Design and Implementation of KitchenGuard: A Multi-Sensor IoT Framework for Robust Kitchen Hazard Mitigation with Edge-Cloud Actuation

KitchenGuard is an inexpensive multi-sensor IoT solution for combustible-gas, smoke, thermal and flame detection in the home kitchen. The ESP32 edge controller conducts local sensing, perform hazard fusion and actuate without relying on cloud connectivity and cloud dashboard offers remote visibility. The prototype involves the integration of MQ-series gas/air-quality sensors, temperature-humidity sensing, infrared flame detection, solenoid valve, exhaust fan, water pump, buzzer, and, local display. A normalized Kitchen Hazard Index includes sensor characteristics, flame and extreme gas are hard over-ride conditions. Experimental testing revealed that the temperature dropped from 35.0°C to 32.1°C within 12.2 min after the fan was turned on. The spatial gradient was clearly evident in the gas placement readings: 4095 at the source, 3728 below the cooker, 3191 above the cooker, and ~1690 at both corners three feet away. Project records show hazard response time of 1.65-s, gas isolation time of 1.9-s, successful telemetry over 72 h, and cost of less than US$65, but these are not event by event claims and need to be independently verified. The results show that edge based multi-sensor detection, edge based local mitigation and cloud-based observability are feasible as proof-of-concept. In order to validate, sensor calibration, repeated trials, fault testing and standards-based safety assessment must be performed prior to deployment.