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 private void OnAdvertisementReceived(BluetoothLEAdvertisementWatcher sender,
    BluetoothLEAdvertisementReceivedEventArgs advertisementArg)
{
    Debug.WriteLine(" serviceUuids for advertisement " + advertisementArg.Advertisement.ServiceUuids.Count);
    foreach(Guid guid in advertisementArg.Advertisement.ServiceUuids)
    {
        Debug.WriteLine("uuid is " + guid.ToString() + " address is " +advertisementArg.BluetoothAddress+ " name is "+ advertisementArg.Advertisement.LocalName);
    }

                IList<BluetoothLEAdvertisementDataSection> dataSection = advertisementArg.Advertisement.DataSections;

                foreach (BluetoothLEAdvertisementDataSection ad in dataSection)
            {
           );

                if (ad.Data.Length > 0)
                {
                    DataReader dataReader = DataReader.FromBuffer(ad.Data);
                    byte[] bytes = new byte[ad.Data.Length];


                    dataReader.ReadBytes(bytes);

                    if (bytes.Length > 0)
                    {

                        string data = System.Text.Encoding.UTF8.GetString(crcBytes, 0, crcBytes.Length);

                        Debug.WriteLine("ANDROID DEVICE FOUND " + data);
                    }

                }

            }

dataBuilder.addServiceData(new ParcelUuid(bluetoothUuid), advertiseData.getBytes