Description

The M5Stack AtomS3 Lite is a compact programmable controller built around the ESP32-S3FN8. Measuring only 24.0 x 24.0 x 9.5mm, it combines 8MB SPI flash, Wi-Fi, a built-in 3D antenna, USB Type-C programming, an RGB status LED, an IR transmitter, a programmable button, and a HY2.0-4P expansion interface.

This AtomS3 Lite development kit is designed for small IoT nodes, embedded controllers, rapid prototypes, and smart-device projects that need a tiny ESP32-S3 controller with convenient expansion pins and mounting options.

Notice: To flash firmware, press and hold the reset button for about 2 seconds until the internal green LED lights up, then release it to enter download mode.

Features

• ESP32-S3FN8 controller with 8MB SPI flash and integrated Wi-Fi.
• USB Type-C port for program download and serial communication.
• Programmable button, RGB status LED, and infrared transmitter.
• HY2.0-4P interface plus six GPIO female headers for expansion.
• 5V to 3.3V power circuit with 3.3V output.
• M2 rear screw hole for compact mounting in embedded projects.
• Supports UIFlow2, Arduino IDE, ESP-IDF, and PlatformIO workflows.

Specifications

Applications

• Compact IoT sensor and control nodes
• Microcontroller learning and prototyping
• Infrared remote control projects
• Smart home device prototypes
• USB-C programmable embedded controllers

Product List

Other Content

The AtomS3 Lite exposes a HY2.0-4P port for quick peripheral wiring. The port maps black to GND, red to 5V, yellow to G2, and white to G1.

Use this AtomS3 Lite when a project needs a small ESP32-S3 board with USB programming, GPIO expansion, and onboard indicators in a very compact enclosure.

Resources

• AtomS3-Lite Product Documentation
• AtomS3-Lite Schematics PDF
• AtomS3-Lite Structure Files
• ESP32-S3 Datasheet
• SY8089 Datasheet
• AtomS3-Lite Arduino Quick Start
• AtomS3-Lite Arduino Library
• AtomS3-Lite UIFlow2 Quick Start
• AtomS3-Lite Factory Firmware EasyLoader

FAQ

What controller does the M5Stack AtomS3 Lite use?

It uses the ESP32-S3FN8 controller with 8MB SPI flash.

How do I enter download mode?

Hold the reset button for about 2 seconds until the internal green LED lights up, then release it.

Which development platforms are supported?

The AtomS3 Lite supports UIFlow2, Arduino IDE, ESP-IDF, and PlatformIO workflows.