Design of intelligent express storage cabinet based on STM32 microcontroller

With the rapid development of e-commerce, traditional express lockers are no longer able to meet the needs of modern consumers in terms of convenience and security. This article designs an intelligent express storage cabinet system based on STM32 microcontroller to improve the security and user experience of express access. The system uses STM32F103C8T6 as the core controller and integrates GSM module to achieve SMS notification function during express access, allowing users to retrieve packages through mobile verification codes without the need for paper credentials. The system hardware design includes modules such as reset circuit, clock circuit, 4 × 4 matrix keyboard, OLED display module, intelligent voice broadcast system, and LED status indicator light. The software development uses KEIL5 to write the program, and the program is burned into the microcontroller through Stcisp. The test results show that the system can accurately recognize mobile phone numbers and send text messages. Users can safely and quickly open the cabinet door with the verification code received by their mobile phones.