CoreS3

SKU:K128

Description

CoreS3 is the third-generation main controller of the M5Stack development-kit series, based on the ESP32-S3 solution featuring a dual-core Xtensa LX7 processor running at 240 MHz with built-in Wi-Fi. It integrates 16 MB Flash and 8 MB PSRAM. Programs can be downloaded through the Type-C port, and OTG & CDC functions are supported for connecting USB devices and flashing firmware.

The front houses a 2.0-inch capacitive-touch IPS panel protected by high-strength glass. Below the screen is a 0.3 MP GC0308 camera paired with an LTR-553ALS-WA proximity sensor. Power is managed by an AXP2101 PMU and four power-path control circuits, delivering a low-power design. Onboard sensors include a six-axis IMU BMI270 and a magnetometer BMM150. Additional peripherals comprise a TF-card (microSD) slot and a BM8563 RTC, enabling precise time-keeping plus sleep/timed-wake-up functions.

For audio, a 16-bit I2S amplifier AW88298 drives the built-in 1 W speaker, while an ES7210 audio codec provides dual-microphone input. Independent POWER and RESET (RST) buttons are located on the side; long-pressing the RESET button enters download mode via a self-built delay circuit.

The kit ships with a DinBase for DIN-rail, wall-mount or screw mounting. It can be powered by an external DC 12 V (9 ~ 24 V) supply or an internal 500 mAh Li-ion battery. Multiple proto areas on the DinBase ease DIY expansion.

Ideal for IoT development, DIY projects, smart-home control systems and industrial automation control systems.

Tutorial

Arduino IDE

Arduino IDE

This tutorial explains how to program and control CoreS3 using Arduino IDE.

UiFlow2

UiFlow2

This tutorial shows how to control CoreS3 via the UiFlow2 graphical programming platform.

Home Assistant

Home Assistant

This tutorial describes how to connect CoreS3 to Home Assistant.

Features

• ESP32-based development, Wi-Fi, 16 MB Flash, 8 MB PSRAM
• Built-in camera, proximity sensor, speaker, power-indicator LED, RTC, I2S amplifier, dual microphones, capacitive touch screen, power button, reset button, gyroscope
• TF-card slot
• High-strength glass panel
• Supports OTG & CDC functions
• AXP2101 power management, low-power design
• Development Platform
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • PlatformIO

Includes

• 1 × CoreS3
• 1 × DinBase
• 1 × Hex Key L-Shape 2.5 mm (For M3 Screw)
• 4 × Screw Buckle
• 1 × Rail-mount Base Buckle

Applications

• IoT development
• DIY project development
• Smart-home control systems
• Industrial automation control systems

Specifications

Learn

Download Mode

Long-press the RESET button for 3 s (green LED on) to enter download mode before flashing firmware.

Power On/Off

• Power-on: single-click the left POWER button
• Power-off: long-press the left POWER button for 6 s
• Reset: single-click the bottom RST button

Power Management

CoreS3 uses the AXP2101 PMU. Configure power input/output according to the diagram below; refer to M5Unified for detailed code examples.

Certifications

• CE/MIC/FCC/SAR

Schematics

• CoreS3 Schematics PDF
• Base DIN Schematics PDF

1/8

PinMap

LCD Screen

LCD resolution: 320 x 240

TF Card

Maximum 16 GB

Camera & Proximity Sensor LTR-553ALS-WA

CAP.TOUCH (I2C Addr: 0x38)

Microphone & Amplifier

AXP Power Indicator LED

RTC

IMU (3-axis Gyro + 3-axis Accel + 3-axis Magnetometer)

Internal I2C

BMM150

HY2.0-4P

CoreS3 M5-Bus Diagram

Core Series PinMap Comparison

Model Size

• Cores3 Model Size DXF

Datasheets

• ESP32-S3
• LTR-553ALS-WA
• GC0308
• ES7210
• BMM150
• BMI270
• BM8563
• AXP2101
• AW88298
• AW9523B

Softwares

Quick Start

• CoreS3 OpenAI Voice Assistant
• CoreS3 XiaoZhi Voice Assistant
• CoreS3 HA Voice Assistant

Arduino

• CoreS3 Arduino Quick Start
• CoreS3 Arduino Library
• CoreS3 Arduino M5Unified Library
• CoreS3 Arduino M5GFX Library

UiFlow2

• CoreS3 UiFlow2 Quick Start
• CoreS3 UiFlow2 Book

PlatformIO

• CoreS3 Factory Firmware

[env:m5stack-cores3]
platform = espressif32@6.7.0
board = esp32-s3-devkitc-1
framework = arduino
upload_speed = 1500000
monitor_speed = 115200
build_flags =
    -DESP32S3
    -DBOARD_HAS_PSRAM
    -mfix-esp32-psram-cache-issue
    -DCORE_DEBUG_LEVEL=5
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1
lib_deps =
    M5Unified=https://github.com/m5stack/M5Unified

ESP-IDF

• Espressif's Board Support Packages – CoreS3
• CoreS3 ESP-IDF BSP Guide

Easyloader

Flash CoreS3 factory firmware with Web Tools

Other

• CoreS3 Restore Factory Firmware Guide

• I2C Address Table

Video

• Get to Know CoreS3

• How to Program with USB in UiFlow2

• Flash UIFLow2x to CoreS3