Hello pert
Thanks a lot for the answer.
I will look into the dynamic memory allocation part.
Concerning the watchdog. As far as i understand it will only help me in case the sketch hangs in general. Because i can only see the hanging point from disassembling the compiled sketch on my harddrive.
My sketch runs for like 3-4 hours without problems. Then it hangs for no reason.
Do you think the dynamic memory allocation is the most probable cause then?
Thanks again