# M5Stack AtomS3 Lite

> Ultra-compact ESP32-S3 dev board (24x24mm) by M5Stack without display. Features WiFi, BLE 5.0, 8MB flash, Grove port, RGB LED, button, and USB-C in a tiny enclosure for IoT and embedded projects.

## Quick Facts

- **Brand:** M5Stack
- **Board Type:** dev-board
- **Price:** ~$9.45
- **Product Readiness:** developer
- **CPU:** ESP32-S3
- **CPU Architecture:** Xtensa LX7
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **Flash:** 8MB
- **USB:** USB-C
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Antenna:** Built-in PCB antenna

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Compatible Firmware

esp-idf, arduino, esphome, micropython

## Use Cases

- iot-prototyping
- sensor-node
- esphome-node
- wearable

## Components

- **WS2812B** (LED): Single WS2812 addressable RGB LED for status indication and visual feedback — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812.pdf&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **Programmable Button** (Button): Single programmable tactile button for user input and reset functionality — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **USB-C** (Connector): USB Type-C connector for power supply and serial programming/debugging — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- **Grove Port** (Connector): Standard Grove port for connecting I2C sensors and actuators from the M5Stack and Seeed ecosystem — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.seeedstudio.com%2FGrove_System%2F&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**

## Description

# M5Stack AtomS3 Lite

The M5Stack AtomS3 Lite is an ultra-compact development board based on the ESP32-S3 (ESP32-S3FN8) microcontroller. Measuring just 24x24mm, it packs serious capability into a tiny form factor — without a display, keeping costs down and power consumption minimal.

## Key Features

- **ESP32-S3** dual-core Xtensa LX7 processor at 240MHz
- **8MB Flash** for ample firmware and data storage
- **WiFi 802.11 b/g/n** (2.4GHz) + **Bluetooth LE 5.0**
- **Ultra-compact 24x24mm** form factor
- **Grove port** for easy sensor and actuator connectivity
- **USB-C** for power and programming
- **1x RGB LED** (WS2812) for status indication
- **1x Programmable button** for user input
- **6x GPIO** pins exposed for expansion

## Design Philosophy

The AtomS3 Lite strips away the display found on the AtomS3, resulting in a lower-cost, lower-power variant that's ideal for headless IoT deployments. The Grove connector makes it easy to add sensors, displays, or other peripherals from the M5Stack ecosystem.

## Use Cases

- IoT sensor nodes and data loggers
- ESPHome-based home automation nodes
- Wearable prototyping
- Compact embedded controllers
- Edge computing nodes

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fm5stack-atoms3-lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export) — $9.45
- [M5Stack Official](https://openhardware.directory/r?to=https%3A%2F%2Fshop.m5stack.com%2Fproducts%2Fatoms3-lite-esp32s3-dev-kit&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export) — $7.50

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.m5stack.com%2Fen%2Fcore%2FAtomS3%2520Lite&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fm5stack%2FM5AtomS3&ref=openhardware.directory&product=m5stack-atoms3-lite&source=md-export)

## Tags

`esp32-s3`, `m5stack`, `atom`, `ble`, `wifi`, `grove`, `iot`, `compact`, `esphome`

## Images

![M5Stack AtomS3 Lite](https://nbg1.your-objectstorage.com/openhardware-directory/entities/m5stack-atoms3-lite/ebf0e26334f1.webp)

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