Soplando la vela arduino

//EL CODIGO NO ESTA COMENTADO Y NO ESTA TABULADO, sorry
#define DHT11_PIN 0      // ADC0
  int coso=0;
int arranca(int num)
{
  if (num==1) {
//Reiniciando la lectura de sensor dth
  DDRC |= _BV(DHT11_PIN);
  PORTC |= _BV(DHT11_PIN);
  }
}

byte read_dht11_dat()
{
  byte i = 0;
  byte result=0;
  for(i=0; i< 8; i++)
  {
    while(!(PINC & _BV(DHT11_PIN)));  // wait for 50us
    delayMicroseconds(30);

    if(PINC & _BV(DHT11_PIN))
      result |=(1<<(7-i));
    while((PINC & _BV(DHT11_PIN)));  // wait '1' finish
  }
  return result;
}

  int relay=10;
void setup() {

  pinMode(relay,OUTPUT);
  DDRC |= _BV(DHT11_PIN);
  PORTC |= _BV(DHT11_PIN);

  Serial.begin(9600);
  Serial.println("Ready");
}

void loop()
{

  byte dht11_dat[5];
  byte dht11_in;
  byte i;
  int relay=10;
  // start condition
  // 1. pull-down i/o pin from 18ms
  PORTC &= ~_BV(DHT11_PIN);
  delay(18);
  PORTC |= _BV(DHT11_PIN);
  delayMicroseconds(40);

  DDRC &= ~_BV(DHT11_PIN);
  delayMicroseconds(40);

  dht11_in = PINC & _BV(DHT11_PIN);

  if(dht11_in)
  {
    int coso=coso+1;
    digitalWrite(relay, LOW);
    delay(500);
    digitalWrite(relay, HIGH);
    delay(500);
    Serial.println("El sensor no esta conectado...");

    arranca(coso);
    return;
  }
  delayMicroseconds(80);

  dht11_in = PINC & _BV(DHT11_PIN);

  if(!dht11_in)
  { int coso=coso+1;
    digitalWrite(relay, LOW);
    delay(500);
    digitalWrite(relay, HIGH);
    delay(500);
    Serial.println("dht11 start condition 2 not met");
    arranca(coso);
    return;


  }
  delayMicroseconds(80);
  // now ready for data reception
  for (i=0; i<5; i++)
    dht11_dat[i] = read_dht11_dat();

  DDRC |= _BV(DHT11_PIN);
  PORTC |= _BV(DHT11_PIN);

  byte dht11_check_sum = dht11_dat[0]+dht11_dat[1]+dht11_dat[2]+dht11_dat[3];
  // check check_sum
  if(dht11_dat[4]!= dht11_check_sum)
  {
    Serial.println("DHT11 checksum error");
  }

  Serial.print("Humedad = ");
  Serial.print(dht11_dat[0], DEC);
  Serial.print(".");
  Serial.print(dht11_dat[1], DEC);
  Serial.print("%  ");
  Serial.print("Temperatura = ");
  Serial.print(dht11_dat[2], DEC);
  Serial.print(".");
  Serial.print(dht11_dat[3], DEC);
  Serial.println("C  ");

  delay(1000);
  if (dht11_dat[0]<=60) {
   digitalWrite(relay, LOW);
 } else {
   digitalWrite(relay, HIGH);
 }
}