var http = require('http');
var express = require('express');
var app = express();
var leds = require('rpi-ws2801');
var numPixels= 59;
leds.connect(numPixels); // assign number of WS2801 LEDs
process.on( 'SIGINT', function() {
console.log( "\nshutting down from (Ctrl-C)" )
leds.clear();
leds.disconnect();
process.exit( )
})
var intervalIDeffect
function randomAnimation(){
var colorBuffer = new Buffer(leds.getChannelCount());
var animationTick = 0.005;
var angle = 0;
var ledDistance = 0.3;
intervalIDeffect = setInterval(function(){
angle = (angle < Math.PI * 2) ? angle : angle - Math.PI*2;
for (var i=0; i<colorBuffer.length; i+=3){
//red
colorBuffer[i] = 128 + Math.sin(angle + (i/3)*ledDistance) * 128;
//green
colorBuffer[i+1] = 128 + Math.sin(angle * -5 + (i/3)*ledDistance) * 128;
//blue
colorBuffer[i+2] = 128 + Math.sin(angle * 7 + (i/3)*ledDistance) * 128;
}
var leds = require('rpi-ws2801');
// connecting to Raspberry Pi SPI
leds.connect(7); // assign number of WS2801 LEDs
// set all colors to yellow
console.log("fill all yellow");
// fill(r, g, b)
// r, g, b: value as hex (0x00 = 0, 0xFF = 255, 0x7F = 127)
leds.fill(0xFF, 255, 0x00);
// after 2 seconds set first 6 LEDs to (red, green, blue, red, green, blue)
setTimeout(function(){
console.log("red green blue red green blue");
// setRGB(ledIndex, hexColor);
// ledIndex: 0 = LED1, 1 = LED2, …
// hexColor: '#FF0000' = red, '#00FF00' = green, ...
leds.setRGB(0, '#FF0000'); // set LED1 to red
leds.setRGB(1, '#00FF00'); // set LED2 to green
leds.setRGB(2, '#0000FF'); // set LED3 to blue
// setColor(ledIndex, color);
// ledIndex: 0 = LED1, 1 = LED2, …
// color: array[red, green, blue] = [255,0,0] = red, [0,255,0] = green
leds.setColor(3, [255,0,0]); // set LED4 to red
leds.setColor(4, [0,255,0]); // set LED5 to green
leds.setColor(5, [0,0,255]); // set LED6 to blue
// send all set colors to SPI via update();
leds.update();
}, 2000);