#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>


Servo myServo;
const int trigPin1 = 2; //Pin Trig sensor ultrasonik untuk palang
const int echoPin1 = 3; //Pin echo sensor ultrasonik untuk palang
const int servoPin = 9; //untuk servo

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C LCD: 0x27, 16 kolom, 2 baris
const int trigPin2 = 7;  // Pin Trig sensor ultrasonik slot parkir pertama
const int echoPin2 = 6;  // Pin Echo sensor ultrasonik slot parkir pertama
const int trigPin3 = 12;  // Pin Trig sensor ultrasonik slot parkir kedua
const int echoPin3 = 11;  // Pin Echo sensor ultrasonik slot parkir kedua

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);  // Inisialisasi LCD
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);
  pinMode(trigPin2, OUTPUT);
  pinMode(echoPin2, INPUT);
  pinMode(trigPin3, OUTPUT);
  pinMode(echoPin3, INPUT);
  myServo.attach(servoPin);
  lcd.print("Slot 1: ");
  lcd.setCursor(0, 1);
  lcd.print("Slot 2: ");
}

void loop() {
  long duration, distance;
  int distance1 = getDistance(trigPin2, echoPin2);
  int distance2 = getDistance(trigPin3, echoPin3);

  updateLCDStatus(1, distance1);
  updateLCDStatus(2, distance2);

  delay(1000);  // Delay 1 detik antar pembacaan
  
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);

  duration = pulseIn(echoPin1, HIGH);
  distance = (duration / 2) / 29.1;

   if (distance < 10) { // Adjust this threshold based on your setup
    openGate();
    delay(5000); // Keep the gate open for 5 seconds (adjust as needed)
    closeGate();
  }
}

int getDistance(int trigPin, int echoPin) {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  return pulseIn(echoPin, HIGH) * 0.034 / 2;  // Menghitung jarak dalam cm
}

void openGate() {
  myServo.write(90); // Adjust the angle for your servo
}

void closeGate() {
  myServo.write(0); // Adjust the angle for your servo
}

void updateLCDStatus(int slot, int distance) {
  lcd.setCursor(6, slot - 1);
  if (distance < 10) {
    lcd.print("Full   ");
  } else {
    lcd.print("Empty  ");
  }
}