       case 'd':
       // Stopping
       Serial.println("Stop");
-      drive(0,0,0);
+      drive_stop();
       break;
     }
   }

#include <ZumoMotors.h>

#define LED_PIN 13



String inputString = "";         // a string to hold incoming data
boolean stringComplete = false;  // whether the string is complete
Timer t;

void setup()
{
