diff --git a/ino/commands/upload.py b/ino/commands/upload.py
index 0659e05..08d7272 100644
--- a/ino/commands/upload.py
+++ b/ino/commands/upload.py
@@ -57,25 +57,28 @@ def run(self, args):
             # if v1 is not specifid explicitly avrdude will
             # try v2 first and fail
             protocol = 'stk500v1'
-
-        if not os.path.exists(port):
-            raise Abort("%s doesn't exist. Is Arduino connected?" % port)
-
-        # send a hangup signal when the last process closes the tty
-        file_switch = '-f' if platform.system() == 'Darwin' else '-F'
-        ret = subprocess.call([self.e['stty'], file_switch, port, 'hupcl'])
-        if ret:
-            raise Abort("stty failed")
-
-        # pulse on DTR
-        try:
-            s = Serial(port, 115200)
-        except SerialException as e:
-            raise Abort(str(e))
-        s.setDTR(False)
-        sleep(0.1)
-        s.setDTR(True)
-        s.close()
+        
+        if port == 'usb':
+        	pass
+    	else:
+            if not os.path.exists(port):
+                raise Abort("%s doesn't exist. Is Arduino connected?" % port)
+    
+            # send a hangup signal when the last process closes the tty
+            file_switch = '-f' if platform.system() == 'Darwin' else '-F'
+            ret = subprocess.call([self.e['stty'], file_switch, port, 'hupcl'])
+            if ret:
+                raise Abort("stty failed")
+    
+            # pulse on DTR
+            try:
+                s = Serial(port, 115200)
+            except SerialException as e:
+                raise Abort(str(e))
+            s.setDTR(False)
+            sleep(0.1)
+            s.setDTR(True)
+            s.close()
 
         # Need to do a little dance for Leonardo and derivatives:
         # open then close the port at the magic baudrate (usually 1200 bps) first
@@ -126,13 +129,24 @@ def run(self, args):
             port = new_port
 
         # call avrdude to upload .hex
-        subprocess.call([
-            self.e['avrdude'],
-            '-C', self.e['avrdude.conf'],
-            '-p', board['build']['mcu'],
-            '-P', port,
-            '-c', protocol,
-            '-b', board['upload']['speed'],
-            '-D',
-            '-U', 'flash:w:%s:i' % self.e['hex_path'],
-        ])
+        if port == 'usb':
+            subprocess.call([
+                self.e['avrdude'],
+                '-C', self.e['avrdude.conf'],
+                '-p', board['build']['mcu'],
+                '-P', port,
+                '-c', protocol,
+                '-b', board['upload']['speed'],
+                '-U', 'flash:w:%s:i' % self.e['hex_path'],
+            ])
+        else:
+            subprocess.call([
+                self.e['avrdude'],
+                '-C', self.e['avrdude.conf'],
+                '-p', board['build']['mcu'],
+                '-P', port,
+                '-c', protocol,
+                '-b', board['upload']['speed'],
+                '-D',
+                '-U', 'flash:w:%s:i' % self.e['hex_path'],
+            ])