node-rpi-rgb-led-matrix

Pilot your rgb led matrix with Nodejs on Raspberry Pi ! Nodejs binding of rpi-rgb-led-matrix library https://github.com/hzeller/rpi-rgb-led-matrix

PROJECT NOT MAINTAINED ! :(

If you want to see a better and up to date project go to https://github.com/easybotics/node-rpi-rgb-led-matrix

This repository probably will not work with recent nodejs version.

This repository is probably not binding recent version of rpi-rgb-led-matrix library.

Compatibility

NOTE: node-rpi-rgb-led-matrix should work across Node.js versions 0.8, 0.10, 0.12, 4 and 5 as it uses Native Abstractions. HOWEVER there is a problem with the Node.js version 0.10.29 packaged with Raspbian Jessie 2015-11-21 which breaks Native Abstractions. The easiest fix is to make a minor edit to your v8.js file; this and other solutions outlined on this Raspberry Pi Forum post.

Installation with npm

$ npm i node-rpi-rgb-led-matrix

Installation with git

$ git clone --recursive https://github.com/zeitungen/node-rpi-rgb-led-matrix.git
$ cd node-rpi-rgb-led-matrix
$ npm i

Get some Fun

var LedMatrix = require("node-rpi-rgb-led-matrix");

//init a 16 rows  by 16 cols led matrix 
//default hardware mapping is 'regular', could be 'adafruit-hat-pwm' ect 
var matrix = new LedMatrix(16, 16 );
matrix.fill(255, 50, 100);
matrix.setPixel(0, 0, 0, 50, 255);

LedMatrix API

Constructor: LedMatrix(rows, cols, chainedDisplays, parallelDisplays, hardware-mapping) default values are rows=32, cols=32, chainedDisplays=1, parallelDisplay=1, hardware-mapping=regular
getWidth() return current led matrix width
getHeight() return current led matrix height
fill(red, green, blue) fill the led matrix with color specified by red, green and blue. red, green and blue must be between 0 and 255
setPixel(x, y, red, green, blue) set the color pixel at the position x,y with color specified by red, green and blue. red, green and blue must be between 0 and 255. x must be between 0 and getWidth(). y must be between 0and getGeight()
clear() reset the led matrix display (shut down all leds)

Add specific defines for rpi-rgb-led-matrix

You can add specific defines for the rpi-rgb-led-matrix compilation.

You have to modify the binding.gyp file. In the rpi-rgb-led-matrix target add definesarray like this:

...
  {
            "target_name": "rpi-rgb-led-matrix",
            "type": "static_library",
            "sources": ["external/matrix/lib/bdf-font.cc",
                "external/matrix/lib/framebuffer.cc", "external/matrix/lib/gpio.cc",
                "external/matrix/lib/graphics.cc", "external/matrix/lib/led-matrix.cc",
                "external/matrix/lib/thread.cc"],
            "libraries": ["-lrt", "-lm", "-lpthread"],

            "defines": ["RGB_CLASSIC_PINOUT", "ONLY_SINGLE_CHAIN"],

            "include_dirs": [ "external/matrix/include" ],
            "direct_dependent_settings": {
                "include_dirs": [ "external/matrix/include" ]
            }
        }
...

You have this defines possibility:

INVERSE_RGB_DISPLAY_COLORS
SHOW_REFRESH_RATE
RGB_SLOWDOWN_GPIO=1 or RGB_SLOWDOWN_GPIO=2
ADAFRUIT_RGBMATRIX_HAT
ADAFRUIT_RGBMATRIX_HAT_PWM
RGB_CLASSIC_PINOUT
ONLY_SINGLE_CHAIN

Look at rpi-rgb-led-matrix Makefile for more details of this defines.

Don't forget to recompile:

$ cd /path/to/node-rpi-rgb-led-matrix
$ node-gyp build

or run npm i.

zeitungen / node-rpi-rgb-led-matrix