   }
   
   analogWrite(SPL_PIN, 3);
-  analogWrite(EXT_PIN, 0);
+  analogWrite(EXT_PIN, 40);
   delay(10);
 
   printSerialData();

  digitalWrite(EXT_PIN, LOW);
  digitalWrite(SPL_PIN, LOW);
  digitalWrite(HTR_PIN, LOW);

  Serial.begin(9600);
  start_millis = millis();

// Set up global variables
const byte EXT_PIN = 11;
const byte SPL_PIN = 10;
const byte HTR_PIN = 9;
const byte ENBL_PIN = 4;
const byte HTR_LED = 7;
const byte HOT_LED = 6;

// Serial input parameter editing for PID
boolean input_complete = false;
