Description 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 with OTG support, 1 Grove port, a [email protected] header with 4 GPIOs, and built-in peripherals such as 1 PDM microphone, 1 infrared emitter, and 1 programmable RGB LED. It can be used in scenarios such as IoT human-computer interaction, voice input/recognition (STT), and IO control. Features ESP32-S3FN8@240MHz, dual-core Xtensa LX7 Built-in 2.4 GHz Wi-Fi USB Type-A interface with USB OTG support Integrated programmable RGB LED and button Built-in infrared emitter Built-in PDM microphone Expandable pins and Grove interface Supports UiFlow2, Arduino IDE, ESP-IDF, and PlatformIO development Specifications Specification Parameter SoC ESP32-S3FN8@Dual-core Xtensa LX7, 240MHz USB USB OTG, USB Serial/JTAG Wi-Fi 2.4 GHz Wi-Fi CDC Supported Microphone SPM1423 Interface USB Type-A Grove Interface PORT.A 2.54-6P Interface GND/VIN_5V/G14/G17/G42/G40 Microphone Sensitivity 94dB SPL@1KHz Typical: -22dBFS Microphone SNR 94dB SPL@1KHz, A-weighted Typical: 61.4dB Supported Input Sound Frequency 100Hz ~ 10KHz Supported PDM Clock Frequency 1.0 ~ 3.25MHz RGB Light WS2812 Product Size 53.0 x 20.0 x 10.3mm Product Weight 8.5g Package Size 114.2 x 65.6 x 20.6mm Gross Weight 16.3g Interface USB Type-A interface supports USB OTG and USB Serial/JTAG Grove interface uses PORT.A [email protected] header provides expandable GPIO access Built-in peripherals include PDM microphone, infrared emitter, programmable RGB LED, and button Applications IoT controller Voice recording Cloud STT recognition Human-computer interaction projects IO control applications Product List 1 x AtomS3U Other Content AtomS3U can be programmed through UiFlow2, Arduino IDE, ESP-IDF, and PlatformIO. Its USB flash drive-shaped form factor and USB Type-A connector make it suitable for compact USB-connected IoT and voice interaction projects. Resources Official Documentation AtomS3U Schematics PDF SPM1423 Datasheet AtomS3U Arduino Test Example AtomS3U UiFlow2 Quick Start FAQ What chip does AtomS3U use? AtomS3U uses the ESP32-S3FN8 chip with a dual-core Xtensa LX7 processor running at 240MHz. Does AtomS3U support Wi-Fi? Yes. AtomS3U supports 2.4 GHz Wi-Fi. What USB interface does AtomS3U use? AtomS3U uses a USB Type-A interface and supports USB OTG and USB Serial/JTAG. Does AtomS3U include a microphone? Yes. AtomS3U includes an SPM1423 PDM microphone. What development platforms are supported? AtomS3U supports UiFlow2, Arduino IDE, ESP-IDF, and PlatformIO. What is included in the package? The package includes 1 x AtomS3U.
