The M5Stack CoreInk combines an ESP32-PICO-D4 controller with a 1.54" low-power E-Ink display, offering an ideal platform for portable IoT dashboards, status displays, and battery-efficient embedded projects.
The M5StackCoreInk is a main control device with an E-Ink display launched by M5Stack, using the ESP32-PICO-D4 controller.
The front is embedded with a 1.54" E-Ink display with a resolution of 200x200, supporting black/white display. Compared to ordinary LCD screens, the E-Ink display provides a better text reading experience, with features such as low power consumption and image retention when powered off.
For human-machine interaction, it offers a rotary switch and physical buttons, integrated LED indicator, and buzzer. It has a built-in 390mAh lithium battery, combined with an internal RTC (BM8563) to achieve timed sleep and wake-up functions, providing excellent battery life.
There are independent power and reset (RST) buttons on the left side and bottom of the device, making it easy to use and debug. It offers a variety of peripheral interfaces (HY2.0-4P, M5-Bus, HAT module interface) to expand various sensor devices, providing infinite possibilities for subsequent application development.
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Features
Developed based on ESP32, supports WiFi
Built-in 4M Flash
Low power consumption display panel
Nearly 180-degree viewing angle
Human-machine interaction interface
Magnetic back design
Built-in lithium battery
Rich expansion interfaces
Development Platform
UiFlow1
UiFlow2
Arduino IDE
ESP-IDF
PlatformIO
Specifications
SoC
ESP32-PICO-D4 @ Dual-core processor, 240MHz main frequency
DMIPS
600
SRAM
520KB
Flash
4MB
Wi-Fi
2.4 GHz Wi-Fi
Input Voltage
5V @ 500mA
Interface
USB Type-C x 1, HY2.0-4P x 1, M5-Bus female connector, top HAT expansion interface
E-ink Screen
GDEW0154M09, SPI interface, 200 x 200@1.54", Dpi:184, 1-bit black/white display (Grayscale: 2), Viewing area size (mm): 27.6 x 27.6, Dot pitch (mm): 0.138 x 0.138, Refresh time (s): 0.82, Partial refresh time (s): 0.24
Physical Button
Programmable button x 1, reset button x 1, power button x 1
LED
Green LED x 1
RTC
BM8563
Buzzer
Passive buzzer * 1
Antenna
2.4G 3D antenna
Pin breakout
G25, G26, G36, G23, G34, G18, G21, G22, G14, G13
Battery
390mAh@3.7V
Operating Temperature
0 ~ 60°C
Case Material
Plastic ( PC )
Product Size
56.0 x 40.0 x 16.0mm
Product Weight
31.5g
Important Information
When using, please avoid high-frequency refreshing for a long time. It is recommended to refresh at intervals of (15s/refresh).
Do not expose to ultraviolet light for a long time, as this may cause irreversible damage to the E-Ink display.
CoreInk uses a low-power power management scheme different from CORE and StickC devices.
When using, the PWR button is used as the power-on button (long press for 2s). To shut down the device, you need to use the software API or press the reset button on the back.
