void Start()
    {
        Application.runInBackground = true;
        _scannedItems = new Dictionary<string, BleDeviceInfo>();

        BluetoothLEHardwareInterface.Initialize(true, false, () =>
        {
        },
        (error) =>
        {
            BluetoothLEHardwareInterface.Log("Error: " + error);
            if (error.Contains("Bluetooth LE Not Enabled"))
                BluetoothLEHardwareInterface.BluetoothEnable(true);
        });
        Debug.Log("CheckForBluetooth()");
        InvokeRepeating("CheckForBluetooth", 1f, 1f);
    }

 void CheckForBluetooth()
    {
        Debug.Log("BluetoothLEHardwareInterface.StopScan()");
        BluetoothLEHardwareInterface.StopScan();

        Debug.Log("ScanForPeripheralsWithServices.ScanForPeripheralsWithServices()");
        BluetoothLEHardwareInterface.ScanForPeripheralsWithServices(null, null, (address, name, rssi, bytes) =>
        {
            BluetoothLEHardwareInterface.Log("item found !");
            BluetoothLEHardwareInterface.Log("item scanned: " + address);
            BluetoothLEHardwareInterface.Log("item rssi: " + rssi);
        }, false);
    }