diff --git a/app/src/main/java/io/pslab/fragment/DustSensorDataFragment.java b/app/src/main/java/io/pslab/fragment/DustSensorDataFragment.java
index 850fdb224..c48c046a8 100644
--- a/app/src/main/java/io/pslab/fragment/DustSensorDataFragment.java
+++ b/app/src/main/java/io/pslab/fragment/DustSensorDataFragment.java
@@ -107,6 +107,8 @@ public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup c
         scienceLab = ScienceLabCommon.scienceLab;
         entries = new ArrayList<>();
         setupInstruments();
+        if(!scienceLab.isConnected())
+            Toast.makeText(getContext(), R.string.not_connected, Toast.LENGTH_SHORT).show();
         return rootView;
     }
 
@@ -388,8 +390,6 @@ private void visualizeData() {
                 mChart.moveViewToX(data.getEntryCount());
                 mChart.invalidate();
             }
-        } else {
-            Toast.makeText(getContext(), R.string.not_connected, Toast.LENGTH_SHORT).show();
         }
     }