writing on SD will not work

Hy all,

I have a problem with non working code.
Indeed I’m not albe to identify why it’s not working.
Maybe someone is able to give me support.

The code is complete working, only writing on SD-Card will not work (creating files is working proper).

I know, the coding is not the best (will be optimized as soon as all functions are running).

/* Sorry for coding comments in German */

Datalogger.txt (12.4 KB)