diff --git a/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothSenssun.java b/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothSenssun.java
index 45a6e229..3dee577b 100644
--- a/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothSenssun.java
+++ b/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothSenssun.java
@@ -35,8 +35,9 @@ public class BluetoothSenssun extends BluetoothCommunication {
     private final UUID WEIGHT_MEASUREMENT_CHARACTERISTIC = BluetoothGattUuid.fromShortCode(0xfff1); // read, notify
     private final UUID CMD_MEASUREMENT_CHARACTERISTIC = BluetoothGattUuid.fromShortCode(0xfff2); // write only
 
-    private int gotData;
-    private int FatMus = 0;
+    private boolean scaleGotUserData;
+    long firstFixWeight = -1 ;
+    private byte WeightFatMus = 0;
     private ScaleMeasurement measurement;
 
     public BluetoothSenssun(Context context) {
@@ -48,7 +49,16 @@ public class BluetoothSenssun extends BluetoothCommunication {
         return "Senssun";
     }
 
-    private void sendUserData(){
+    @Override
+    protected boolean doScanWhileConnecting() {
+        // Senssun seems to have problem connecting if scan is running (see ##309)
+        return false;
+    }
+
+    private void sendUserData() {
+        if (scaleGotUserData) {
+          return;
+        }
         final ScaleUser selectedUser = OpenScale.getInstance().getSelectedScaleUser();
 
         byte gender = selectedUser.getGender().isMale() ? (byte)0xf1 : (byte)0x01;
@@ -59,7 +69,7 @@ public class BluetoothSenssun extends BluetoothCommunication {
         byte cmdByte[] = {(byte)0xa5, (byte)0x10, gender, age, height, (byte)0, (byte)0x0, (byte)0x0d2, (byte)0x00};
 
         byte verify = 0;
-        for(int i = 1; i < cmdByte.length - 2; i++) {
+        for (int i = 1; i < cmdByte.length - 2; i++) {
             verify = (byte) (verify + cmdByte[i]);
         }
         cmdByte[cmdByte.length - 2] = verify;
@@ -74,7 +84,9 @@ public class BluetoothSenssun extends BluetoothCommunication {
                 setNotificationOn(WEIGHT_MEASUREMENT_SERVICE, WEIGHT_MEASUREMENT_CHARACTERISTIC,
                         BluetoothGattUuid.DESCRIPTOR_CLIENT_CHARACTERISTIC_CONFIGURATION);
                 sendUserData();
-                gotData = 0;
+                firstFixWeight = -1;
+                WeightFatMus = 0;
+                scaleGotUserData = false;
                 break;
             default:
                 // Finish init if everything is done
@@ -100,17 +112,15 @@ public class BluetoothSenssun extends BluetoothCommunication {
         // The first notification only includes weight and all other fields are
         // either 0x00 (user info) or 0xff (fat, water, etc.)
 
-        if (data != null) {
+        if (data != null && !isBitSet(WeightFatMus, 3)) { //only if not saved
             parseBytes(data);
-            if (measurement != null && measurement.getWeight() != 0.0 && gotData == 0) {
-                Timber.d("meas: %s", measurement);
-                addScaleData(measurement);
-                gotData = 1;
-            }
-            if (measurement != null && measurement.getWeight() != 0.0 && FatMus == 0x03 && gotData != 2) {
-                Timber.d("meas: %s", measurement);
-                addScaleData(measurement);
-                gotData = 2;
+            Timber.d("WFM %02X %d ", WeightFatMus, (System.currentTimeMillis() - firstFixWeight));
+            if (isBitSet(WeightFatMus, 2) && firstFixWeight > 0) {
+                if (((System.currentTimeMillis() - firstFixWeight) > 2500 && WeightFatMus == (1 << 2)) //wait 1.5 seconds for Data
+                        || WeightFatMus == 0x07) { // got all Data to save
+                    addScaleData(measurement);
+                    WeightFatMus |= 1 << 3;
+                }
             }
         }
     }
@@ -122,12 +132,23 @@ public class BluetoothSenssun extends BluetoothCommunication {
         int type = weightBytes[6] & 0xff;
         Timber.d("type %02X", type);
         switch (type) {
+            case 0x00:
+                if (weightBytes[2] == (byte)0x10) {
+                    scaleGotUserData = true;
+                }
+                break;
             case 0xa0:
                 sendUserData();
                 break;
             case 0xaa:
                 float weight = Converters.fromUnsignedInt16Be(weightBytes, 2) / 10.0f; // kg
                 measurement.setWeight(weight);
+
+                if (!isBitSet(WeightFatMus, 2)) {
+                    WeightFatMus |= 1 << 2 ;
+                    firstFixWeight = System.currentTimeMillis() ;
+                }
+
                 sendUserData();
                 break;
             case 0xb0:
@@ -135,14 +156,14 @@ public class BluetoothSenssun extends BluetoothCommunication {
                 float water = Converters.fromUnsignedInt16Be(weightBytes, 4) / 10.0f; // %
                 measurement.setFat(fat);
                 measurement.setWater(water);
-                FatMus |= 0x2;
+                WeightFatMus |= 1 << 1;
                 break;
             case 0xc0:
                 float bone = Converters.fromUnsignedInt16Le(weightBytes, 4) / 10.0f; // kg
                 float muscle = Converters.fromUnsignedInt16Be(weightBytes, 2) / 10.0f; // %
                 measurement.setMuscle(muscle);
                 measurement.setBone(bone);
-                FatMus |= 0x1;
+                WeightFatMus |= 1;
                 break;
             case 0xd0:
                 float calorie = Converters.fromUnsignedInt16Be(weightBytes, 2);
@@ -155,8 +176,6 @@ public class BluetoothSenssun extends BluetoothCommunication {
                 //date
                 break;
         }
-
-        //measurement.setDateTime(lastWeighted);
         measurement.setDateTime(new Date());
     }
 }