Hi liudr
Basic_AT.ino is a sketch that tests the AT capabilities of my setup. It works like a command line via the serial line, and I can use it to enter AT commands, as well as receive responses. This sketch is there just to illustrate roughly how the AT-side of my setup functions. I also mentioned that when I test my setup with this sketch, it behaves correctly.
Bluegum_Logger_2.ino is my main project and the source of all my problems.
File_maker_forum.ino is used to create all the files on the SD card Bluegum_Logger needs to work.
I will start to run a few memory tests, to see if that is my problem. I cannot do tests with the mega 2560. I only have access to Stalkers.
Thanks so far