diff --git a/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothOneByone.java b/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothOneByone.java
index 74f58095..bf85e6c2 100644
--- a/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothOneByone.java
+++ b/android_app/app/src/main/java/com/health/openscale/core/bluetooth/BluetoothOneByone.java
@@ -20,18 +20,21 @@ import android.bluetooth.BluetoothGatt;
 import android.bluetooth.BluetoothGattCharacteristic;
 import android.content.Context;
 
+import com.health.openscale.core.OpenScale;
 import com.health.openscale.core.datatypes.ScaleMeasurement;
+import com.health.openscale.core.datatypes.ScaleUser;
 import com.health.openscale.core.utils.Converters;
 
 import java.util.UUID;
 
+import timber.log.Timber;
+
 public class BluetoothOneByone extends BluetoothCommunication {
     private final UUID WEIGHT_MEASUREMENT_SERVICE_BODY_COMPOSITION = UUID.fromString("0000181B-0000-1000-8000-00805f9b34fb");
     private final UUID WEIGHT_MEASUREMENT_CHARACTERISTIC_BODY_COMPOSITION = UUID.fromString("00002A9C-0000-1000-8000-00805f9b34fb"); // read, indication
 
     private final UUID WEIGHT_MEASUREMENT_SERVICE = UUID.fromString("0000fff0-0000-1000-8000-00805f9b34fb");
     private final UUID CMD_MEASUREMENT_CHARACTERISTIC = UUID.fromString("0000fff1-0000-1000-8000-00805f9b34fb"); // write only
-    private final UUID CMD_MEASUREMENT_CUSTOM_CHARACTERISTIC = UUID.fromString("0000fff4-0000-1000-8000-00805f9b34fb"); // notify only
     private final UUID WEIGHT_MEASUREMENT_CONFIG = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
 
     public BluetoothOneByone(Context context) {
@@ -50,7 +53,20 @@ public class BluetoothOneByone extends BluetoothCommunication {
                 setIndicationOn(WEIGHT_MEASUREMENT_SERVICE_BODY_COMPOSITION, WEIGHT_MEASUREMENT_CHARACTERISTIC_BODY_COMPOSITION, WEIGHT_MEASUREMENT_CONFIG);
                 break;
             case 1:
-                byte[] magicBytes = {(byte)0xfd,(byte)0x37,(byte)0x01,(byte)0x01,(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x00};
+                ScaleUser currentUser = OpenScale.getInstance().getSelectedScaleUser();
+                byte unit = 0x00; // kg
+                switch (currentUser.getScaleUnit()) {
+                    case LB:
+                        unit = 0x01;
+                        break;
+                    case ST:
+                        unit = 0x02;
+                        break;
+                }
+                byte group = 0x01;
+                byte[] magicBytes = {(byte)0xfd, (byte)0x37, unit, group,
+                        (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00,
+                        (byte)0x00, (byte)0x00, (byte)0x00};
                 magicBytes[magicBytes.length - 1] =
                         xorChecksum(magicBytes, 0, magicBytes.length - 1);
                 writeBytes(WEIGHT_MEASUREMENT_SERVICE, CMD_MEASUREMENT_CHARACTERISTIC, magicBytes);
@@ -84,6 +100,9 @@ public class BluetoothOneByone extends BluetoothCommunication {
 
     private void parseBytes(byte[] weightBytes) {
         float weight = Converters.fromUnsignedInt16Le(weightBytes, 11) / 100.0f;
+        int impedance = Converters.fromUnsignedInt24Le(weightBytes, 15);
+
+        Timber.d("weight: %.2f, impedance: %d", weight, impedance);
 
         ScaleMeasurement scaleBtData = new ScaleMeasurement();