AntiGuide: ArduinoFreeMemory

// ""FreeMemory .""

#include <MemoryFree.h>

// ethernet interface mac address, must be unique on the LAN
 void setup () {
  Serial.begin(9600);
  Serial.println("\n[RAM free]");
   Serial.print("free=");
  Serial.println(freeMemory());
 }
 
void loop () {
 }