diff --git a/app/cfg.json b/app/cfg.json
new file mode 100644
index 0000000..e784606
--- /dev/null
+++ b/app/cfg.json
@@ -0,0 +1,35 @@
+{
+	"version" : "0.0.7",
+	"ext_port" : 1111,
+	"arduino" : {
+		"baud" : 57600,
+		"board" : "uno",
+		"serialDelay" : 20,
+		"sequenceDelay" : 100,
+		"cam" : {
+			"time" : 750,
+			"delay" : 50,
+			"momentary" : 300
+		},
+		"proj" : {
+			"time" : 1300,
+			"delay" : 50,
+			"momentary" : 300
+		},
+		"black" : {
+			"before" : 250,
+			"after" : 250
+		},
+		"cmd" : {
+			"debug" : "d",
+			"connect":  "i",
+			"camera" : "c",
+			"projector" : "p",
+			"black" : "b",
+			"cam_forward" : "e",
+			"cam_backward" : "f",
+			"proj_forward" : "g",
+			"proj_backward" : "h"
+		}
+	}
+}
\ No newline at end of file
diff --git a/app/index.html b/app/index.html
index 2906663..7d17278 100644
--- a/app/index.html
+++ b/app/index.html
@@ -9,5 +9,7 @@
     We are using node <script>document.write(process.versions.node)</script>,
     Chromium <script>document.write(process.versions.chrome)</script>,
     and Electron <script>document.write(process.versions.electron)</script>.
+
+    <script src="./js/index.js"></script>
   </body>
 </html>
\ No newline at end of file
diff --git a/app/js/index.js b/app/js/index.js
new file mode 100644
index 0000000..026fdf6
--- /dev/null
+++ b/app/js/index.js
@@ -0,0 +1,10 @@
+var ipcRenderer = require('electron').ipcRenderer,
+	light = {};
+//console.log(ipcRenderer.sendSync('light', { 'fuck' : true }) );
+
+
+light.set = function (color) {
+	'use strict';
+	console.log('color: ' + color.join(','));
+	ipcRenderer.sendSync('light', color);
+};
diff --git a/app/main.js b/app/main.js
index 0f14007..c0893b1 100644
--- a/app/main.js
+++ b/app/main.js
@@ -1,51 +1,152 @@
 'use strict';
+const electron = require('electron'),
+	fs = require('fs'),
+	Menu = require('menu'),
+	ipcMain = require('electron').ipcMain,
+	app = electron.app,
+	BrowserWindow = electron.BrowserWindow,
+	uuid = require('node-uuid'),
+	serialport = require('serialport'),
+	SerialPort = serialport.SerialPort,
+	mcopy = {};
 
-const electron = require('electron');
-// Module to control application life.
-const app = electron.app;
-// Module to create native browser window.
-const BrowserWindow = electron.BrowserWindow;
-
-// Keep a global reference of the window object, if you don't, the window will
-// be closed automatically when the JavaScript object is garbage collected.
 let mainWindow;
 
-function createWindow () {
-  // Create the browser window.
-  mainWindow = new BrowserWindow({width: 800, height: 600});
+var init = function () {
+	mcopy.cfg = JSON.parse(fs.readFileSync('./cfg.json', 'utf8'));
+	createWindow();
+};
 
-  // and load the index.html of the app.
-  mainWindow.loadURL('file://' + __dirname + '/index.html');
+var createMenu = function () {
 
-  // Open the DevTools.
-  mainWindow.webContents.openDevTools();
+};
 
-  // Emitted when the window is closed.
-  mainWindow.on('closed', function() {
-    // Dereference the window object, usually you would store windows
-    // in an array if your app supports multi windows, this is the time
-    // when you should delete the corresponding element.
-    mainWindow = null;
-  });
+var createWindow = function () {
+	mainWindow = new BrowserWindow({width: 800, height: 600});
+	mainWindow.loadURL('file://' + __dirname + '/index.html');
+	mainWindow.webContents.openDevTools();
+	mainWindow.on('closed', function() {
+		mainWindow = null;
+	});
 }
 
-// This method will be called when Electron has finished
-// initialization and is ready to create browser windows.
-app.on('ready', createWindow);
+app.on('ready', init);
 
