Initial checkin.

.gitignore

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+.DS_Store
+node_modules
+*.sublime-workspace
+public/css/style.css

README.md

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+##[Node-LEDS](http://www.quietless.com/kitchen/controlling-24-leds-with-node-js-and-a-raspberry-pi/)
+
+This was a quick project to see how difficult it would be to control an Arduino microcontroller over a local network with a Raspberry PI.
+
+To build the project you'll need to setup Node.js. [ideally on a PI if you want to build the project to spec.](http://www.quietless.com/kitchen/how-to-setup-node-js-on-a-raspberry-pi/)
+
+Materials used in this project:
+
+ * [Raspberry PI Model B](http://www.raspberrypi.org/)
+ * [Arduino Leonardo](https://www.sparkfun.com/products/11286)
+ * [2x 400 tie pt Breadboards](https://www.sparkfun.com/products/9567)
+ * [1x Full Length Breadboard](https://www.sparkfun.com/products/112)
+ * [4x74HC595 Shift Registers](https://www.sparkfun.com/products/733)
+ * [7-Segment Display - 4-Digit](https://www.sparkfun.com/products/9481)
+ * [24 Leds](http://www.amazon.com/microtivity-IL188-Assorted-Resistors-Colors/dp/B0060FGA8A)
+ * [Bunch of Jumper Wires](http://www.amazon.com/Breadboard-jumper-wire-75pcs-pack/dp/B0040DEI9M)
+
+Installation:
+
+ 1. [Follow the schematic to wire everything up](http://quietless.com/docs/node-leds/node-leds.pdf)
+ 2. Flash the sketch at /arduino/node-led/node-led.ino onto your Arduino
+ 3. Connect the Arduino to your PI
+ 4. Fire up the Node server by running the app via > node app
+ 5. Point a web browser at the IP address of the PI e.g. 192.168.2.1:8080
+
+Any questions, comments, suggestions open an issue or [post a comment on my blog.](http://www.quietless.com/kitchen/controlling-24-leds-with-node-js-and-a-raspberry-pi/)
+
+
+![Node-LEDS-schematic](http://quietless.com/docs/node-leds/node-leds.png "Node-LEDS-schematic")

app.js

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+
+/**
+ * Node-Serial
+ * Author: flabbergast
+ * based on node-leds by Stephen Braitsch (https://github.com/braitsch/node-leds)
+ */
+
+var express = require('express')
+  , http = require('http')
+  , port = require('./modules/serial_node')
+  , socket = require('./modules/socket_server');
+
+var app = express();
+
+app.configure(function(){
+	app.set('port', 8080);
+	app.set('views', __dirname + '/views');
+	app.set('view engine', 'jade');
+	app.locals.pretty = true;
+	app.use(express.bodyParser());
+	app.use(express.cookieParser());
+	app.use(express.session({ secret: 'super-duper-secret-secret' }));
+	app.use(express.methodOverride());
+	app.use(require("stylus").middleware({
+		compress: true,
+		src: __dirname + "/public"
+	}));
+	app.use(express.static(__dirname + '/public'));
+});
+
+app.configure('development', function(){
+	app.use(express.errorHandler());
+});
+
+/* ROUTES */
+
+app.get('/', function(req, res){
+	res.render('index');
+});
+
+/* start the node server & initialize socket-io */
+var server = http.createServer(app).listen(app.get('port'), function(){
+	socket.init(require('socket.io').listen(server));
+	console.log("Express server listening at", server.address());
+});

llap.sublime-project

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+{
+	"folders":
+	[
+		{
+			"path": "/Users/js/Documents/Programming/Node/llap"
+		}
+	]
+}

