SetupBluetoothAdvertisement.cs

BluetoothLEAdvertisementPublisher _publisher;

void SetupBluetoothAdvertisement()
{
    _publisher = new BluetoothLEAdvertisementPublisher();
    var manufacturerData = new BluetoothLEManufacturerData();
    manufacturerData.CompanyId = 0xFFFE;

    var myIpAddress = GetMyIPAddress();

    var writer = new DataWriter();
    writer.WriteString(myIpAddress);
    manufacturerData.Data = writer.DetachBuffer();

    _publisher.Advertisement.ManufacturerData.Add(manufacturerData);
    _publisher.Start();
}