-// Quit when all windows are closed.
 app.on('window-all-closed', function () {
-  // On OS X it is common for applications and their menu bar
-  // to stay active until the user quits explicitly with Cmd + Q
-  if (process.platform !== 'darwin') {
-    app.quit();
-  }
+	if (process.platform !== 'darwin') {
+		app.quit();
+	}
 });
 
 app.on('activate', function () {
-  // On OS X it's common to re-create a window in the app when the
-  // dock icon is clicked and there are no other windows open.
-  if (mainWindow === null) {
-    createWindow();
-  }
-});
\ No newline at end of file
+	if (mainWindow === null) {
+		createWindow();
+	}
+});
+
+ipcMain.on('light', function(event, arg) {
+	//
+	event.returnValue = true;
+});
+
+/******
+	Arduino handlers
+*******/
+mcopy.arduino = {
+	path : '',
+	known: [
+		'/dev/tty.usbmodem1a161', 
+		'/dev/tty.usbserial-A800f8dk', 
+		'/dev/tty.usbserial-A900cebm', 
+		'/dev/tty.usbmodem1a131',
+		'/dev/tty.usbserial-a900f6de',
+		'/dev/tty.usbmodem1a141'
+	],
+	serial : {},
+	baud : 57600,
+	queue : {},
+	timer : 0,
+	lock : false
+};
+mcopy.arduino.init = function (callback) {
+	mcopy.log('Searching for devices...');
+	var cmd = 'ls /dev/tty.*';
+	exec(cmd, function (e, std) {
+		var devices = std.split('\n'),
+			matches = [];
+		devices.pop();
+		for (var i = 0; i < devices.length; i++) {
+			if (devices[i].indexOf('usbserial') !== -1
+				||devices[i].indexOf('usbmodem') !== -1){
+				matches.push(devices[i]);
+			}
+		}
+		if (matches.length === 0) {
+			mcopy.log('No devices found.');
+			mcopy.gui.spinner(false);
+			mcopy.gui.overlay(true);
+			if (callback) { callback(false); }
+		} else if (matches.length > 0) {
+			mcopy.log('Found ' + matches[0]);
+			mcopy.arduino.path = matches[0];
+			//once connected to the arduino
+			//start user interface
+			if (callback) { callback(true); }
+		}
+	});
+};
+//commands which respond to a sent char
+mcopy.arduino.send = function (cmd, res) {
+	if (!mcopy.arduino.lock) {
+		mcopy.arduino.lock = true;
+		mcopy.arduino.queue[cmd] = res;
+		setTimeout(function () {
+			mcopy.arduino.serial.write(cmd, function (err, results) {
+				if (err) { mcopy.log(err, 0); }
+				mcopy.arduino.lock = false;
+				mcopy.arduino.timer = new Date().getTime();
+			});
+		}, mcopy.cfg.arduino.serialDelay);
+	}
+};
+//with same over serial when done
+mcopy.arduino.end = function (data) {
+	var end = new Date().getTime(),
+		ms = end - mcopy.arduino.timer;
+	if (mcopy.arduino.queue[data] !== undefined) {
+		mcopy.arduino.lock = false;
+		mcopy.log('Command ' + data + ' took ' + ms + 'ms');
+		mcopy.arduino.queue[data](ms);
+
+		mcopy.arduino.queue = {};
+	} else {
+		//console.log('Received stray "' + data + '" from ' + mcopy.arduino.path); //silent to user
+	}
+};
+mcopy.arduino.connect = function (callback) {
+	mcopy.log('Connecting to ' + mcopy.arduino.path + '...');
+	mcopy.state.arduino = mcopy.arduino.path;
+	mcopy.arduino.serial = new SerialPort(mcopy.arduino.path, {
+	  baudrate: mcopy.cfg.arduino.baud,
+	  parser: sp.parsers.readline("\n")
+	});
+	mcopy.arduino.serial.open(function (error) {
+		if ( error ) {
+			return mcopy.log('failed to open: '+ error, 0);
+		} else {
+			mcopy.log('Opened connection with ' + mcopy.arduino.path);
+			mcopy.arduino.serial.on('data', function (data) {
+				data = data.replace('\r', '');
+				mcopy.arduino.end(data);
+			});
+			setTimeout(function () {
+				mcopy.log('Verifying firmware...');
+				mcopy.arduino.send(mcopy.cfg.arduino.cmd.connect, function () {
+					mcopy.log('Firmware verified');
+					mcopy.log('Optical printer ready!');
+					if (callback) { callback(); }
+				});
+			}, 2000);
+		}
+	});
+};
diff --git a/app/package.json b/app/package.json
index 70a0049..a3539aa 100644
--- a/app/package.json
+++ b/app/package.json
@@ -29,6 +29,7 @@
   },
   "dependencies": {
     "node-notifier": "^4.5.0",
-    "node-uuid": "^1.4.7"
+    "node-uuid": "^1.4.7",
+    "serialport": "^2.1.0"
   }
 }