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Arduino - Detecting...
 
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[Solved] Arduino - Detecting Free RAM / Free Memory

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 Hans
(@hans)
Famed Member Admin
Joined: 11 years ago
Posts: 2716
Topic starter  

While trying to debug a sketch, I had to test memory availability to see if I was dealing with memory leaks.

On GitHub I found this little procedure for that purpose:

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

You can dump the output to your Serial monitor like so:

serial.print( freeRam() );

   
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