MQTT-Based Internet of Things Smart Home Linkage Control System

The core architecture of the system designed in this paper is based on STM32 micro-controller, integrated with DHT11 temperature and humidity sensor, BH1750 light intensity detector and other components, and utilizes the integrated Wi-Fi module of ESP8266 to communicate with AliCloud IoT platform. The system uses the MQTT protocol to send data to the platform, and through the developed WeChat applet, combined with AliCloud's cloud product streaming function, the data is transmitted to the mobile terminal to realize the remote data storage function. In addition, the system also embeds the SG90 servo drive unit as an analog component of the robotic arm operating system, and collaborates with the ESP32-CAM remote video monitoring device to realize all-round detection and control, providing convenience for people's lives.