Inky wHAT (ePaper/eInk/EPD) Red/Black/White
Really cool, nice resolution for the price
Ryan Cotter
Little Bird
Inky wHAT (ePaper/eInk/EPD) Red/Black/White
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Pimoroni
$130.25
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Inky wHAT is a 4.2" e-paper display HAT for Raspberry Pi, capable of showing red, black, and white. The EPD display is crisp and readable in bright sunlight,...
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Inky wHAT is a 4.2" e-paper display HAT for Raspberry Pi, capable of showing red, black, and white. The EPD display is crisp and readable in bright sunlight, making it perfect for information displays that don't need frequent updates.
The display uses electrophoresis to pull coloured particles into position, reflecting ambient light rather than emitting it. Everything comes fully assembled with no soldering required — just attach to your Pi and run the one-line installer.
Key Features
- 4.2" EPD Display – 400×300 pixels, red/black/white
- Sunlight Readable – Reflective display, no backlight needed
- Fully Assembled – No soldering required, display pre-attached via ribbon cable
- Breakout Pins – I2C and SPI broken out on the back for additional devices
- 40-Pin Header Included – Female header to boost height for full-size Pi models
- Standoffs Included – Secure mounting to your Pi
- Python Library – One-line installer with examples included
Specifications
- Display Size – 4.2" diagonal
- Resolution – 400 × 300 pixels
- Usable Area – 84.8 × 63.6 mm
- Overall Dimensions – 91 × 77 × 8.5 mm (W×H×D, includes header and display)
- Refresh Time – ~25 seconds (3-colour mode), ~2 seconds (black & white mode)
- Compatibility – All 40-pin Raspberry Pi models including Pi Zero and Pi Zero W
Note: The display is made from glass — handle carefully at the edges and avoid pressing on the surface. You can use 3-colour displays in black-and-white mode for much faster refresh times (~2 seconds).
Ideal For
- Weather displays and dashboards
- Calendars and to-do lists
- Daily news or information boards
- DIY e-readers
Package Contents
- 1× Inky wHAT (Red/Black/White) with 40-pin header and standoffs
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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