Timeseries chart not working

I need help in using timeseries chart. I am using data bucket as source of data for timeseries chart widget. But the chart does not display at all. I have made sure the data exist for selected timeframe of “last 6 hours”. Also tried to set it to last 3 months, but it does not work for any relative timeframe.

The bucket data columns is in format as
timestamp - 2021-07-05T09:12:06.132113
temperature - 23.4

Can anyone help how to make the timeseries work?

I think I figured out the issue.
I was expecting that both the temperature & timestamp fields need to be specified in widget settings. However, only need to specify the temperature column & it takes the timestamp (I believe from the “Date” field)
It works now.