M5Stack-CoreInk

Development Board

Code name: M5Stack_CoreInk

ESP32 M5STACK

M5Stack-CoreInk is a development board based on the ESP32 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.

About M5Stack-CoreInk

ESP32-based e-paper display with battery and IMU - designed for always-on status dashboards and low-power UIs.

Technical Specifications

Complete technical specification details for M5Stack-CoreInk

Display

Type ePaper

Size 1.54"

Resolution 200x200

Driver GDEW0154M09

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 4.2

BLE 4.2

Microcontroller

Model esp32

Clock Speed 240 MHz

Flash Size 4MB

SRAM 520KB

Architecture xtensa

✨ Features & Pins

Digital IO 40

Analog Input 16

PWM 18

Interrupts 16

Quick Setup

Copy-paste configs for M5Stack-CoreInk - auto‑generated from this board's exact hardware specs.

ESP32 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select M5stack Coreink from the esp32 by Espressif package. In PlatformIO use board = esp32dev. ESP32 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) M5stack Coreink

CPU Frequency 240 MHz

Flash Size 4MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "M5stack Coreink" for the M5Stack-CoreInk.

platformio.ini


[env:m5stack-coreink]
platform  = espressif32
board     = esp32dev
framework = arduino

; Exact hardware config for M5Stack-CoreInk
board_build.mcu        = esp32
board_build.f_cpu      = 240000000L
board_build.flash_size = 4MB
board_build.flash_mode = dio
board_upload.flash_size = 4MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32dev
  framework:
    type: arduino   # or "esp-idf"

# M5Stack-CoreInk - 240 MHz ESP32
# Flash: 4MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 4MB \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

Useful Links

Datasheets and resources for M5Stack-CoreInk

ESP32 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for M5Stack-CoreInk

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	PWM	Other
1	PWM	TX
2	PWM	G2
3	PWM	RX
5	PWM	G5
9	PWM	SS
10	PWM	G10
12	PWM	G12
13	PWM	RX2 G13
14	PWM	TX2 G14
18	PWM	SCK
19	PWM	G19
21	PWM	G21
22	PWM	G22
23	PWM	MOSI
25	PWM	G25 DAC1
26	PWM	G26 DAC2
32	PWM	SDA G32
33	PWM	SCL G33
34		MISO
35		ADC1
36		G36 ADC2
37		G37
38		G38
39		G39

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for M5Stack-CoreInk

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	dio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)