A compact ESP32-based dev kit with a built-in E-ink/ePaper display (as well as Wi-Fi, Bluetooth and an onboard lipo battery). Controlled by the ESP32-PICO-D4 this new device includes a 200x200 1.54" Black and White E-Ink Display. Compared to a regular LCD E-ink displays are easier on the eyes, which makes them a great choice for reading or viewing for longer periods. Other benefits are low power consumption and the ability to retain the image even if power to the display is lost. For control, the CoreInk integrates a multi-function button, a physical button, integrated status LED and buzzer. The device also includes a 390mAh Lipo RTC (BM8563) for controlling accurate timing and deep sleep functionality. CoreInk features independent reset and power buttons, expansion ports (HY2.0-4P, M-BUS, HAT expansion) for attaching external sensors to expand functionality for unlimited possibilities。 Warning: Please avoid using high refresh rates, recommended refresh rate is 15s/per refresh. Do not expose to ultraviolet rays for a long time, otherwise, it may cause irreversible damage to the ink screen. 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 * ESP32 Standard wireless functions WiFi, Bluetooth * Internal 4M Flash * Low Power Display * 180-degree viewing angle * Expansion ports * Built-in Magnet * Internal Battery * Expandable Package Contents * 1x CoreInk * 1x Type-C USB(20cm) Application * IoT Terminal * E-Book * Industrial Control Panel * Electronic Tag Specification Resource Parameter ESP32-PICO-D4 240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth Flash 4MB Flash Input Voltage 5V @ 500mA Ports TypeC*1, HY2.0-4P*1 , M-BUS Female Connector，Pin Array/ Hat Expansion Screen GDEW0154M09 | SPI Port | 200*200@1.54" | Dpi:184 | 1-bit Black & White(Grayscale：2) | Viewing Area(mm)：27.6x27.6 | Dot pitch(mm) 0.138x0.138 | Refresh Time（s） 0.82 /Partial refresh（s） 0.24 Physical Buttons Programmable *1 ， Reset *1， Power *1 LED Green LED x 1 RTC BM8563 Buzzer Passive Buzzer*1 Wifi 2.4G 3D Antenna PINS G25, G26, G36, G23, G34, G18, G21, G22, G14, G13 Battery 390mAh@3.7V Working Temp 32°F to 104°F ( 0°C to 40°C ) Net Weight 32g Gross Weight 55g Dimensions 56*40*16mm Package Size 82*46*20mm Case Material Plastic ( PC ) Documents * Tutorialampquick-start * Includes * Application * Easyloader * Pin-mapping * Coreink-hy20-4p-port * Esp32-adcdac-mappable-pins * Related-link * Schematic https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2023-03-07 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2023-12-27 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2024-04-25 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2024-09-19 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2024-11-29 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2024-11-30 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2025-04-29 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2025-09-30 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2025-11-28 https://elecena.pl/product/22722997/m5stack-esp32-core-ink-development-kit-1-54-elnk-display 2025-11-29