easybotics-rpi-rgb-led-matrix

WORKS ON THE RASPBERRY PI 3B AND RASPBERRY PI 4!!!!

tested on node 8 and node 10, probably works on node13 now

check out this guys fork: https://github.com/easybotics/node-rpi-rgb-led-matrix/pull/9

targetted at raspbian jesse

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

Fork of: https://github.com/zeitungen/node-rpi-rgb-led-matrix

Actively being maintained and modified for: https://github.com/easybotics/node-red-contrib-led-matrix

It is binding recent version of rpi-rgb-led-matrix library.

Installation with npm

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

Installation with git

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

Get some Fun

var LedMatrix = require("easybotics-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);
matrix.update();

The API has changed somewhat since the zeitungen version

LedMatrix API

All operations modify a local frame buffer, only after calling 'Update' are they printed to the display

Constructor: LedMatrix (rows, cols, parallelDisplays, chainedDisplays, brightness, hardware-mapping, rgbSequence, cliFlags)

rows: height of led panels in pixels
cols: width of led panels in pixels
parallelDisplays: number of parallel panels
chainedDisplays: number of chained panels
brightness: initial brightness 0 - 100
hardware-mapping: 'regular', 'adafruit-hat' etc
rgbSequence: default 'RGB'
cliFlags: array of cli flags

brightness (value)
```
set brightness between 0 - 100
```
clear ()
```
clear the display buffer
```
drawCircle (x, y, radius, r, g, b)
```
draw colored circle to the buffer
```
drawLine (x0, y0, x1, y1, r, g, b)
```
draw colored line to the buffer
```

drawText (x, y, text, font, r, g, b)

draw colored text to the buffer
to use the fonts that come with the repo it looks something like this

const input = "hello world!"; //whever you get the input from
const font  =  __dirname + '/fonts/' + "5x8.bdf";
led.drawText(x, y, input, font, r, g, b);
led.update();

fill (r, g, b)
```
fill the buffer with a color
```
getHeight ()
```
get height of addressable space
```

getWidth ()

get width of addressable space

scroll
setImageBuffer
mysterious methods back from before we picked up this library

setPixel (x, y, r, g, b)
```
set pixel to a color
```

update ()

Draw the current buffer to the display (with vsync!)

easybotics / node-rpi-rgb-led-matrix

readme