please help:
PostgreSQL + edited server.properties
#Mostly required for local servers setup in case user want to log raw data in CSV format. See [raw data]
enable.raw.data.store=true
#enable DB
enable.db=true
#enable raw data storage to DB
enable.raw.db.data.store=true
I get gzip compressed 
Can I get to the non-compressed history ???
I need history data for web charts graphs … any help ?
Sure… It’s called GOOGLE 
Just unzip the file using one of many available programs, as shown in that link.
no I need not manual, but in HTML, JS, AJAX, Jquery …
how can I get history data, want to make some web-charts based on history … nice if in json, … or uncompressed csv
can someone help ?
You have already been helped in a few different ways…
Blynk has incorporated postgresql for Local Server DB, but if you want to learn how to export your data in various ways that are different than what is already incorporated in Blynk… then I suggest you follow @Costas recommendation and checkout: https://www.postgresql.org/docs/ as well as their community support.
so I can’t use Blynk API to get uncompressed data (history) ? so I must build a Local RESTful API server ?