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{{Infobox item
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{{#tweekihide:firstHeading|sidebar-left|sidebar-right}}__NOTOC__
|name=2.7inch e-Paper (B)
 
|name2=2.7inch e-Paper HAT (B)
 
|img=[[File:2.7inch-e-Paper-B-1.jpg|300px|link=https://www.waveshare.com/2.7inch-e-Paper-B.htm]]
 
|img2=[[File:2.7inch-e-paper-hat-b-4.jpg|300px|link=http://www.waveshare.com/2.7inch-e-paper-hat-b.htm]]
 
|caption=264x176, 2.7inch EPD panel
 
|caption2=264x176, 2.7inch EPD HAT for Raspberry Pi, three-color
 
|category=[[:Category:OLEDs / LCDs|OLEDs / LCDs]], [[:Category:LCD|LCD]]
 
|brand=Waveshare
 
|{{#urlget:amazon|default}}=display
 
|website_cn=[http://www.waveshare.net/shop/2.7inch-e-Paper-HAT-B.htm 官方中文站点]
 
|website_en=[http://www.waveshare.com/2.7inch-e-paper-hat-b.htm Waveshare website]
 
|interface1=SPI
 
|related=
 
{{Product List|OLEDs / LCDs/e-Paper}}
 
}}
 
<div class="tabber">
 
<div class="tabbertab" title="Introduction">
 
==About the versions==
 
<font backgound=white; color=#DD1223>
 
The 2.7inch e-Paper (B) raw panel was updated to the V2 version. The controller and the driver codes are different and the codes of the two versions are not compatible with each other. Except for the software, the outline of the two versions is the same. If you are the regulars of this display, please note that you need to update your driver codes with the new version refer to our new examples for the V2 version. if your the first time buy and use this display, just need to download and use the new V2 examples. The V2 version has a "V2" sticker on the backside of the display panel. Please confirm the version by the sticker.
 
</font>
 
 
 
== Introduction ==
 
{{E-Paper Raw Panel}}
 
 
 
264x176, 2.7inch EPD (Electronic Paper Display) HAT for Raspberry Pi, three-color
 
  
{{Amazon|{{#urlget:amazon|default}}=display
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<div style="background-color: #343434;text-align: center;color: white;padding: 20px;margin: 8px;">
|More = [http://www.waveshare.com/product/2.7inch-e-paper-hat-b.htm More]}}
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=2.7inch e-Paper HAT (B) Manual=
; Interfaces
 
----
 
{|class="wikitable"
 
|-
 
| VCC || 3.3V
 
|-
 
| GND || GND
 
|-
 
| DIN || SPI MOSI
 
|-
 
| CLK || SPI SCK
 
|-
 
| CS || SPI chip select (Low active)
 
|-
 
| DC || Data/Command control pin (High for data, and low for command)
 
|-
 
| RST || External reset pin (Low for reset)
 
|-
 
| BUSY || Busy state output pin (Low for busy)
 
|}
 
 
 
= Working principle =
 
; Introduction
 
----
 
This product is an E-paper device adopting the image display technology of Microencapsulated Electrophoretic Display, MED. The initial approach is to create tiny spheres, in which the charged color pigments are suspending in the transparent oil and would move depending on the electronic charge. The E-paper screen display patterns by reflecting the ambient light, so it has no background light requirement. ('''Note that the e-Paper cannot support updating directly under sunlight''')
 
; Communication protocol
 
----
 
[[File:1.54inch-e-paper-manual-1.png|400px|thumb|SPI timing]]
 
Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.
 
* CS is slave chip select, when CS is low, the chip is enabled.
 
* DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
 
* SCLK is the SPI communication clock.
 
* SDIN is the data line from the master to the slave in SPI communication.
 
SPI communication has data transfer timing, which is combined by CPHA and CPOL.
 
# CPOL determines the level of the serial synchronous clock at idle state. When CPOL = 0, the level is Low. However, CPOL has little effect to the transmission.
 
# CPHA determines whether data is collected at the first clock edge or at the second clock edge of serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.
 
* There are 4 SPI communication modes. SPI0 is commonly used, in which CPHL = 0, CPOL = 0.
 
As you can see from the figure above, data transmission starts at the first falling edge of SCLK, and 8 bits of data are transferred in one clock cycle. In here, SPI0 is in used, and data is transferred by bits, MSB first.
 
