diff --git a/PrinterConnection.py b/PrinterConnection.py
index 86ea0fbf60..b155700843 100644
--- a/PrinterConnection.py
+++ b/PrinterConnection.py
@@ -7,7 +7,11 @@ import queue
 import re
 import functools
 
-class PrinterConnection():
+from UM.Application import Application
+from UM.Signal import Signal, SignalEmitter
+
+
+class PrinterConnection(SignalEmitter):
     def __init__(self, serial_port):
         super().__init__()
         
@@ -156,15 +160,27 @@ class PrinterConnection():
         except Exception as e:
             return False
     
+    
+    
     def setIsConnected(self, state):
         self._is_connecting = False
         if self._is_connected != state:
             self._is_connected = state
+            self.connectionStateChanged.emit(self._serial_port)
+            if self._is_connected: 
+                self._listen_thread.start() #Start listening
+                '''Application.getInstance().addOutputDevice(self._serial_port, {
+                    'id': self._serial_port,
+                    'function': self.printGCode,
+                    'description': 'Print with USB {0}'.format(self._serial_port),
+                    'icon': 'print_usb',
+                    'priority': 1
+                })'''
+                
         else:
             Logger.log('w', "Printer connection state was not changed")
             
-        if self._is_connected:
-             self._listen_thread.start() #Start listening
+    connectionStateChanged = Signal()    
     
     ##  Close the printer connection    
     def close(self):
@@ -251,7 +267,8 @@ class PrinterConnection():
                     pass
                 if b'B:' in line: #Check if it's a bed temperature
                     try:
-                        print("BED TEMPERATURE" ,float(re.search(b"B: *([0-9\.]*)", line).group(1)))
+                        #print("BED TEMPERATURE" ,float(re.search(b"B: *([0-9\.]*)", line).group(1)))
+                        pass
                     except:
                         pass
                 #TODO: temperature changed callback
@@ -306,7 +323,7 @@ class PrinterConnection():
                 if self._current_z != z:
                     self._current_z = z
         except Exception as e:
-            self._log("Unexpected error: %s" % e)
+            Logger.log('e', "Unexpected error: %s" % e)
         checksum = functools.reduce(lambda x,y: x^y, map(ord, 'N%d%s' % (self._gcode_position, line)))
         
         self._sendCommand("N%d%s*%d" % (self._gcode_position, line, checksum))
diff --git a/USBPrinterManager.py b/USBPrinterManager.py
index 15db396b72..e4526ef095 100644
--- a/USBPrinterManager.py
+++ b/USBPrinterManager.py
@@ -1,7 +1,9 @@
 from UM.Signal import Signal, SignalEmitter
 from UM.PluginObject import PluginObject
 from . import PrinterConnection
-
+from UM.Application import Application
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+from UM.Scene.SceneNode import SceneNode
 import threading
 import platform
 import glob
@@ -41,11 +43,15 @@ class USBPrinterManager(SignalEmitter,PluginObject):
                 for serial_port in self._serial_port_list:
                     if self.getConnectionByPort(serial_port) is None: #If it doesn't already exist, add it
                         if not os.path.islink(serial_port): #Only add the connection if it's a non symbolic link
-                            self._printer_connections.append(PrinterConnection.PrinterConnection(serial_port))
+                            connection = PrinterConnection.PrinterConnection(serial_port)
+                            connection.connect()
+                            connection.connectionStateChanged.connect(self.serialConectionStateCallback)
+                            self._printer_connections.append(connection)
                 
                 for serial_port in disconnected_ports: # Close connections and remove them from list.
                     connection = self.getConnectionByPort(serial_port)
-                    connection.close()
+                    if connection != None:
+                        connection.close()
                     self._printer_connections.remove(connection)
             time.sleep(5) #Throttle, as we don't need this information to be updated every single second.        
     
@@ -93,7 +99,28 @@ class USBPrinterManager(SignalEmitter,PluginObject):
             return True
         else: 
             return False
+        
+        
+    def serialConectionStateCallback(self,serial_port):
+        connection = self.getConnectionByPort(serial_port)
+        if connection.isConnected():
+            Application.getInstance().addOutputDevice(serial_port, {
+                'id': serial_port,
+                'function': self._writeToSerial,
+                'description': 'Write to USB {0}'.format(serial_port),
+                'icon': 'print_usb',
+                'priority': 1
+            })
     
+    def _writeToSerial(self, serial_port):
+        for node in DepthFirstIterator(Application.getInstance().getController().getScene().getRoot()):
+            if type(node) is not SceneNode or not node.getMeshData():
+                continue
+            
+            gcode = getattr(node.getMeshData(), 'gcode', False)
+            self.sendGCodeByPort(serial_port,gcode.split('\n'))
+            
+        
     ## Get a list of printer connection objects that are connected.
     def getActiveConnections(self):
         return [connection for connection in self._printer_connections if connection.isConnected()]