#define DHT_PIN 12
#define LED_LOW 7  //yellow
#define LED_HIGH 6 // orange

void setup() {
  Serial.begin(115200);
  pinMode(LED_LOW,OUTPUT);
  pinMode(LED_HIGH,OUTPUT);
  
  // put your setup code here, to run once:

}

void loop() {
  pinMode(DHT_PIN,OUTPUT);
  digitalWrite(DHT_PIN,LOW);
  delay(18);
  digitalWrite(DHT_PIN, HIGH);
  delayMicroseconds(40);

  pinMode(DHT_PIN, INPUT);

  while(digitalRead(DHT_PIN) == HIGH);
  while(digitalRead(DHT_PIN) == LOW);
  while(digitalRead(DHT_PIN) == HIGH);

  int i = 0;

  do{
    unsigned long int tOut = 0;
    unsigned long int t = micros();
    while(digitalRead(DHT_PIN) == LOW); // wait 50 us

    while(digitalRead(DHT_PIN) == HIGH)
    {
      tOut = micros() - t;
    }

    if(tOut > 50)
    {
      output_toggle(LED_HIGH);
      //this is a 1
    }
    else
    {
      output_toggle(LED_LOW);
      //this a 0
    }

    i++;
  }while(i != 40);

  Serial.println("ok");
  delay(1000);
  // put your main code here, to run repeatedly:

}

void output_toggle(int pin)
{
  int status = digitalRead(pin);
  digitalWrite(pin,!status);
}