SMART HOME AUTOMATION WITH INTEGRATED SAFETY AND SECURITY USING STM32 AND WI-FI MODULE

Abstract: This paper presents a smart home automation system designed using the STM32F103C8T6 microcontroller and ESP8266 Wi-Fi module for efficient monitoring and control of household appliances. The system integrates multiple sensors such as an LDR for automatic lighting control, an MQ-2 gas sensor for gas leakage detection, and a DHT11 temperature and humidity sensor for monitoring ambient temperature. A 3.4 V lithium-ion battery and dual power supply units are used to distribute power to components including IR sensors, a servo motor, and other modules. The LDR detects day and night conditions and automatically controls lighting through a relay based on programmed threshold values in the microcontroller. The MQ-2 sensor identifies gas leakage and provides an alert indication, while the DHT11 sensor activates an air- conditioning relay when the temperature exceeds a predefined threshold. Additionally, two IR sensors and a servo motor are used to implement an automatic door system that opens when a person approaches and closes after passing through. A capacitive touch module is also included to allow manual door operation for safety. The proposed system provides a low- cost, efficient, and intelligent solution for home automation, improving convenience, safety, and energy management.

Keywords: Smart Home Automation, STM32F103C8T6 microcontroller, ESP8266 Wi-Fi module, MQ-2 gas sensor, DHT11 temperature and humidity sensor, LDR Sensor, IR Sensor, Servo Motor, Gas Leakage Detection, Temperature Monitoring, Automatic Door System, IoT-based Monitoring, Energy Management.