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 M5Stack CoreInk 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. Lithium Battery Shipping: Due to courier restrictions, this product can only be shipped within the United Kingdom. With this item in your cart, your shipping options will be limited and may cost more than our usual rates. Why? 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. Resources * Product Documentation Package Contents * 1x M5Stack CoreInk https://elecena.pl/product/22722997/m5stack-coreink 2023-03-07 https://elecena.pl/product/22722997/m5stack-coreink 2023-12-27 https://elecena.pl/product/22722997/m5stack-coreink 2024-04-25 https://elecena.pl/product/22722997/m5stack-coreink 2024-09-19 https://elecena.pl/product/22722997/m5stack-coreink 2024-11-29 https://elecena.pl/product/22722997/m5stack-coreink 2024-11-30 https://elecena.pl/product/22722997/m5stack-coreink 2025-04-29 https://elecena.pl/product/22722997/m5stack-coreink 2025-09-30 https://elecena.pl/product/22722997/m5stack-coreink 2025-11-28 https://elecena.pl/product/22722997/m5stack-coreink 2025-11-29