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Dimensions | 4.37 inch |
Dimensions (driver board) | 101.5mm x 81.5mm |
Dimensions (Display) | 90.11mm x 64.77mm |
Outline Dimension (raw panel) | 99.5mm × 79.5mm × 0.85mm |
Operating Voltage | 3.3V / 5V (Both power supply and signal require 5V) |
Communication Port | SPI |
Dot pitch | 0.176 × 0.176mm |
Resolution | 512 x 368 |
Display Color | Black, White, Yellow, Red |
Grayscale | 2 |
Refresh Time | 15s |
Refresh Power Consumption | < 61.7 mW (typ.) |
Standby current | < 0.01uA (close to 0) |
【Remarks】For more information about SPI, you can search for information online.
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 suspended 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. 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.
For the four-color e-ink screen, we can understand with reference to the black and white four grayscale pictures, there are still some differences.
In order to save memory space, the e-ink screen compresses the pixels:
Black: 00b
White: 01b
Yellow: 10b
Red: 11b
Let's take 4 pixels as an example:
pixel | 1 | 2 | 3 | 4 | ||||
bit | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Data | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 |
Color | Black | White | Yellow | Red | ||||
byte | 0x1B |
Write data 0 x 1B into register 0 x 10, then set the four pixels in the e-ink screen to black, white, yellow, and red.
Picture production and conversion of multi-color E-ink.
Required software: Adobe PhotoShop CC, Painting
Preparation: Download color sheet to PC, and unzip to get the file as shown below, we are going to use "N-color.act." or "4-color.act".
1. New Photoshop project set the width and height according to the actual resolution of the e-Paper display, the color mode uses RGB. The resolution of this module is 800*480. Change the width to 800 pixels and the height to 480 pixels.
2. Prepare the corresponding picture, copy it into the project, and adjust the parameters such as size and contrast (similar to the steps for processing pictures in general Photoshop).
3. Select File->Save for Web and Devices.
4. Select the color table as shown below. Load the color table provided in Preparation.
5. For seven-color pictures, load N-color. act, then click Save and save as a gif file. Then convert it into BMP format and use it on this module.
For four-color images, load 4-color. act, then click Save and save as a gif file. Then convert it into BMP format and use it on this module.
6. Open the gif file with Paint and save it as a 24-bit BMP image.
7. By now, the color picture available for this module has been made, and it can be put into the SD card of the Raspberry Pi or e-Paper Shield module for use.
Note: Theis application is provided for your convenience and is open source, our company does not provide technical support for it.
When connecting the Raspberry Pi, you can directly insert the board into the 40PIN pin header of the Raspberry Pi, and pay attention to the correct pins.
If you choose to connect with an 8PIN cable, please refer to the pin correspondence table below:
e-Paper | Raspberry Pi | |
BCM2835 | Board | |
VCC | 3.3V | 3.3V |
GND | GND | GND |
DIN | MOSI | 19 |
CLK | SCLK | 23 |
CS | CE0 | 24 |
DC | 25 | 22 |
RST | 17 | 11 |
BUSY | 24 | 18 |
sudo raspi-config Choose Interfacing Options -> SPI -> Yes Enable SPI interface
Then reboot your Raspberry Pi:
sudo reboot
#Open the Raspberry Pi terminal and run the following command wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz tar zxvf bcm2835-1.71.tar.gz cd bcm2835-1.71/ sudo ./configure && sudo make && sudo make check && sudo make install # For more information, please refer to the official website: http://www.airspayce.com/mikem/bcm2835/
#Open the Raspberry Pi terminal and run the following command: sudo apt-get install wiringpi #For Raspberry Pi systems after May 2019 (earlier than before, you may not need to execute), you may need to upgrade: wget https://project-downloads.drogon.net/wiringpi-latest.deb sudo dpkg -i wiringpi-latest.deb gpio -v #Run gpio -v and version 2.52 will appear. If it does not appear, the installation is wrong. #Bullseye branch system use the following command: git clone https://github.com/WiringPi/WiringPi cd WiringPi ./build gpio -v # Run gpio -v and version 2.60 will appear. If it does not appear, it means that there is an installation error.
