Waveshare

Waveshare 250x122, 2.13inch E-Ink Display HAT For Raspberry Pi, with SPI Interface

$31.45

Quantity

This is an E-Ink display HAT for Raspberry Pi, 2.13inch, 250x122 resolution, with embedded controller, communicating via the SPI interface. This E-Ink display and HAT supports partial screen refreshes, to speed up screen updates.

This is version 2 display is also the recommended low-power display for the Pwnagotch i, and can be configured as the waveshare_2 device.

Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on.

Features

No backlight, keeps displaying last content for a long time even when powered down
Ultra low power consumption - basically, power is only required for refreshing or changing display contents
Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
SPI interface, for connecting with other controller boards like Arduino/Nucleo, etc.
Onboard voltage translator, compatible with 3.3V/5V MCUs
Comes with development resources and manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32)

Specifications

Operating voltage: 3.3V/5V
Interface: SPI
Outline dimension: 65mm × 30.2mm
Display size: 23.71mm × 48.55mm
Dot pitch: 0.194 × 0.194
Resolution: 250 × 122
Display color: black, white
Grey level: 2
Partial refresh time: 0.3s
Full refresh time: 2s
Refresh power: 26.4mW(typ.)
Standby power: <0.017mW
Viewing angle: >170°

Interface

SYMBOL	DESCRIPTION
VCC	3.3V/5V
GND	Ground
NC	NC
DIN	SPI MOSI pin
CLK	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, high active

Dimensions

Development Resources

Wiki : www.waveshare.com/wiki/2.13inch_e-Paper_HAT

A great introduction to e-paper displays

Originally got this for a pwnagotchi. Turns out to be easily programmable. With a raspberry pi 0w, it is low profile enough to be a hacker's smartwatch. Drawing speed is on par with other epaper displays at roughly 1frame/sec, with some ghosting to be expected, but a full screen refresh can clear all ghosting effects. Occasionally there would be a grey background instead of white, although that was when the device was powering down so I suspect this would have to do with residual charge rather than the screen itself. Despite it not as bug-free as the displays found on other ebook readers, it has a high reliability rate for drawing when used as a smartwatch display, and its interface is easy to program. So far I've used C and Python. A must-have for anyone with an RPi.