Index: sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml
===================================================================
diff -u -r380136967ba230affe91f614a9805319688eb05b -r015a7cea7842d589a11325a989436be342b801ef
--- sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision 380136967ba230affe91f614a9805319688eb05b)
+++ sources/gui/qml/pages/settings/SettingsDeviceRegistration.qml	(.../SettingsDeviceRegistration.qml)	(revision 015a7cea7842d589a11325a989436be342b801ef)
@@ -121,9 +121,9 @@
         y                   : _root.topMargin
         anchors.right       : parent.right
         anchors.rightMargin : _root.rightMargin
-
-        completeText    : qsTr("Registration complete")
-        stepNames       : [
+        completeVisible     : vCloudSync.isReady
+        completeText        : qsTr("Registration complete")
+        stepNames           : [
             qsTr("Cloud Service is running" ),
             qsTr("Registering the device"   )
         ]
@@ -132,15 +132,29 @@
     TouchRect { id              : _scanButton
         anchors.bottom          : parent.bottom
         anchors.bottomMargin    : Variables.mainMenuHeight * 2 + Variables.minVGap * 2
-        anchors.horizontalCenter:         parent.horizontalCenter
+        anchors.horizontalCenter: parent.horizontalCenter
         text.text               : qsTr("START")
         width                   : 350
         isDefault               : true
         enabled                 : true // ! device device registered
         onClicked               : {
-            vAdjustmentVersions     .doAdjustment()
+            let mHasNetworkConnection   = (_ipAddress_eth0.isValid || _ipAddress_wlan0.isValid)
+            if ( ! mHasNetworkConnection) { _root.notificationText = qsTr("No Network Connection"); return }
+
+            let mHasSerials             = ( _serial_HD != "" && _serial_DG != "")
+            if ( ! mHasSerials          ) { _root.notificationText = qsTr("No device Serial"     ); return }
+
+            vCloudSync              .doRegister  ()
         } // start device registration
     }
 
+    // Connections { target: vCloudSync
+    //     function onselfTestConsumables_primeEntered         ( vValue ) {/*      _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vValue )*/    }
+    //     function onSelfTestConsumables_biCarbPumpEntered    ( vValue ) {        _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vValue       )}
+    //     function onSelfTestConsumables_biCarbPumpEntered    ( vValue ) {        _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vValue       )}
+    //     function onSelfTestConsumables_biCarbPumpEntered    ( vValue ) {        _preTreatmentConsumablesSelfTest.checkList.setItem( 0, vValue       )}
+    //     function onSelfTestConsumables_acidPumpEntered      ( vValue ) {        _preTreatmentConsumablesSelfTest.checkList.setItem( 1, vValue       )}
+    // }
+
     notificationText: ""
 }