Just wanted to say, I just skipped all non-printables using an int array and it works just as it's supposed to.

Might be getting annoying by the time, saying it in every post, but thanks again. Nice board you got here, I -as a very beginner- learned a lot of useful stuff by just reading some threads. -which also saved you e.g. another "void main <--> int main ?" thread- :mrgreen:

You could use stdio.h and
for(int i=0;i<253;i++)
{
printf("%c", i);
}