modules/serial_node.js

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+/*
+	Public API
+*/
+
+exports.writeNumber = function(n)
+{
+// parse number into multiplier and remainder //
+	var m = Math.floor(n/255);
+	var r = n%255;
+	var data = [1, m, r];
+	console.log('sending over serial ::', data);
+	sendDataOverSerial(new Buffer(data));
+}
+
+exports.getPath = function()
+{
+	if(serport) {
+		return serport.path;
+	} else {
+		return "not connected";
+	}
+}
+
+/*
+	Private Methods
+*/
+
+var serport;
+var socket = require('./socket_server');
+var serialport = require('serialport');
+var exec = require('child_process').exec;
+
+/*
+	Attempt to connect to a serial port
+*/
+
+var detectSerialOnOSX = function()
+{
+	var port;
+	console.log('* attempting to detect a serial port on mac osx *');
+	exec('ls /dev/tty.*', function(error, stdout, stderr){
+		if (stdout){
+			var ports = stdout.split('\n');
+			for (var i = ports.length - 1; i >= 0; i--){
+				if (ports[i].search('usbmodem') != -1 || ports[i].search('usbserial') != -1) port = ports[i];
+			}
+		}
+		if (port){
+			attemptConnection(port);
+		}	else{
+			detectSerialOnRaspberryPI();
+		}
+	});
+}
+
+var detectSerialOnRaspberryPI = function()
+{
+	var port;
+	console.log('* attempting to connect to a serial port on raspberry pi *');
+	serialport.list(function (e, ports) {
+		ports.forEach(function(obj) {
+			if (obj.hasOwnProperty('pnpId')){
+		// FTDI captures the duemilanove //
+		// Arduino captures the leonardo //
+				if (obj.pnpId.search('FTDI') != -1 || obj.pnpId.search('Arduino') != -1) {
+					port = obj.comName;
+				}
+			}
+		});
+		if (port){
+			attemptConnection(port);
+		}	else{
+			console.log('* failed to find a serial port : please check your connections *');
+		}
+	});
+}
+
+var attemptConnection = function(port)
+{
+	console.log('* attempting to connect to serial at :', port, ' *');
+	serport = new serialport.SerialPort(port, { baudrate: 9600, parser: serialport.parsers.readline("\n") });
+	serport.on("open", function () {
+		console.log('* connection to a serial port successful ! *');
+		serport.on('data', function(data){
+	// send incoming data from serport out to the socket server //
+			socket.onDataOverSerial(data);
+		});
+	});
+}
+
+var sendDataOverSerial = function(buffer)
+{
+// calling write if an serport is not connected will crash the server! //
+	if (serport){
+		serport.write(buffer, function(e, results) {
+			if (e) {
+				console.log('error :: ' + e);
+			}	else{
+			//	console.log('message successfully sent');
+			}
+		});
+	}
+}
+
+detectSerialOnOSX();

modules/socket_server.js

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+var sockets;
+var serport = require('./serial_node');
+var activeUser;
+
+/*
+	TODO - need to store the current animation & autoMode setting on the server
+*/
+
+exports.init = function(io){
+	
+	sockets = io.sockets;
+	io.set('log level', 1);
+	sockets.on('connection', function (socket) {
+	// only allow the most recent connected user to interact with serial //
+		activeUser = socket;
+	// tell client they have successfully connected to the server and wait for their response //
+		socket.emit('connected-to-server', {
+			// transmit current status
+		});
+	// listen for the client to tell us who they are //
+		socket.on('connected-client-response', function(data){
+			socket.user = data;
+			onUserConnected(socket);
+		});
+	// transmit info about the server on request
+		socket.on('request-server-info', function (data) {
+			socket.emit('server-info-response', { serialPort: serport.getPath() });
+		});
+	});
+};
+
+exports.onDataOverSerial = function(data){
+	console.log('onDataOverSerial', data);
+	// process data received
+};
+
+var onUserConnected = function(socket)
+{
+	serport.writeNumber(socket.user.id);
+	// here comes socket.on('something-happens', ...)
+}

