alansparrow

http://nmecdesign.com/blog/audio-on-the-raspberry-pi-with-node-js/




Audio on the Raspberry Pi with Node.js
1st June 2013
I recently wanted to play some audio through the Raspberry Pi programatically, but primarily being a web developer I wasn’t really sure how to approach the task. I can manipulate the DOM all day without breaking a sweat, but without the Web Audio API or <audio> element I was a bit stumped. Previously I’ve played around with Node.js on the Pi, but I didn’t think it would have any packages for audio and thought I’d have to use Python or Scratch which are well supported on the Pi.

Turns out you can use Node and it’s pretty simple too. I based my implementation on this Gist:

alansparrow

-startup
../../../plugins/org.eclipse.equinox.launcher_1.3.0.v20140415-2008.jar
--launcher.library
../../../plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_1.1.200.v20140603-1326
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
-showsplash
org.eclipse.platform

alansparrow

Your error is different. You need to 

sudo apt-get install libasound2-dev 

most likely to get that missing alsa.h header file.

alansparrow

/*-----( Import needed libraries )-----*/
#include <Wire.h>  // Comes with Arduino IDE
#include <LiquidCrystal_I2C.h>

/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 20 chars 4 line display
// Set the pins on the I2C chip used for LCD connections:
//                    addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
#include "DHT.h"

alansparrow

"/*" {
    for (;;) {
        while ((c = input()) != '*' && c != EOF)
            ; /* eat up text of comment */
        if (c == '*') {
            while ((c = input()) == '*')
                ;
            if (c == '/')
                break; /* found the end */
        }

alansparrow

/*-----( Import needed libraries )-----*/
#include <Wire.h>  // Comes with Arduino IDE
#include <LiquidCrystal_I2C.h>

/*-----( Declare Constants )-----*/
/*-----( Declare objects )-----*/
// set the LCD address to 0x27 for a 20 chars 4 line display
// Set the pins on the I2C chip used for LCD connections:
//                    addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
#include "DHT.h"

alansparrow

Firstly, go to Sketch->Import Library->Add library
http://arduino-info.wikispaces.com/LCD-Blue-I2C


/* YourDuino.com Example Software Sketch
 16 character 2 line I2C Display
 Backpack Interface labelled "YwRobot Arduino LCM1602 IIC V1"
 terry@yourduino.com */

/*-----( Import needed libraries )-----*/

alansparrow

http://www.element14.com/community/servlet/JiveServlet/previewBody/68203-102-6-294412/GPIO.png

alansparrow

omxplayer -o local file.mp3

alansparrow

sudo apt-get install htop


http://askubuntu.com/questions/114997/how-where-do-i-check-my-ubuntu-laptopss-cpu-usage