A 4.2-inch three-colour ePaper (eInk) display that renders images in black, white, and red on a 400 × 300 pixel matrix. ePaper offers excellent readability from wide viewing angles and even in direct sunlight, with the added benefit of retaining the displayed image with no power applied.

The breakout board includes onboard SRAM and a microSD card slot, so you won't run out of memory when working with images. Supports both 3.3 V and 5 V logic — just power the board at the same voltage as your logic level. The display takes approximately 14 seconds to refresh, making it best suited for applications where content changes infrequently.

Key Features

• Three-Colour Display – Black, white, and red pigments for eye-catching visuals
• 4.2" Screen – 400 × 300 pixel resolution
• Ultra-Low Power – Under 20 mA at startup, under 10 mA running, zero power to retain image
• Onboard SRAM – No need to buffer the full display in microcontroller RAM
• MicroSD Card Slot – Store and load images directly
• 3.3 V / 5 V Compatible – Works with either logic level
• ~14-Second Refresh – Best for infrequently updated content

Ideal For

• Weather stations and environmental monitors
• Smart labels and signage
• Low-power information displays
• IoT dashboards with infrequent updates

Package Contents

• 1× 3-Colour ePaper Display 4.2" Breakout Board

Resources

• SparkFun ePaper Arduino Library (GitHub)