AtomS3U ESP32S3 Development Kit with USB-A M5STACK

The AtomS3U is a compact M5Stack development module based on the ESP32-S3 microcontroller, designed in a small U-shaped form factor. It features an ESP32-S3FN8 chip running at 240 MHz, Wi-Fi connectivity, and a native USB-A port supporting OTG and CDC (Virtual COM Port) communication.

This kit includes an SPM1423 digital microphone for audio capture, a WS2812 RGB LED, and a built-in infrared emitter. It provides a Grove PORTA interface and exposed pins (GND, VIN 5V, G14, G17, G42, G40) for expansion. Compatible with Arduino and MicroPython.

Specifications

• MCU : ESP32-S3FN8 (Xtensa LX7 dual-core, 240 MHz)
• Connectivity : Wi-Fi, USB-A (OTG, CDC)
• Audio : SPM1423 Microphone (sensitivity -22dBFS, SNR 61.4dB, frequency range 100Hz-10kHz)
• LEDs : Integrated WS2812 RGB
• Interfaces : Grove PORTA, 2.54mm 6-pin connector (GND/VIN_5V/G14/G17/G42/G40)
• Built-in infrared emitter
• Product dimensions : 52 x 20 x 10 mm
• Weight : 8.4 g

Includes

• 1x AtomS3U Module

Documentation and tutorials are available on the M5Stack website.