package.json

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+{
+	"name": "node-led",
+	"version": "0.0.1",
+	"author": {
+		"name": "Stephen Braitsch",
+		"email": "stephen@fuseproject.com"
+	},
+	"repository": {
+		"type": "git",
+		"url": "git@github.com:fuseproject/node-led.git"
+	},
+	"private": true,
+	"dependencies": {
+		"express": "3.1.0",
+		"jade": "0.28.1",
+		"stylus": "0.32.0",
+		"socket.io": "0.9.12",
+		"serialport": "https://github.com/voodootikigod/node-serialport/tarball/master"
+	},
+	"engines": {
+		"node": "0.8.18",
+		"npm":  "1.2.2"
+	}
+}

public/css/style.styl

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+raiseText()
+	color grey
+	text-shadow: -1px 1px 0 white
+	-moz-text-shadow: -1px 1px 0 white
+	-webkit-text-shadow: -1px 1px 0 white
+
+html, body
+	margin 0
+	padding 0
+
+body
+	height 100%
+	background-color #EEE
+	
+.navbar-inner
+	padding 0
+
+.navbar-inner .brand
+	width 100%
+	margin 0
+	text-align center
+
+.navbar .brand
+	padding 10px 0 10px 0
+	
+#wrapper
+	padding 15px 50px 0 50px
+	margin auto
+
+footer
+	text-align center
+	padding 30px 0
+	margin-top 70px
+	border-top 1px solid #e5e5e5
+	background-color #f5f5f5
+
+.footer p
+	margin-bottom 0
+	color #777

public/js/index.js

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+
+$(document).ready(function(){
+
+	$('#wrapper #serialtalk #serialtalk-btn').click(function(e){
+		// handle the button press
+		/* useful fns: $(e.target).attr('id') .addClass('btn-warning')
+			if (socket && socket_connected){
+				socket.emit('animation-selected', { id:n });
+			}
+		 */
+	});	
+});

public/js/socket_client.js

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+var socket = io.connect('/');
+var socket_connected = false;
+var autoMode;
+
+socket.on('connected-to-server', function (data) {
+
+// update the view based with the current server settings //
+	
+// generate a random id for this newly connected user //
+	var id = Math.floor(Math.random()*9999);
+	$('#user-id').html('Connected : <span style="color:blue">'+id+'</span>');
+	socket_connected = true;
+	socket.emit('connected-client-response', { id:id });
+	socket.emit('request-server-info', {});
+});
+
+socket.on('server-info-response', function (data) {
+	$('footer #serial-port-elt').html('<span>'+data.serialPort+'</span>');
+});

views/index.jade

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+extends layout
+
+block content
+	.navbar
+		.navbar-inner
+			#user-id.brand
+	#wrapper
+		#serialtalk(style="text-align: center;")
+			//form.form-inline
+			.input-append
+				input#serialtalk-text.span2(type="text", placeholder="LLAP message")
+				button#serialtalk-btn.btn Send
+			p Last response: 
+				span#serialtalk-resp nothing yet
+
+block footer
+	p	<strong>Server info:</strong>&nbsp;
+		| #{process.title}:[#{process.version}]
+		| serial-port:[
+		span#serial-port-elt
+		|]
+
+
+block scripts
+	script(src='/js/index.js')
+	script(src="/socket.io/socket.io.js")
+	script(src='/js/socket_client.js')

views/layout.jade

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+!!! 5
+html
+	head
+		title Node LED
+		link(rel='stylesheet', href='/vendor/bootstrap.min.css')
+		link(rel='stylesheet', href='/css/style.css')
+		meta(http-equiv="cache-control", content="no-cache")
+		meta(name="apple-touch-fullscreen", content="yes")
+		meta(name="apple-mobile-web-app-capable", content="yes")
+		meta(name="apple-mobile-web-app-status-bar-style", content="black")
+		meta(name="viewport", content="initial-scale=1.0, maximum-scale=1.0, user-scalable=0")
+	body
+		block content
+		footer.footer
+			block footer
+		script(src='/vendor/jquery-1.9.0.min.js')
+		block scripts