Sonoff TH16 - How plot temp / humidity or downl9ad data?

Hi,
I have acquired Sonoff TH16 to control temperature in my home from remote. I have installed Ewelink app on my smartphone and I can see temperature and humidity; with Smart Things app I can see a graph… but I can’t download data like *.xls, *.csv, etc.

Is there a way to download data or save in Google Drive or plot in Google Sheet? I have read that someone flash Sonoff TH16 with Tasmota firmware, but I don’t know if I can plot data.

Thank you
and
Merry Christmas

BP