AtomS3U is a USB flash drive-shaped multifunctional development board featuring the ESP32-S3 chip from Espressif. It has a dual-core Xtensa LX7 processor with a main frequency of 240 MHz and built-in Wi-Fi functionality. Its interfaces include a USB Type-A port (supports OTG), 1 Grove port, a 6Pin@2.54mm header (including 4 GPIOs), and peripherals such as 1 PDM microphone, 1 infrared emitter, and 1 programmable RGB-LED. This product can be used in scenarios such as IoT human-computer interaction, voice input/recognition (STT), and IO control.