hi, it seems that I have problems with RAM shortage. Therefore I searched in the forum for suitable postings how to measure free RAM. I found some but they do not work. I guess that they need some header files which I don't know.
One posting suggested
The compiler reports that freeRAM() was not declared in this scope.
Another posting suggested
(int) &v - (brkval == 0 ? (int) &heap_start : (int) __brkval)
The compiler reports that v, __brkval and __heap_start are not declared.
What header files or libraries have to be included in order to use these examples? What else methods can be used?