diff --git a/lib/Controller.js b/lib/Controller.js
index 80d8620..3193901 100644
--- a/lib/Controller.js
+++ b/lib/Controller.js
@@ -1,9 +1,9 @@
-var events = require('events'),
-    fs     = require('fs'),
-    moment = require('moment'),
-    path   = require('path'),
-    serial = require('serialport'),
-    util   = require('util');
+var events     = require('events'),
+    fs         = require('fs'),
+    moment     = require('moment'),
+    path       = require('path'),
+    SerialPort = require('serialport'),
+    util       = require('util');
 
 var PID = require('./pid');
 
@@ -28,13 +28,14 @@ function Controller(settings) {
 
     self.history = [];
 
-    self.port = new serial.SerialPort(settings.deviceName, {
+    self.port = new SerialPort(settings.deviceName, {
         baudRate : 115200,
-        parser   : serial.parsers.readline('\n')
+        parser   : SerialPort.parsers.readline('\n')
     });
 
-    self.port.on('open', self._onPortOpen.bind(self));
-    self.port.on('data', self._onPortData.bind(self));
+    self.port.on('open' , self._onPortOpen.bind(self));
+    self.port.on('error', self._onPortError.bind(self));
+    self.port.on('data' , self._onPortData.bind(self));
 
     self._isFirstLine = true;
 
@@ -191,6 +192,13 @@ Controller.prototype._sendCommand = function(command, cb) {
     var self = this;
 
     self.port.write(command + '\r\n', function(err) {
+        if (err) {
+            self.emit('log', util.format(
+                'Error sending command "%s": %s',
+                command,
+                err.message
+            ));
+        }
         if (typeof cb === 'function') {
             cb(err);
         }
@@ -209,6 +217,20 @@ Controller.prototype._onPortOpen = function() {
     });
 };
 
+Controller.prototype._onPortError = function(err) {
+    var self = this;
+
+    console.error(
+        'Serial port error:  %s',
+        err.message
+    );
+    console.error(
+        'Check the serial device name and make sure it\'s connected.'
+    );
+    console.error();
+    throw err;
+};
+
 Controller.prototype._onPortData = function(line) {
     var self = this;
 
diff --git a/package.json b/package.json
index 929b2ac..826c9d5 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
         "express"     : "^4.13.4",
         "js-yaml"     : "^3.6.1",
         "moment"      : "^2.13.0",
-        "serialport"  : "^3.1.2",
+        "serialport"  : "^4.0.7",
         "split"       : "^1.0.0"
     }
 }