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{{Infobox item
|name=2.13inch Touch e-Paper HAT
|img=[[File:2in13_Touch_e-Paper_HAT_info1.jpg|300px|{{Amazon_nolink|default={{#ifeq: {{#urlget:amazon|0}}|{{#urlget:Amazon|0}}| default|}}|url=link=}}]]
|caption=2.13inch Touch EPD HAT For Raspberry Pi, 250×122 Pixels, Black / White, SPI Interface
|category=[[:Category:OLEDs / LCDs|OLEDs / LCDs]], [[:Category:LCD|LCD]]
|{{#ifeq: {{#urlget:amazon|0}}|{{#urlget:Amazon|0}}| default|}}=display
|website_cn=[ 官方中文站点]
|website_en=[ Waveshare website]
{{Product List|OLEDs / LCDs/e-Paper}}
<div class="tabber">
<div class="tabbertab" title="Introduction">
2.13inch Touch e-Paper HAT
*Size: 2.13inch
*Outline dimensions(Module): 69.15 × 38.90mm
*Outline dimensions(Driver Board): 59.51mm × 34.00mm
*Display area: 48.55mm × 23.71mm
*Operating Voltage: 3.3V (V1.1 support 5V)
*Communication interface: SPI
*Dot pitch: 0.194 × 0.194mm
*Resolution: 250×122 pixels
*Display color: black, white
*Greyscale: 2
*Partial refresh time: 0.3s
*Full refresh time: 2s
*Refresh power: 26.4mW(typ.)
*Touchpoints: 5 (MAX)
*Touch type: Capacitive touch
*Touch interfaced: I2C
*Touch panel: Toughened Glass
*Refresh time: The refresh time is experimental test data, there will have some deviation from the actual refresh time, so please refer to the actual refresh time. The e-paper will flicker during the full refresh process, this is a normal phenomenon.
*Power consumption: The power consumption data is experimental test data. The actual power consumption will have a certain deviation due to the existence of the driver board and the actual usage. Please refer to the actual refresh power consumption.
==SPI Communication Timing==
Since the ink screen only needs to be displayed, the data cable (MISO) sent from the machine and received by the host is hidden here.
<div style="background-color: #343434;text-align: center;color: white;padding: 20px;margin: 8px;">
*CS: Slave chip select, when CS is low, the chip is enabled
=2.13inch Touch e-Paper HAT Manual=
*DC: data/command control pin, write command when DC=0; write data when DC=1
*SCLK: SPI communication clock
*SDIN: SPI communication master sends, slave receives
*Timing: CPHL=0, CPOL=0 (SPI0)
[Remarks] For specific information about SPI, you can search for information online.<big>
==Working protocol==
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 displays patterns by reflecting the ambient light, so it has no background light requirement. Under ambient light, the E-paper screen still has high visibility with a wide viewing angle of 180 degrees. It is the ideal choice for E-reading. ('''Note that the e-Paper cannot support updating directly under sunlight''')
===Pixel & Byte===
We define the pixels in a monochrome picture, 0 is black and 1 is white.<br />
White:□,Bit 1<br />
Black:■:Bit 0<br />
*The dot in the figure is called a pixel. As we know, 1 and 0 are used to define the color, therefore we can use one bit to define the color of one pixel, and 1 byte = 8pixels<br />
*For example, If we set the first 8 pixels to black and the last 8 pixels to white, we show it by codes, they will be 16 bit as below:<br />
[[file:e-paper_hardware_work_1.png]]<br />
For computer, the data is saved in MSB format:<br />
[[file:e-paper_hardware_work_2.png]]<br />
So we can use two bytes for 16 pixels.<br />
#For the screen that supports partial update, please note that you cannot refresh the screen with the partial mode all the time. After several partial updating, you need to fully refresh the screen once. Otherwise, the screen display effect will be abnormal, which cannot be repaired!<br/>
#Because of the different batches, some of them have aberrations. Store the e-Paper right side up will reduce it. And if the e-Paper didn't be refreshed for a long time, it will become more and more reddish/yellowish. Please use the demo code to refresh the e-paper several times in this case.<br/>
#Note that the screen cannot be powered on for a long time. When the screen is not refreshed, please set the screen to sleep mode, or power off the e-Paper. Otherwise, the screen will remain in a high voltage state for a long time, which will damage the e-Paper and cannot be repaired!<br/>
#When using the e-Paper, it is recommended that the refresh interval be at least 180s, and refresh at least once every 24 hours. If the e-Paper is not used for a long time, the ink screen should be brushed and stored. (Refer to the datasheet for specific storage environment requirements)<br/>
#After the screen enters sleep mode, the sent image data will be ignored, and it can be refreshed normally only after initializing again.<br/>
#Control the 0x3C or 0x50 (refer to the datasheet for details) register to adjust the border color. In the routine, you can adjust the Border Waveform Control register or VCOM AND DATA INTERVAL SETTING to set the border.<br/>
#If you find that the created image data is displayed incorrectly on the screen, it is recommended to check whether the image size setting is correct, change the width and height settings of the image and try again.<br/>
#The working voltage of the e-Paper is 3.3V. If you buy the raw panel and you need to add a level convert circuit for compatibility with 5V voltage. The new version of the driver board (V2.1 and subsequent versions) has added a level processing circuit, which can support both 3.3V and 5V working environments. The old version can only support a 3.3V working environment. You can confirm the version before using it. (The one with the 20-pin chip on the PCB is generally the new version)<br/>
#The FPC cable of the screen is relatively fragile, pay attention to bending the cable along the horizontal direction of the screen when using it, and do not bend the cable along the vertical direction of the screen<br/>
#The screen of e-Paper is relatively fragile, please try to avoid dropping, bumping, and pressing hard.<br/>
#We recommend that customers use the sample program provided by us to test with the corresponding development board after they get the screen.<br/>
<div class="tabbertab" title="Working with Pi">
{{Hardware/Software setting for touch e-paper HAT}}
<div class="tabbertab" title="Codes description">
{{touch e-Paper Codes Description}}
<div class="tabbertab" title="Resources">
* {{Commom Instruction of SPI e-paper}}
* [[:File:2.13inch_Touch_e-Paper_HAT.pdf|Schematic]]
===Demo code===
<!-- * [[|Demo code]](只更新github)-->
* [ Github]
* [[:File:2.13inch_e-Paper_Specification.pdf|2.13inch e-Paper Specification V2]]
<div class="tabbertab" title="FAQ">
{{e-paper Hat FAQ}}
|content =
|heading = Introduction
|content = Parameters, principles, and precautions
|img=[[File:Rapberry Pi.jpg|121px|link=]]
|heading = Working with Raspberry Pi
|content = User guides for the development demo of C language, Python
|heading = API Analysis
|content = User guides for C and Python demos
|heading = Resources
|content = Documentation, procedures, and datasheets, etc
|heading = FAQ
|content = e-Paper frequently asked questions
|heading = Support
|content = Technical support

Latest revision as of 06:02, 21 November 2022

2.13inch Touch e-Paper HAT Manual

E-Paper Introduction 4.jpg


Parameters, principles, and precautions
Rapberry Pi.jpg

Working with Raspberry Pi

User guides for the development demo of C language, Python

API Analysis

User guides for C and Python demos


Documentation, procedures, and datasheets, etc


e-Paper frequently asked questions


Technical support