diff --git a/nodejs/ar-com/arduino.js b/nodejs/ar-com/arduino.js
index f49e9f3..e818b0a 100644
--- a/nodejs/ar-com/arduino.js
+++ b/nodejs/ar-com/arduino.js
@@ -10,35 +10,36 @@ var Arduino = function (baudrate) {
 }
 
 Arduino.prototype.setup = function () {
+  var self = this;
   child.exec('cd ../arduino && ino build && ino upload', function(err, stdout, stderr){
     
-    if(err){console.log('Please install the ino utility and connect arduino!\nIf there are other open programs that communicate with the arduino, close them!'); return this.success = false;}
+    if(err){console.log('Please install the ino utility and connect arduino!\nIf there are other open programs that communicate with the arduino, close them!'); return self.success = false;}
 
     var buff = stdout.slice(stdout.indexOf('Guessing serial port ... ')+25);
     buff = buff.slice(0, buff.indexOf('\n'));
     console.log('Guessing serial port ... ' + buff);
 
-    this.serial = new serial(buff, {
-      baudrate: this.baudrate,
+    self.serial = new serial(buff, {
+      baudrate: self.baudrate,
       parser: serial.parsers.readline('\n')
     }, false);
     
-    this.serial.open(function (error) {
+    self.serial.open(function (error) {
       if ( error ) {
         console.log('Please check arduino!')
-        return this.success = false;
+        return self.success = false;
       }
 
       serialPort.write(new Buffer('00000000'));
     });
-    
-    this.success = true;
-    this.processWriteBuffer();    
+
+    self.success = true;
+    self.processWriteBuffer();    
   });
 }
 
 Arduino.prototype.write = function (m) {
-  if (this.success) {
+  if (this.serial) {
     this.serial.write(m);
   } else {
     this.writeBuffer.push(m);
diff --git a/nodejs/routes/index.js b/nodejs/routes/index.js
index 66f1b18..223c30c 100644
--- a/nodejs/routes/index.js
+++ b/nodejs/routes/index.js
@@ -3,7 +3,7 @@ var router = express.Router();
 var Arduino = new require('../ar-com/arduino');
 var arduino = new Arduino();
 
-arduino.setup()
+arduino.setup();
 
 /* GET home page. */ 
 router.get('/', function(req, res, next) {