Design and implementation of smart home security system based on STM32

Abstract

With the rapid development of smart home and IoT technology, traditional home security products have defects such as high deployment cost, low detection accuracy, poor intelligence and single functional linkage, which cannot meet users’ all-round real-time protection needs. This paper designs a smart home security system with STM32F103C8T6 as the core, integrating MQ-2, DHT11, flame sensor, HCSR501, ESP8266 WIFI module and self-developed Android APP. The system realizes real-time environmental monitoring, automatic peripheral linkage, multi-channel abnormal alarm and two-way remote data interaction. Test results show the maximum sensor response time is ≤10s (average 4.5s), ESP8266 end-to-end transmission delay ≤80ms. The Android APP supports real-time data display, remote threshold customization and one-key device control. The system features low cost, high detection accuracy, high intelligence and simple operation, with good practical and promotional value.