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

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.

SKU:US31209555 Category: electronic components

Description