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

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