CI3 Ajax and Sessions expiration

Thank you very much for your responses. I might think about using POST instead of GET. It isn't that bay since I have to pass some values such as userID. I will have to set up CSRF though.
I'll try it out and tell you how it went. For not it works when I made the sess_time_to_update larger. Is it a problem having it large number such as day?

Thank you.