diff --git a/plugins/USBPrinting/PrinterConnection.py b/plugins/USBPrinting/PrinterConnection.py
index b1ac8603cc..c78dcf1697 100644
--- a/plugins/USBPrinting/PrinterConnection.py
+++ b/plugins/USBPrinting/PrinterConnection.py
@@ -123,6 +123,7 @@ class PrinterConnection(OutputDevice, QObject, SignalEmitter):
     progressChanged = pyqtSignal()
     extruderTemperatureChanged = pyqtSignal()
     bedTemperatureChanged = pyqtSignal()
+    firmwareUpdateComplete = pyqtSignal()
 
     endstopStateChanged = pyqtSignal(str ,bool, arguments = ["key","state"])
 
diff --git a/plugins/USBPrinting/USBPrinterManager.py b/plugins/USBPrinting/USBPrinterManager.py
index 1249c454ff..9d9b0b4a02 100644
--- a/plugins/USBPrinting/USBPrinterManager.py
+++ b/plugins/USBPrinting/USBPrinterManager.py
@@ -54,6 +54,15 @@ class USBPrinterManager(QObject, SignalEmitter, OutputDevicePlugin, Extension):
     addConnectionSignal = Signal()
     printerConnectionStateChanged = pyqtSignal()
 
+    progressChanged = pyqtSignal()
+    @pyqtProperty(float, notify = progressChanged)
+    def progress(self):
+        progress = 0
+        for name, connection in self._printer_connections.items():
+            progress += connection.progress
+
+        return progress / len(self._printer_connections)
+
     def start(self):
         self._check_updates = True
         self._update_thread.start()
@@ -91,6 +100,7 @@ class USBPrinterManager(QObject, SignalEmitter, OutputDevicePlugin, Extension):
             try:
                 self._printer_connections[printer_connection].updateFirmware(Resources.getPath(CuraApplication.ResourceTypes.Firmware, self._getDefaultFirmwareName()))
             except FileNotFoundError:
+                Logger.log("w", "No firmware found for printer %s", printer_connection)
                 continue
 
     @pyqtSlot(str, result = bool)
@@ -154,6 +164,7 @@ class USBPrinterManager(QObject, SignalEmitter, OutputDevicePlugin, Extension):
         connection = PrinterConnection.PrinterConnection(serial_port)
         connection.connect()
         connection.connectionStateChanged.connect(self._onPrinterConnectionStateChanged)
+        connection.progressChanged.connect(self.progressChanged)
         self._printer_connections[serial_port] = connection
 
     def _onPrinterConnectionStateChanged(self, serial_port):
@@ -197,4 +208,4 @@ class USBPrinterManager(QObject, SignalEmitter, OutputDevicePlugin, Extension):
                 base_list = base_list + glob.glob("/dev/ttyUSB*") + glob.glob("/dev/ttyACM*") + glob.glob("/dev/cu.*") + glob.glob("/dev/tty.usb*") + glob.glob("/dev/rfcomm*") + glob.glob("/dev/serial/by-id/*")
         return list(base_list)
 
-    _instance = None
\ No newline at end of file
+    _instance = None