#include <Servo.h>

Servo myservo;  

int pos = 90;    

const int trigPin = 9;
const int echoPin = 10;

const int trigPin2 = 5;
const int echoPin2 = 6;

const int relayPin = 11;

#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration, duration2;
float distanceCm, distanceCm2;
float distanceInch, distanceInch2;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
  pinMode(trigPin2, OUTPUT); 
  pinMode(echoPin2, INPUT); 
  pinMode(relayPin, OUTPUT);
  myservo.attach(3); 
  myservo.write(pos); 
}

void loop() {
  // Mengukur jarak di Tangki 1
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distanceCm = duration * SOUND_SPEED/2;

  // Mengukur jarak di Tangki 2
  digitalWrite(trigPin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2, LOW);
  duration2 = pulseIn(echoPin2, HIGH);
  distanceCm2 = duration2 * SOUND_SPEED/2;

  // Menampilkan jarak pada Serial Monitor
  Serial.print("Tingkat Air Tangki 1 (cm): ");
  Serial.println(distanceCm);
  Serial.print("Tingkat Air Tangki 2 (cm): ");
  Serial.println(distanceCm2);



    // Mengendalikan Servo
  if(distanceCm < 8) {
    myservo.write(180);
    delay(15);
  } else {
    myservo.write(90);
    delay(15);
  }


  // Mengendalikan Relay
  if(distanceCm2 < 8) {
    digitalWrite(relayPin, HIGH); // Turn on relay if distance is more than 50 cm
  } else {
    digitalWrite(relayPin, LOW); // Turn off relay otherwise
  }
  delay(1000);
}