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Small rectangular 4.2 inch e-ink display board with gold edge connector and matte screen

LORDWORLD

LORDWORLD 4.2inch E-Ink Display Module 400x300 SPI development board

SKU CH-8W18-29C4X

A 4.2 inch e-paper module with 400x300 resolution and SPI interface for Raspberry Pi, Arduino, STM32 and Jetson Nano

  • Ultra-low power draw — only needed when refreshing
  • Retains image without power — no backlight required
  • SPI interface with onboard voltage translator for 3.3 V and 5 V MCUs
  • 400 × 300 resolution on a 4.2 inch panel
  • Development resources included for Raspberry Pi, Jetson Nano, Arduino and STM32

4.2 inch E-Ink development board

The LORDWORLD 4.2inch E-Ink Display Module is a development board with a 400x300 resolution screen. It connects via SPI and includes an onboard voltage translator for 3.3V and 5V logic compatibility. The board targets makers and engineers building low-power IoT edge devices with Raspberry Pi, Arduino, Nucleo or Jetson Nano platforms. Development resources and manuals are supplied for these controller boards.

Ultra-low power consumption and no backlight

The e-paper technology draws power only during a refresh cycle, making it ultra-low consumption for battery-operated projects. With no backlight, the display retains the last shown content indefinitely even when power is completely removed. This behaviour suits applications requiring persistent readouts without continuous energy draw. The SPI interface keeps wiring simple for supported microcontrollers.

Sustained operation with static content

Under sustained load the module excels at showing static information for extended periods without active power. Refresh cycles remain the only moments of measurable current draw, so thermal output and noise stay negligible. The board is not designed for video-rate updates or animations, limiting its use to slow-changing data such as sensor logs, price tags or status panels. Buyers needing high frame rates or colour output should consider alternative display technologies.

Highlights

  • Ultra-low power draw — only needed when refreshing
  • Retains image without power — no backlight required
  • SPI interface with onboard voltage translator for 3.3 V and 5 V MCUs
  • 400 × 300 resolution on a 4.2 inch panel
  • Development resources included for Raspberry Pi, Jetson Nano, Arduino and STM32

Specifications

BrandLORDWORLD

Questions about this item

How do I wire the 4.2inch E-Ink display to a Raspberry Pi using the SPI interface?

Connect the module to the Pi SPI pins; the onboard voltage translator handles 3.3V and 5V logic so no external level shifter is needed.

What maintenance does the 400x300 E-Paper screen require over time?

No backlight or moving parts exist; only occasional refresh cycles are needed to prevent ghosting, and the panel retains its last image without power.

At what refresh rate does the 4.2inch module show its limit during sustained updates?

Full-screen refreshes take several seconds each, so rapid animations or video playback are not practical; the hardware is designed for infrequent static updates.

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