This 3.7" ePaper HAT makes the most of the Raspberry Pi footprint to bring you as much ePaper real-estate for your project as possible, and can display red, yellow, black and white!

The HAT features a 3.7" ePaper display with the panel measuring ~93mm x 53mm, sitting on a full-size PCB with a 40-pin GPIO connector on the rear. The display offers 170° viewing angles, a 416x240 resolution, and can show four colours - red, yellow, black and white.

Refresh time is around 20 seconds for a full refresh, and 12 seconds for a 'fast refresh'. As with all ePaper displays, it uses very little power - <0.01uA (almost nothing) when in standby, and around <30mW when refreshing.

The display is controlled via SPI from the GPIO pins, however you can also use this with 3.3V or 5V dev boards and microcontrollers via the MX1.25 9-pin connector, and a cable assembly is included to help you do this. Waveshare also include standoffs to secure the HAT to your Raspberry Pi.

The online wiki provides sample/demo code in both C and Python for the Raspberry Pi, as well as Arduino/ESP/STM32 examples for other dev boards. Spare raw ePaper panels are available.

Raspberry Pi not included

Features

• 3.7" ePaper HAT for Raspberry Pi
• Four colour: Red, yellow, black and white
• Panel size: ~93mm x 53mm
• 40-pin GPIO connector
• 416x240 resolution
• 170° viewing angle
• Refresh
  • Full refresh time: around 20 seconds
  • Fast refresh time: 12 seconds
• Power
  • Standby current: <0.01uA (almost nothing)
  • Refresh power: around <30mW
• SPI control via GPIO pins
• Compatible with 3.3V or 5V dev boards (using MX1.25 9-pin connector)

Specifications

Operating voltage	Raw display: 3.3V
Operating voltage	with driver board: 3.3V/5V
Display colour	Red/Yellow/Black/White
Interface	3-wire SPI, 4-wire SPI
Grey scale	2
Outline dimensions	Raw display: 92.99 × 53.00 × 1.00 (mm)
Outline dimensions	with driver board: 96.00 × 57.00 (mm)
Fast refresh time	12s
Full refresh time	20s
Display size	81.54 × 47.04 (mm)
Refresh power	<30mW
Dot pitch	0.196 × 0.196 (mm)
Standby current	<0.01uA (almost none)
Resolution	416 × 240 pixels
Viewing angle	>170°

Resources

Demo code, schematics, datasheets and more are available over on the product wiki:

• Product Wiki

Pinout

VCC	Power (3.3V / 5V input)
GND	Ground
DIN	SPI MOSI pin
SCLK	SPI SCK pin
CS	SPI chip selection, low active
DC	Data/command selection (high for data, low for command)
RST	External reset, low active
BUSY	Busy status output pin
PWR	Power on/off control

Package Contents

• 1x 3.7" ePaper HAT (G) for Raspberry Pi
• 1x MX1.25 9-pin cable assembly
• 1x Fixings and standoffs pack

Raspberry Pi not included