await MySensorCoreHelper.CallSensorcoreApiAsync(async () =>
{
    if (await ActivityMonitor.IsSupportedAsync())
    {
        _activityMonitor = await ActivityMonitor.GetDefaultAsync();

        _activityMonitor.ReadingChanged+= (source, value) => Debug.WriteLine("Hier : {0} , heure : {1}", value.Mode, value.Timestamp);
    }

});