detect the odorant added to cooking gas represents a concrete life-threatening risk, since liquefied petroleum gas (LPG) leaks are among the leading causes of residential fires and explosions in Brazil. Faced with this problem, this work develops a low-cost embedded system for remote detection and shutoff of LPG leaks in homes, with people with olfactory impairment as its primary audience. The solution integrates an MQ-6 sensor, responsible for continuous monitoring of gas concentration in the environment, with an ESP32 microcontroller with Wi-Fi connectivity, which publishes data in real time to an IoT platform via the MQTT protocol. Upon identifying concentrations above the safety threshold, the system automatically activates a solenoid valve installed in the gas line, cutting off the supply, and immediately sends a notification to the user via a mobile application, which also allows manual remote control of the valve. The methodology adopted includes bibliographic review, requirements gathering, hardware prototyping, firmware development and functional validation of the system. The results are expected to demonstrate effective response to leak detection, safe shutoff of the gas supply and delivery of alerts with low latency, establishing the solution as an accessible, replicable and genuinely impactful tool for people who depend on technology where the senses cannot reach.