#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>

const int pushButtonPin = 18;
const int ldrPin = 35;
const int buzzerPin = 26;
const int servoPin = 19;

LiquidCrystal_I2C lcd(0x27, 16, 2); 
Servo servo;

int lastButtonState = 0;
bool buttonState = false;

void setup() {
  pinMode(pushButtonPin, INPUT_PULLUP);
  pinMode(buzzerPin, OUTPUT);
  servo.attach(servoPin);
  lcd.init();
  lcd.backlight();
  lcd.print("Press button");
}


void loop() {
  bool currentButtonState = digitalRead(pushButtonPin);

  if (currentButtonState == LOW && lastButtonState == HIGH) {
    delay(50);
    buttonState = !buttonState;

    if (buttonState) {
      mainFunction();
    } else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("My 1st project");
    }
  }

  lastButtonState = currentButtonState;

  int ldrValue = analogRead(ldrPin);
  lcd.setCursor(0, 1);
  lcd.print("LDR Value: " + ldrValue);
}

void mainFunction() {
  tone(buzzerPin, 1000);
  delay(5);
  noTone(buzzerPin);

  for (int i = 0; i < 2; i++) {
    for (int pos = 0; pos <= 180; pos++) {
      servo.write(pos);
      delay(15);
    }
    for (int pos = 180; pos >= 0; pos--) {
      servo.write(pos);
      delay(15);
    }
  }
}