WAVESHARE e-paper display

#This article is how to install python librarily in RASBIAN JESSIE Light version.

# e INK display can be purchased from https://www.waveshare.com/ 

# 7.5" HD, which was reasonable price level , is DISCONTINUED as of October 2021

 

https://www.waveshare.com/wiki

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

https://www.waveshare.com/wiki/4.2inch_e-Paper_Module_(B)

https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT

https://www.waveshare.com/wiki/7.5inch_HD_e-Paper_HAT

https://www.waveshare.com/wiki/2.13inch_e-Paper_HAT_(B)#Documentation

 

sudo apt-get update

 

#python2

sudo apt-get update

sudo apt-get install python-pip

sudo apt-get install python-pil

sudo apt-get install python-numpy

sudo pip install RPi.GPIO

sudo pip install spidev

#python3

sudo apt-get update

sudo apt-get install python3-pip

sudo apt-get install python3-pil

sudo apt-get install python3-numpy

sudo pip3 install RPi.GPIO

sudo pip3 install spidev

 

 

#enable I2C and SPI in option

sudo raspi-config

I2C and SPI >> Enabled  #In Interfacing options

 

sudo apt-get install python-dev

 

#download and install https://pypi.python.org/pypi/RPi.GPIO

sudo pip install RPi.GPIO

또는 python3에서 ↓

sudo pip3 install RPi.GPIO

#pip 가 없다면 sudo apt-get install python3-pip 로 설치, python3버전

#pip 가 없다면 sudo apt-get install python-pip 로 설치, python2버전

#위 명령어로 해결

wget https://files.pythonhosted.org/packages/e2/58/6e1b775606da6439fa3fd1550e7f714ac62aa75e162eed29dbec684ecb3e/RPi.GPIO-0.6.3.tar.gz

tar -xzf RPi.GPIO-0.6.3.tar.gz

cd RPi.GPIO-0.6.3

sudo python setup.py install

 

sudo apt-get install python-smbus

 

sudo apt-get install python-serial

 

# download and install  SPIDEV from https://pypi.python.org/pypi/spidev

sudo pip install spidev

또는 python3에서 ↓

sudo pip3 install spidev

 

wget https://files.pythonhosted.org/packages/36/83/73748b6e1819b57d8e1df8090200195cdae33aaa22a49a91ded16785eedd/spidev-3.2.tar.gz

tar -xzf spidev-3.2.tar.gz

cd spidev-3.2

sudo python setup.py install

 

sudo apt-get install python-imaging

 

# add following blue texts in modules

sudo nano /etc/modules

i2c-bcm2708

i2c-dev

 

#DEMO CODE in case of 2.9INCH

wget https://www.waveshare.com/w/upload/7/78/2.9inch_e-Paper_Module_code.7z

#DEMO CODE in case of 2.13INCH

wget https://www.waveshare.com/w/upload/1/1c/2.13inch_e-Paper_HAT-code.7z

#DEMO CODE in case of 7.5inch from https://www.waveshare.com/wiki/File:7.5inch-e-paper-hat-code.7z

wget https://www.waveshare.com/w/upload/0/06/7.5inch-e-paper-hat-code.7z

 

sudo apt-get install p7zip-full

 

7za x filename.7z

 

 

# In case of Rasbian LITE version, font is not installed, so it should be installed by following command

sudo apt-get install python-pygame

# font location - normally, font location in waveshare demo codes has wrong directory information.

/usr/share/fonts/truetype/freefont/FreeMono.ttf

 

 

 

DIRECTIONS / 주의사항

Refresh mode 갱신방식

• Full refresh: e-Paper flicker when full refreshing to remove ghost image for best display.
• Partial refresh: It don't flicker if you use partial refresh (only some of the two-color e-paper support partial refresh). 
• Note that you cannot use Partial refresh all the time, you should full refresh e-paper regularly, otherwise, ghost problem will get worse even damage.
• 부분적인 갱신을 항상 사용하실 수 없습니다, 전체 갱신을 규칙적으로 사용하셔야 합니다, 그렇지 않으면 잔상현상이 나빠지고 제품 손상을 입을 수 있습니다.

Refresh rate 갱신비율

• When using, you should set the update interval at least 180s.(except Partial supportable types)
• 사용하실때, 화면 업데이트를 3분 간격으로 해주십시오(부분갱신 제외)
• Please set the e-Paper to sleep mode or power off it directly, otherwise, the e-Paper is damaged because of working in high voltage for long time.
• e-paper를 절전모드나 전원을 직접끄게 설정해 주십시오, 그렇지 않으면 오랜시간 높은 전원으로 인해 손상을 입습니다.
• You need to update the content of three-color e-Paper at least one time every 24h to avoid from burn-in problem.

Working place 동작장소

• We recommend you to use the e-Paper indoor. If you need to set the e-paper outdoor, Please place the e-paper in shadow and protect it from UV. When you designed you e-paper product, you should take care about the working situation like temperature, humidity, etc.

Please set the e-paper to sleep mode or disconnect it if you needn't refresh the e-paper but need to power on your development board or Raspberry Pi for long time.Otherwise, the voltage of panel keeps high and it will damage the panel

오랫동안 라즈베리파이의 화면을 갱신하지 않고 전원을 오랫동안 켜놓아야 할 경우 전원을 빼거나 절전모드로 설정하십시오, 그렇지 않으면 높은 전원으로 인해 화면에 손상을 가합니다.

 

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# ROTATE

#180 degree rotate #Insert transpose(Image.ROTATE_180)

# ref1 https://www.raspberrypi.org/forums/viewtopic.php?t=228836

# ref2 https://pillow.readthedocs.io/en/5.1.x/handbook/tutorial.html?highlight=Rotate

 

    HBlackimage = Image.new('1', (epd4in2b.EPD_WIDTH, epd4in2b.EPD_HEIGHT), 255)  # 298*126

 ~~~~    

    HBlackimage = HBlackimage.transpose(Image.ROTATE_180)

    epd.display(epd.getbuffer(HBlackimage), epd.getbuffer(HRedimage))