diff --git a/app/src/main/java/com/example/co2sense_app/BLEDevice.java b/app/src/main/java/com/example/co2sense_app/BLEDevice.java
index 91a70bb..7b0ec82 100644
--- a/app/src/main/java/com/example/co2sense_app/BLEDevice.java
+++ b/app/src/main/java/com/example/co2sense_app/BLEDevice.java
@@ -134,10 +134,10 @@ public abstract class BLEDevice {
             }
 
             @Override
-            public void onDescriptorRead(@NonNull BluetoothGatt gatt, @NonNull BluetoothGattDescriptor descriptor, int status, @NonNull byte[] value) {
-                super.onDescriptorRead(gatt, descriptor, status, value);
-                mainClass.onDescriptorRead(gatt, descriptor, status);
-                Log.d("bt", "onDescriptorRead: ");
+            public void onCharacteristicRead(@NonNull BluetoothGatt gatt, @NonNull BluetoothGattCharacteristic characteristic, int status) {
+                super.onCharacteristicRead(gatt, characteristic, status);
+                Log.d("bt", "onCharacteristicRead: ");
+                mainClass.onCharacteristicRead(gatt, characteristic, status);
                 commandLock=false;
                 runNextCommand();
             }
@@ -201,6 +201,9 @@ public abstract class BLEDevice {
     protected void onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status){
         eventCallback.onDescriptorRead(gatt, descriptor, status);
     }
+    protected void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status){
+        eventCallback.onCharacteristicRead(gatt, characteristic, status);
+    }
 
     @RequiresApi(api = Build.VERSION_CODES.S)
     public void startScan(ScanCallback callback){
@@ -252,7 +255,7 @@ public abstract class BLEDevice {
 
     @SuppressLint("MissingPermission")
     protected void readCharacteristic(BluetoothGattService service, BluetoothGatt bluetoothGatt, UUID uuid){
-        Log.d("bt", "readCharacteristic: "+uuid);
+        Log.d("bt", "readCharacteristic: "+uuid+":"+bluetoothGatt+":"+service);
         BluetoothGattCharacteristic charact = service.getCharacteristic(uuid);
         commandQueue.add(new Runnable() {
             @Override
diff --git a/app/src/main/java/com/example/co2sense_app/MainActivity.java b/app/src/main/java/com/example/co2sense_app/MainActivity.java
index eeccba3..11cbd34 100644
--- a/app/src/main/java/com/example/co2sense_app/MainActivity.java
+++ b/app/src/main/java/com/example/co2sense_app/MainActivity.java
@@ -74,14 +74,15 @@ public class MainActivity extends AppCompatActivity {
                 }
             }
 
+            @RequiresApi(api = Build.VERSION_CODES.TIRAMISU)
             @Override
-            public void onCharacteristicRead(@NonNull BluetoothGatt gatt, @NonNull BluetoothGattCharacteristic characteristic, @NonNull byte[] value, int status) {
-                super.onCharacteristicRead(gatt, characteristic, value, status);
+            public void onCharacteristicRead(@NonNull BluetoothGatt gatt, @NonNull BluetoothGattCharacteristic characteristic, int status) {
+                super.onCharacteristicRead(gatt, characteristic, status);
                 Log.d("UI_update", "onCharacteristicRead: ");
                 if(characteristic.getUuid().equals(sensor.CHAR_BATT_LEVEL_UUID)){
                     Log.d("UI_update", "onCharacteristicChanged: batt");
                     int val = characteristic.getIntValue(BluetoothGattCharacteristic.FORMAT_UINT8, 0);
-                    CO2_widget.setValue(val);
+                    batt_widget.setValue(val);
                 }
             }
         });