git clone https://github.com/waveshare/e-Paper.git cd e-Paper/RaspberryPi_JetsonNano/
sudo apt-get install p7zip-full wget https://www.waveshare.com/w/upload/3/39/E-Paper_code.7z 7z x E-Paper_code.7z -O./e-Paper cd e-Paper/RaspberryPi_JetsonNano/
# Now at e-Paper/RaspberryPi_JetsonNano cd c sudo make clean sudo make -j4 EPD=epd4in37g
sudo ./epd
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
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
git clone https://github.com/waveshare/e-Paper.git cd e-Paper/RaspberryPi_JetsonNano/
sudo apt-get install p7zip-full wget https://www.waveshare.com/w/upload/3/39/E-Paper_code.7z 7z x E-Paper_code.7z -O./e-Paper cd e-Paper/RaspberryPi_JetsonNano/
# Make sure it's in e-Paper/RaspberryPi_JetsonNano/ cd python/examples/ python3 epd_4in37g_test.py
Use an 8PIN cable to connect, please refer to the pin correspondence table below:
e-Paper | Arduino UNO | Mega2560 |
VCC | 5V | 5V |
GND | GND | GND |
DIN | D11 | D51 |
CLK | D13 | D52 |
CS | D10 | D10 |
DC | D9 | D9 |
RST | D8 | D8 |
BUSY | D7 | D7 |
Arduino IDE Windows Install Guide
The 40PIN pin of Jetson Nano is compatible with the 40PIN pin of Raspberry Pi and provides a Jetson.GPIO library with the same API as the RPI.GPIO library of Raspberry Pi, so the serial number connected here is the same as that of Raspberry Pi. The module can be directly inserted into the 40Pin headers of the Jetson Nano when using the 40PIN interface.
If you choose to connect with an 8PIN cable, please refer to the pin correspondence table below:
e-Paper | Jetson Nano Developer Kit | |
BCM2835 | Board | |
VCC | 3.3V | 3.3V |
GND | GND | GND |
DIN | 10 (SPI0_MOSI) | 19 |
CLK | 11 (SPI0_SCK) | 23 |
CS | 8 (SPI0_CS0) | 24 |
DC | 25 | 22 |
RST | 17 | 11 |
BUSY | 24 | 18 |
git clone https://github.com/waveshare/e-Paper.git cd e-Paper/RaspberryPi_JetsonNano/
sudo apt-get install p7zip-full wget https://www.waveshare.com/w/upload/3/39/E-Paper_code.7z 7z x E-Paper_code.7z -O./e-Paper cd e-Paper/RaspberryPi_JetsonNano/
# Now at e-Paper/RaspberryPi_JetsonNano cd c sudo make clean sudo make JETSON -j4 EPD=epd4in37g
sudo ./epd
sudo apt-get update sudo apt-get install python3-numpy sudo apt-get install python3-pip sudo pip3 install Jetson.GPIO
git clone https://github.com/waveshare/e-Paper.git cd e-Paper/RaspberryPi_JetsonNano/
sudo apt-get install p7zip-full wget https://www.waveshare.com/w/upload/3/39/E-Paper_code.7z 7z x E-Paper_code.7z -O./e-Paper cd e-Paper/RaspberryPi_JetsonNano/
# Make sure it's in e-Paper/RaspberryPi_JetsonNano/ cd python/examples/ python3 EPD=epd4in37g
When connecting the Sunrise X3 Pi, you can directly insert the board into the 40PIN pin header of the Sunrise X3 Pi, and pay attention to the correct pins.
If you choose to connect with an 8PIN cable, please refer to the pin correspondence table below:
e-Paper | Sunrise X3 Pi | |
BCM | Board | |
VCC | 3.3V | 3.3V |
GND | GND | GND |
DIN | MOSI | 19 |
CLK | SCLK | 23 |
CS | CE0 | 24 |
DC | 25 | 22 |
RST | 17 | 11 |
BUSY | 24 | 18 |
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 Hobot.GPIO sudo pip install spidev
git clone https://github.com/waveshare/e-Paper.git cd e-Paper/RaspberryPi_JetsonNano/
sudo apt-get install p7zip-full wget https://www.waveshare.com/w/upload/3/39/E-Paper_code.7z 7z x E-Paper_code.7z -O./e-Paper cd e-Paper/RaspberryPi_JetsonNano/
# Make sure you are in e-Paper/RaspberryPi_JetsonNano/ cd python/examples/ python3 epd_4in37g_test.py
e-Paper | STM32 |
VCC | 3.3V |
GND | GND |
DIN | PA7 |
CLK | PA5 |
CS | PA4 |
DC | PA2 |
RST | PA1 |
BUSY | PA3 |