diff --git a/i18n/Polish.ts b/i18n/Polish.ts
index dd877fb..5079bde 100644
--- a/i18n/Polish.ts
+++ b/i18n/Polish.ts
@@ -4,94 +4,94 @@
 <context>
     <name>MainWindow</name>
     <message>
-        <location filename="../luftdaten-tool.py" line="138"/>
+        <location filename="../luftdaten-tool.py" line="147"/>
         <source>No boards found</source>
         <translation>Nie znaleziono płytki</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="143"/>
+        <location filename="../luftdaten-tool.py" line="152"/>
         <source>Others...</source>
         <translation>Inne...</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="172"/>
+        <location filename="../luftdaten-tool.py" line="181"/>
         <source>No device selected.</source>
         <translation>Nie wybrano urządzenia.</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="176"/>
+        <location filename="../luftdaten-tool.py" line="185"/>
         <source>No version selected.</source>
         <translation>Nie wybrano wersji.</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="131"/>
+        <location filename="../gui/mainwindow.py" line="130"/>
         <source>Luftdaten.info Flashing Tool</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="132"/>
+        <location filename="../gui/mainwindow.py" line="131"/>
         <source>Board:</source>
         <translation>Płytka:</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="133"/>
+        <location filename="../gui/mainwindow.py" line="132"/>
         <source>Firmware version:</source>
         <translation>Wersja oprogramowania:</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="134"/>
+        <location filename="../gui/mainwindow.py" line="133"/>
         <source>master</source>
         <translation>master</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="135"/>
+        <location filename="../gui/mainwindow.py" line="134"/>
         <source>Upload</source>
         <translation>Wgraj</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="136"/>
+        <location filename="../gui/mainwindow.py" line="135"/>
         <source>Expert mode</source>
         <translation>Tryb eksperta</translation>
     </message>
     <message>
-        <location filename="../gui/mainwindow.py" line="137"/>
+        <location filename="../gui/mainwindow.py" line="136"/>
         <source>Baudrate:</source>
         <translation>Prędkość portu:</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="191"/>
+        <location filename="../luftdaten-tool.py" line="200"/>
         <source>Invalid version / file does not exist</source>
         <translation>Błędna wersja / plik nie istnieje</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="196"/>
+        <location filename="../luftdaten-tool.py" line="205"/>
         <source>Work in progess...</source>
         <translation>Praca w toku...</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="224"/>
+        <location filename="../luftdaten-tool.py" line="233"/>
         <source>Downloading...</source>
         <translation>Pobieranie...</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="235"/>
+        <location filename="../luftdaten-tool.py" line="244"/>
         <source>Connecting...</source>
         <translation>Łączenie...</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="240"/>
-        <source>Done. Chip type: %s</source>
-        <translation>Zrobione. Typ układu: %s</translation>
+        <location filename="../luftdaten-tool.py" line="249"/>
+        <source>Connected. Chip type: {chip_type}</source>
+        <translation>Połączono. Typ układu: {chip_type}</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="258"/>
-        <source>Writing at 0x%08x...</source>
-        <translation>Zapisywanie pod adresem 0x%08x...</translation>
+        <location filename="../luftdaten-tool.py" line="267"/>
+        <source>Writing at 0x{address:08x}...</source>
+        <translation>Zapisywanie pod adresem 0x{address:08x}...</translation>
     </message>
     <message>
-        <location filename="../luftdaten-tool.py" line="268"/>
-        <source>Finished in %.2f seconds</source>
-        <translation>Zrobione w %.2f sekundy</translation>
+        <location filename="../luftdaten-tool.py" line="278"/>
+        <source>Finished in {time:.2f} seconds. Sensor ID: {sensor_id}</source>
+        <translation>Zakończono w {time:.2f} sekundy. ID sensora: {sensor_id}</translation>
     </message>
 </context>
 </TS>
diff --git a/luftdaten-tool.py b/luftdaten-tool.py
index 298fc40..6688aa7 100644
--- a/luftdaten-tool.py
+++ b/luftdaten-tool.py
@@ -246,8 +246,8 @@ class MainWindow(QtWidgets.QMainWindow, mainwindow.Ui_MainWindow):
         init_baud = min(ESPLoader.ESP_ROM_BAUD, baudrate)
         esp = ESPLoader.detect_chip(device, init_baud, 'default_reset', False)
 
-        progress.emit(self.tr('Done. Chip type: %s') %
-                      esp.get_chip_description(), 0)
+        progress.emit(self.tr('Connected. Chip type: {chip_type}').format(
+                      chip_type=esp.get_chip_description()), 0)
         esp = esp.run_stub()
         esp.change_baud(baudrate)
 
@@ -264,7 +264,8 @@ class MainWindow(QtWidgets.QMainWindow, mainwindow.Ui_MainWindow):
         t = time.time()
         while len(image) > 0:
             current_addr = address + seq * esp.FLASH_WRITE_SIZE
-            progress.emit(self.tr('Writing at 0x%08x...') % (current_addr,),
+            progress.emit(self.tr('Writing at 0x{address:08x}...').format(
+                          address=current_addr),
                           100 * (seq + 1) // blocks)
 
             block = image[0:esp.FLASH_WRITE_SIZE]
@@ -274,12 +275,15 @@ class MainWindow(QtWidgets.QMainWindow, mainwindow.Ui_MainWindow):
             written += len(block)
         t = time.time() - t
 
-        progress.emit(self.tr('Finished in %.2f seconds') % (t,), 100)
+        progress.emit(self.tr(
+            'Finished in {time:.2f} seconds. Sensor ID: {sensor_id}').format(
+                time=t, sensor_id=esp.chip_id()), 100)
 
     @QtCore.Slot()
     def on_expertModeBox_clicked(self):
         self.expertForm.setVisible(self.expertModeBox.checkState())
-        self.centralwidget.setFixedHeight(self.centralwidget.sizeHint().height())
+        self.centralwidget.setFixedHeight(
+            self.centralwidget.sizeHint().height())
         self.setFixedHeight(self.sizeHint().height())