const int PIN_LED_MERAH  = 23;
const int PIN_LED_KUNING = 19;
const int PIN_LED_HIJAU  = 18;

const int trigPin = 14;
const int echoPin = 12;

//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;
float distanceInch;
float Suhu = 75.5;
void GetJarak(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  
  // Convert to inches
  distanceInch = distanceCm * CM_TO_INCH;
}
void PrintJarak(){
 // Prints the distance in the Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.println(distanceInch);
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  pinMode(PIN_LED_MERAH,OUTPUT);
  pinMode(PIN_LED_KUNING, OUTPUT);
  pinMode(PIN_LED_HIJAU, OUTPUT);
    digitalWrite(PIN_LED_MERAH, HIGH);
    digitalWrite(PIN_LED_KUNING, HIGH);
    digitalWrite(PIN_LED_HIJAU, HIGH);
}
void loop() {
  GetJarak();
  PrintJarak();
  if ((distanceCm >90) && (Suhu >=75))
  {
    digitalWrite(PIN_LED_MERAH, LOW);
    digitalWrite(PIN_LED_KUNING, LOW);
    digitalWrite(PIN_LED_HIJAU, HIGH);
    
  }
  else if((distanceCm < 50) && ( Suhu <30.0)){
     digitalWrite(PIN_LED_MERAH, HIGH);
    digitalWrite(PIN_LED_KUNING, HIGH);
    digitalWrite(PIN_LED_HIJAU, LOW);
  }
  else{
     digitalWrite(PIN_LED_MERAH, HIGH);
    digitalWrite(PIN_LED_KUNING, HIGH);
    digitalWrite(PIN_LED_HIJAU, HIGH);
  }
  delay(2000);
}