Waveshare42B

corrected driver & demo for the Waveshare 4.2inch e-Paper Module Model : https://www.waveshare.com/wiki/4.2inch_e-Paper_Module_(B)

Raspberry installation

Be sure to activate SPI & I2C interface in raspi-config

to use this screen on a rasberry, you need to install these modules : python-dev, pillow, spidev

Be sure you have installed libjpeg-dev before pillow installation : sudo apt-get install libjpeg-dev

sudo apt-get install python-dev pillow
sudo apt-get install python-smbus python-serial
sudo pip install spidev

Screen Connection

e-Paper	Raspberry Pi 3B
3.3V	3.3V - Pin 17
GND	GND - Pin 20
DIN	MOSI - Pin 19
CLK	SCLK - Pin 23
CS	CE0 - Pin 24
DC	GPIO 25 - Pin 22
RST	GPIO 17 - Pin 11
BUSY	GPIO 24 - Pin 18

changed from the Waveshare version

avoid floats using integer when needed in epd4in2b.py correct importing Pillow

Links

https://www.waveshare.com/wiki/4.2inch_e-Paper_Module_(B) https://www.waveshare.com/wiki/Pioneer600#Libraries_Installation_for_RPi