A Node.js package for the 7.5inch e-Paper HAT(B) waveshare display on a Raspberry Pi 2/3/zero
- WiringPi for GPIO access of Raspberry Pi
- libgd2 for text outp 7A46 ut and drawing
Enable the SPI interface on Raspberry Pi: sudo raspi-config
WiringPi: follow installation on wiringpi.com
libgd2: sudo apt-get install libgd2-dev # libgd
epd7x5: npm install epd7x5
const epd7x5 = require('epd7x5');
//init the module
epd7x5.init();
//get a gd image of 640 x 384 Pixels for drawing
var img = epd7x5.getImageBuffer() ;
//load some fonts
let font = '/home/pi/epd_test/ARIAL.TTF';
//draw content with node-gd functions
img.stringFT(epd7x5.black, font, 64, -0.0, 5, 100, 'Hello EPD 7x5!');
img.stringFT(epd7x5.red, font, 64, -0.0, 5, 200, 'Hello EPD 7x5!');
img.filledRectangle(0, 220, 640, 310, epd7x5.red)
img.stringFT(epd7x5.white, font, 64, -0.0, 5, 300, 'Hello EPD 7x5!');
//send the image for display
epd7x5.displayImageBuffer(img);The module exports the following functions and constants:
epd7x5.init()
epd7x5.getImageBuffer()
epd7x5.displayImageBuffer(img)
epd7x5.white
epd7x5.red
epd7x5.black
epd7x5.width
epd7x5.height
epd7x5.gd
example: epd7x5.gd.createFromFile(path) to open an image
Documentation of node-gd functions can be found here
Apache 2.0