LaskaKit ESPink-4.26 ESP32-S3 e-Paper

Product detailed description

LaskaKit ESPink-4.26 is a ready-to-use development board featuring an ESP32-S3 and an attached 4.26" ePaper display with a resolution of 800 × 480 px, designed for low-power battery-operated displays. It is programmed via USB-C, which also charges the connected Li-Pol battery, and consumes only around 15.5 μA in deep sleep. The board features two I2C μŠup connectors and one SPI μŠup connector for connecting sensors, a microSD card slot, three user buttons, and a connector with exposed free ESP32-S3 pins. The board supports the Living Image project, which allows you to display photos, calendars (Google, Outlook, Apple), exchange rates, weather station data, or weather forecasts without writing any code.

Some main features and advantages of the ESPink-4.26:

• Ready-to-use solution: the board with display is fully populated and assembled; simply connect the battery and upload your program.
• Large ePaper: 4.26" with 800 × 480 px resolution and partial refresh support; the image is retained even without power.
• Low power consumption: approx. 15.5 μA in deep-sleep and switched power supply for the display and peripherals via GPIO – ideal for long-term battery operation.
• Easy expansion: I2C µSup connectors are compatible with Adafruit Stemma QT and SparkFun Qwiic, allowing you to connect sensors without soldering.
• Living Image: upload the firmware via the web installer – select the LaskaKit ESPink 2.x, 3.5 and 3.6 board and the GDEQ0426T82 display.
• Custom program: you can find the board schematic and sample codes on our GitHub (in the Files tab).

Specifications:

• Board version: v1.4
• Microcontroller: ESP32-S3 (ESP32-S3-WROOM-1-N16R8 module, 16 MB Flash, 8 MB PSRAM), Wi-Fi, Bluetooth LE
• Display: Good Display GDEQ0426T82, 4.26", 800 × 480 px, monochrome, partial refresh
• Supply voltage: 3.7–5.5 V
• Power Supply:
  • USB-C (5 V)
  • Li-Pol battery 3.7 V, JST-PH 2.0 connector
  • battery charging via USB-C (TP4054 charger, indicator LED)
  • switch that disconnects both the board and display from the battery and USB
• Deep-sleep current: approx. 15.5 μA (board with display only, without connected peripherals)
• Programming: via USB-C, CH9102F USB–UART converter
• Connectors and Interfaces:
  • 2× I2C µSup (JST-SH 4pin, compatible with Stemma QT / Qwiic) – SDA IO42, SCL IO2
  • 1× SPI µSup – CS IO46, MOSI IO37, CLK IO14, MISO IO21
  • microSD card slot
  • 1×15 connector with broken-out ESP32-S3 pins
• On-board sensor: SHT40 (temperature, humidity), connected to the same I2C bus as the external sensors
• Buttons: RESET, UP (GPIO39), PUSH (GPIO40), DOWN (GPIO41) – user buttons active LOW
• ePaper pinout (standard for GxEPD2):
  • MOSI/SDI: GPIO11
  • CLK/SCK: GPIO12
  • CS: GPIO10
  • DC: GPIO48
  • RST: GPIO45
  • BUSY: GPIO38
• Peripheral power switching: GPIO47, active HIGH (ePaper, I2C and SPI µSup connectors, SHT40 sensor)
• Battery voltage measurement: voltage divider on IO9, divider ratio 1.769388
• Compatibility: Arduino IDE (GxEPD2 library), ESP-IDF, Living Image
• Suitable batteries:
  • LaskaKit LiPol Battery 654060 2000mAh 3.7V JST-PH 2.0
  • LaskaKit LiPol Battery 604050 1500mAh 3.7V JST-PH 2.0
• Suitable case: LaskaKit case for ESPink-4.26 (3D print)
• Suitable sensors with µSup connector:
  • BME280 (pressure, temperature, humidity)
  • SCD41 (CO2, temperature, humidity)
  • BH1750 (light intensity)
  • APDS-9960 (proximity and gestures)
• Other boards from the ESPink family:
  • LaskaKit ESPink ESP32 e-Paper – standalone board for connecting various ePaper displays
  • LaskaKit ESPink-4.2 ESP32 e-Paper
  • LaskaKit ESPink-Shelf-2.9 ESP32 e-Paper
  • LaskaKit ESPink-Shelf-2.13 ESP32 e-Paper
• Dimensions: approx. 109 × 63 × 8.1 mm
• Weight: 45 g

Package contents:

• 1× LaskaKit ESPink-4.26 ESP32-S3 e-Paper (board with attached display)

Note:

• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.
• Neither the battery nor the case is included in the package. You can 3D print the case using the model on our GitHub or purchase it separately.
• The UP, PUSH, and DOWN user buttons are on GPIO39–41, which are not RTC pins – they will not wake the board from deep sleep. You can wake it using the RESET button or a timer.