Hello guys, i was wondering if user data(projects, accounts) is preserved when i update server(when i upload new jar)? If not what should i copy from jar file?
Just update the jar file. It’ll save all your settings and stuff
So i will simply replace old jar with new one via ftp, or?
Yep, thats the ticket. I usually make a symbolic link to the jar file so I can have a static startup script.
Do you think it should be more complex 
?
no, no, but I wasn’t sure about it.I thought that I will delete all data if I would replace it.
If you correctly specified dataFolder everything will be fine.
Good point. That’s why i was so curious about it 
Thank you very much. I just copyied /tmp/blynk contents to a new dataFolder and it works like a charm.