</div>
 
<div class="tabbertab" title="Hardware/Software setup">
 
{{Hardware/Software setting for SPI e-paper}}
 
</div>
 
<div class="tabbertab" title="Codes description">
 
{{e-Paper Codes Description}}
 
 
</div>
 
</div>
 +
<p></p>
 +
{{ContentGrid|grid-gap=25px
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|content =
 +
{{StudyCard
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|img=[[File:E-Paper_Introduction_4.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Overview]]
 +
|heading = Introduction
 +
|content = Parameters, principles, and precautions
 +
}}
 +
{{StudyCard
 +
|img=[[File:Rapberry Pi.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Working_With_Raspberry_Pi]]
 +
|heading = Working with Raspberry Pi
 +
|content = User guides for the development demo of C language, Python
 +
}}
 +
{{StudyCard
 +
|img=[[File:Arduino00.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Working_With_Arduino]]
 +
|heading = Working with the Arduino
 +
|content = User guides for the development demo based on Arduino UNO R3
 +
}}
 +
{{StudyCard
 +
|img=[[File:Jetson Arduino00.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Working_With_Jetson_Nano]]
 +
|heading = Working with the Jetson Nano
 +
|content = User guides for the development demo of C language, Python
 +
}}
 +
{{StudyCard
 +
|img=[[File:Sunrise X3 Pi.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Working_With_Sunrise_X3_Pi]]
 +
|heading = Working with Sunrise X3 Pi
 +
|content = User guides for the development demo based on Python
 +
}}
 +
{{StudyCard
 +
|img=[[File:STM321.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Working_With_STM32]]
 +
|heading = Working with the STM32
 +
|content = User guides for the development demo based on STM32CubeMX
 +
}}
  
<div class="tabbertab" title="Resources">
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{{StudyCard|img=[[File:E-Paper_ESP32.jpg|110px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#ESP32.2F8266]]
== Resources ==
+
|heading = Working with ESP32/8266
 +
|content = User guides for ESP32/8266}}
  
= Documentation =
+
{{StudyCard
*[https://www.waveshare.com/w/upload/3/32/2.7inch-e-paper-hat-b-user-manual-en.pdf User Manual]
+
|img=[[File:Resource0.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Resources]]
{{Commom Instruction of SPI e-paper}}
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|heading = Resources
* [[:File:2.7inch_e-Paper_HAT_Schematic.pdf|Schematic]]
+
|content = Documentation, procedures and data sheets, etc
 
+
}}
= Demo code =
+
{{StudyCard
*[https://github.com/waveshare/e-Paper Github]
+
|img=[[File:FAQ01.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#FAQ]]
 
+
|heading = FAQ
= Datasheets =
+
|content = e-Paper frequently asked questions
* [[:File:2.7inch-e-paper-b-specification.pdf|Datasheets]]
+
}}
*[https://www.waveshare.com/w/upload/7/7b/2.7inch-e-paper-b-v2-specification.pdf 2.7inch e-Paper (B) V2 Specification]
+
{{StudyCard
 
+
|img=[[File:support00.jpg|121px|link=https://www.waveshare.com/wiki/2.7inch_e-Paper_HAT_(B)_Manual#Support]]
=Related Resources=
+
|heading = Support
This is a post in Arduino Form about our SPI e-Paper thanks to ZinggJM, maybe you want to refer to.
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|content = Technical support
*[https://forum.arduino.cc/index.php?topic=487007.0 Waveshare e-Paper display with SPI]
+
}}
 
+
}}
= Related applications =
 
*[https://www.youtube.com/watch?v=bV8onFqIf9M&list=PLy8P3PyBI34PEGAAdADMfu7L9qFtMD1za Raspberry Pi E-paper Display demo]
 
</div>
 
 
 
<div class="tabbertab" title="FAQ">
 
= FAQ =
 
<!--{{e-Paper FAQ}}-->
 
{{e-Paper FAQ}}
 
</div>
 
</div>
 
==Support==
 
{{Service00}}
 
 
 
<!--
 
=== Display a Frame (DisplayFrame) ===
 
DisplayFrame is used to send a frame to module, and the screen will refresh and display it.
 
 
 
Process: Send command data start transmission 1 -> Send data of dark area -> Send command data start transmission 2 -> Send data of red area -> Refresh the screen.
 
 
 
Note:
 
* One frame consist of images of black area and red area, so we need to send two images for displaying one frame,
 
* 1 byte = 8 pixels, doesn’t support Gray scale (Can only display black and white). A bit set stands for black/red pixel, otherwise a bit reset stands for white.
 
 
 
For example:
 
<pre>
 
0xC3:8 pixels ■■□□□□■■
 
0x00:8 pixels □□□□□□□□
 
0xFF:8 pixels ■■■■■■■■
 
0x66:8 pixels □■■□□■■□
 
</pre>
 
* This module doesn’t support partial refresh.
 
* The refresh rate of this module is slow, and it will flicker for several times during refreshing (about 15s). Please be patient.
 
-->
 

Latest revision as of 09:30, 4 March 2024


2.7inch e-Paper HAT (B) Manual

E-Paper Introduction 4.jpg

Introduction

Parameters, principles, and precautions
Rapberry Pi.jpg

Working with Raspberry Pi

User guides for the development demo of C language, Python
Arduino00.jpg

Working with the Arduino

User guides for the development demo based on Arduino UNO R3
Jetson Arduino00.jpg

Working with the Jetson Nano

User guides for the development demo of C language, Python
Sunrise X3 Pi.jpg

Working with Sunrise X3 Pi

User guides for the development demo based on Python
STM321.jpg

Working with the STM32

User guides for the development demo based on STM32CubeMX
E-Paper ESP32.jpg

Working with ESP32/8266

User guides for ESP32/8266
Resource0.jpg

Resources

Documentation, procedures and data sheets, etc
FAQ01.jpg

FAQ

e-Paper frequently asked questions
Support00.jpg

Support

Technical support