The safety system for gas stoves plays a crucial role in enhancing household safety, particularly in preventing potential leaks caused by user negligence. This research aims to design and implement a safety system for gas stoves capable of detecting leaks and providing automatic control based on a microcontroller. The automatic control operates in two modes: countdown timer control and manual control via a switch. The system is equipped with a solenoid valve operated by a relay and an Arduino Uno to regulate the gas flow. In addition, an MQ-2 sensor is used to detect gas leaks, while a DHT11 sensor measures temperature and humidity as indicators of the stove’s operating conditions. The measurement data is transmitted in real-time via a Wemos D1 Mini (ESP8266) module to the Blynk application, enabling users to monitor the system directly from a mobile device. Testing results show that the MQ-2 sensor can detect normal air conditions with readings of 0–58 PPM, and experiences a surge from 66 PPM to 168 PPM during simulated leak conditions, indicating high sensitivity. Meanwhile, the DHT11 temperature and humidity sensor operates stably when the stove is off, with temperatures of 29.90–30.00 °C and humidity levels of 73.90–74.10%. When the stove is on, the sensor accurately responds to environmental changes, recording temperature increases from 31.20 °C to 64.20 °C and humidity decreases from 74.60% to 14.10%. These results confirm the accuracy and consistency of readings in monitoring environmental changes caused by heat sources. The countdown timer successfully regulates gas flow automatically and stops it precisely when the set time ends, while the manual switch provides a fast response in activating and deactivating the gas flow. Data transmission
to the Blynk application runs smoothly without interruption. With the integration of timebased control, manual control, and gas sensor monitoring, this system offers an effective and safe solution for household gas stove usage