Ok, here's my current progress.

I've been trying to understand the data-invertal for data1m. I thought there might be a constant interval the entries are created for. But so far I can't find the scheme comparing the timestamps (which are the long numbers on position #1 in first data-entry).

I really hope someone knows more about that and can explain me how to compute it myself or at least which intervals the data is based on if it may be such simple and there is no more compution for some kind of data calculations between 1m and 1h and so on.