diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Overview/notifications/Notification.java b/app/src/main/java/info/nightscout/androidaps/plugins/Overview/notifications/Notification.java
index 23e9ec9643..3d2cb435fd 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Overview/notifications/Notification.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Overview/notifications/Notification.java
@@ -68,6 +68,7 @@ public class Notification {
     public static final int NSMALFUNCTION = 40;
     public static final int NEWVERSIONDETECTED = 41;
     public static final int SENDLOGFILES = 42;
+    public static final int DEVICENOTPAIRED = 43;
 
 
     public int id;
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/BLEComm.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/BLEComm.java
index be241dbbfd..fcd65bbb1e 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/BLEComm.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/BLEComm.java
@@ -662,7 +662,13 @@ public class BLEComm {
 
     private void SendPumpCheck() {
         // 1st message sent to pump after connect
-        byte[] bytes = BleCommandUtil.getInstance().getEncryptedPacket(BleCommandUtil.DANAR_PACKET__OPCODE_ENCRYPTION__PUMP_CHECK, null, getConnectDeviceName());
+        String devicename = getConnectDeviceName();
+        if(devicename == null || devicename == ""){
+            Notification n = new Notification(Notification.DEVICENOTPAIRED, MainApp.gs(R.string.pairfirst), Notification.URGENT);
+            MainApp.bus().post(new EventNewNotification(n));
+            return;
+        }
+        byte[] bytes = BleCommandUtil.getInstance().getEncryptedPacket(BleCommandUtil.DANAR_PACKET__OPCODE_ENCRYPTION__PUMP_CHECK, null, devicename);
         if (L.isEnabled(L.PUMPBTCOMM))
             log.debug(">>>>> " + "ENCRYPTION__PUMP_CHECK (0x00)" + " " + DanaRS_Packet.toHexString(bytes));
         writeCharacteristic_NO_RESPONSE(getUARTWriteBTGattChar(), bytes);
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7846abd514..0bde7cfbb7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1209,6 +1209,7 @@
     <string name="loop_openmode_min_change">Minimal request change [%]</string>
     <string name="loop_openmode_min_change_summary">Loop will popup new change request only if change is bigger than this value. Default value is 20%</string>
     <string name="key_short_tabtitles" translatable="false">short_tabtitles</string>
+    <string name="pairfirst">Please pair your pump with your phone!</string>
 
     <plurals name="objective_days">
         <item quantity="one">%1$d day</item>