public class DeviceLocationProperties 

{
    // Check if a device is connected
    bool isConnected = DeviceLocationService.Instance.IsDeviceConnected();
    if (!isConnected)
        return; // no device connected
                // Get the current device location source
    var src = DeviceLocationService.Instance.GetSource();
    // Check if the source is a SerialPortDeviceLocationSource
    //Set values for the SerialPortDeviceLocationSource
    if (src is SerialPortDeviceLocationSource serialPortSrc)
    {
        var port = serialPortSrc.ComPort;
        var antennaHeight = serialPortSrc.AntennaHeight;
        var dataBits = serialPortSrc.DataBits;
        var baudRate = serialPortSrc.BaudRate;
        var parity = serialPortSrc.Parity;
        var stopBits = serialPortSrc.StopBits;

        // retrieving spatial reference needs the MCT
        var sr = await QueuedTask.Run(() =>
        {
            return serialPortSrc.GetSpatialReference();
        });

    }
    //Get current device location properties being used.
    var dlProps = DeviceLocationService.Instance.GetProperties();
    var accuracy = dlProps.AccuracyThreshold;
}

{
    //Note: Run within QueuedTask
    // Get the current device location properties
    var dlProps = DeviceLocationService.Instance.GetProperties();
    //Change the accuracy threshold
    dlProps.AccuracyThreshold = 22.5; // meters
                                      // Update the properties on the device location source
    DeviceLocationService.Instance.UpdateProperties(dlProps);
}