Inky wHAT (ePaper/eInk/EPD) Yellow/Black/White

A large 4.2" three-colour e-paper display HAT for Raspberry Pi, showing crisp yellow, black, and white graphics that remain visible even in bright sunlight. The generous 400×300 pixel resolution provides ample space for dashboards, calendars, and information displays.

E-paper displays use electrophoresis to move coloured particles, reflecting ambient light rather than emitting it. This means ultra-low power consumption and excellent readability outdoors. Comes fully assembled with no soldering required.

Key Features

• 4.2" E-Paper Display – 400×300 pixel resolution in yellow/black/white
• Sunlight Readable – Reflective display visible in bright conditions
• Ultra Low Power – Only draws power during refresh
• Fully Assembled – No soldering required
• Breakout Pins – I2C and SPI broken out for additional devices
• Mounting Hardware – Standoffs included for secure attachment
• Python Library – Easy-to-use software with examples

Ideal For

• Weather displays and dashboards
• Calendars and to-do lists
• Daily news and information boards
• DIY e-readers
• Low-power signage

Specifications

• Display Size: 4.2" diagonal
• Resolution: 400×300 pixels
• Colours: Yellow, black, white
• Refresh Time: ~25 seconds (full colour), ~2 seconds (black/white mode)
• Usable Area: 84.8 × 63.6mm
• Board Dimensions: 91 × 77 × 8.5mm
• Interface: SPI
• Compatibility: All 40-pin Raspberry Pi models including Pi Zero

Package Contents

• 1× Inky wHAT e-paper display (fully assembled)
• 1× 40-pin female header (for height boost)
• 1× Standoff mounting kit