Sketch - Firmware Lampada capacitativa

/*
 *Program: Capacitive Lamp firmware.
 *Author: Lorenzo Benevento
 *First, Last data modified: 28-05-2014
 *Description: Software utilizzato per controllare tramite tocco una lampada. In supporto
 *             abbiamo la scheda "capacitiveLamp" progettata da Lorenzo Benevento e la libreria
 *             "capacitiveSensor.h" di Paul Badger.
 *ArduinoVersion: Arduino *
 *TestedArduinoVersion: Arduino Uno R3
 */
#include <CapacitiveSensor.h>
CapacitiveSensor capSensor(2, 4);

int coilPin = 3;
int emitterPin = 2;
int receiverPin = 4;

int sensorValue;
int switchState;
int prevSwitchState = 0;
int coilState;

void setup(){
  pinMode(coilPin, OUTPUT);
}

void loop(){
  sensorValue = capSensor.capacitiveSensor(30);

  if(sensorValue > 1){
    switchState = HIGH;
  }
  else{
    switchState = LOW;
  }

  if(switchState == HIGH){
    if(coilState == LOW){
      coilState = HIGH;
    }
    else{
      coilState = LOW;
    }
    digitalWrite(coilPin, coilState);
    delay(500);
  }
}