Anyway to tell how much SRAM my sketch is using?

Projects Programming
1

Short of adding up all the bits and bytes by hand....

Is there some system variable or something that I can send out the serial port? An equivalent to the "free" *nix command?

The wiki is not much help... It basically says that if it's not failing in strange ways it should be OK.

2

Google Arduino free memory.

3

try this

int freeRam () {
  extern int __heap_start, *__brkval; 
  int v; 
  return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 
}