#include<LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);
#define pb1 13
#define pb2 12
#define pb3 11
#define pb4 10
#define led 2
#define buzzerPin 3
#define led2 4
#define   potensio  A0
int hasilvr;
char tampil[33];
bool s1,s2,s3,s4=0;
int menu =0;
int hitung;
void setup() {
  // put your setup code here, to run once:
lcd.begin(20,4);
lcd.backlight();
Serial.begin(9600);
pinMode(led,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(buzzerPin, OUTPUT);
pinMode(potensio, INPUT);
pinMode(pb1, INPUT_PULLUP);
pinMode(pb2, INPUT_PULLUP);
pinMode(pb3, INPUT_PULLUP);
pinMode(pb4, INPUT_PULLUP);
lcd.setCursor(4,0);
lcd.print("DAFTAR  MENU");
lcd.setCursor(2,2);
lcd.print("  NAMA    HITUNG");
lcd.setCursor(2,3);
lcd.print("  VR      ALARM");
}

void loop() {
  Serial.println(menu);
  // put your main code here, to run repeatedly:
if(digitalRead(pb1)==0){
 
    menu++;
s1=1;
if(menu>4)menu=1;
s1=0;
while(digitalRead(pb1)==0){}
}

 else if(digitalRead(pb2)==0) {
  delay(300);
  s2=1;
  menu--;
  if(menu<1)menu=4;
  s2=0;
 }

 
else if(digitalRead(pb3)==0&& menu==1){
delay(300);
lcd.clear();
s3=1;
menu=5;
s3=0;
}

else if(digitalRead(pb3)==0 && menu==2){
  delay(300);
 lcd.clear();
 s3=1;
menu=6;
s3=0;
}
else if(digitalRead(pb3)==0 && menu==3){
  delay(300);
  lcd.clear();
  s3=1;
  menu=7;
  s3=0;
}
else if (digitalRead(pb3)==0 && menu==4){
  delay(300);
  lcd.clear();
  s3=1;
  menu=8;
  s3=0;
}
else if(digitalRead(pb4)==0 && menu==5) {
  delay(300);
  lcd.clear();
  s4=1;
  menu=1;
   Serial.println(s4);
  s4=0;
 }
else if(digitalRead(pb4)==0 && menu==6){
  delay(300);
  lcd.clear();
  s4=1;
  menu=2;
  s4=0;
}
else if(digitalRead(pb4)==0 && menu==7){
  delay(300);
  lcd.clear();
  s4=1;
  menu=3;
  s4=0;
}
else if(digitalRead(pb4)==0 && menu==8){
  delay(300);
    noTone(buzzerPin); 
  digitalWrite(led, LOW);
  digitalWrite(led2, LOW);
  lcd.clear();
  s4=1;
  menu=4;
  s4=0;
}

if(menu==1){
  lcd.setCursor(4,0);
  lcd.print("DAFTAR  MENU");
  lcd.setCursor(2,2);
  lcd.print("> NAMA    HITUNG");
  lcd.setCursor(2,3);
  lcd.print("  VR      ALARM");
  }

else if(menu==2){
  lcd.setCursor(4,0);
  lcd.print("DAFTAR  MENU");
  lcd.setCursor(2,2);
  lcd.print("  NAMA    HITUNG");
  lcd.setCursor(2,3);
  lcd.print("> VR      ALARM");
  }
else if(menu==3){
  lcd.setCursor(4,0);
  lcd.print("DAFTAR  MENU");
  lcd.setCursor(2,2);
  lcd.print("  NAMA  > HITUNG");
  lcd.setCursor(2,3);
  lcd.print("  VR      ALARM");
  }
 else if(menu==4){
  lcd.setCursor(4,0);
  lcd.print("DAFTAR  MENU");
    lcd.setCursor(2,2);
    lcd.print("  NAMA    HITUNG");
    lcd.setCursor(2,3);
    lcd.print("  VR    > ALARM");
    }
  
else if(menu==5){
  lcd.setCursor(7,1);
  lcd.print("MIJUN");
  lcd.setCursor(6,2);
  lcd.print("UZUMAKI");
}
 else if(menu==6){
  hasilvr=analogRead(potensio);
  lcd.setCursor(2,1);
  lcd.print("NILAI SENSOR VR");
  lcd.setCursor(7,2);
  sprintf(tampil,"%4d",hasilvr);
  lcd.print(tampil);
  delay(100);
 }
 else if(menu==7){
  hitung++;
  if(hitung<=15){
  lcd.setCursor(0,2);
  sprintf(tampil,"MARI BERHITUNG : %2d",hitung);
  lcd.print(tampil);
  delay(300);
  }
  if(hitung>15){
    hitung=0;
  }
 
 }
 else if(menu==8){
  lcd.setCursor(7,1);
  lcd.print("ALARM");
  lcd.setCursor(5,2);
  lcd.print("BAHAYA!!!!!!");
  tone(buzzerPin, 660); 
  digitalWrite(led, HIGH);
  digitalWrite(led2, LOW);// Menghasilkan bunyi frekuensi 1000 Hz pada buzzer
      delay(150);
      lcd.noBacklight(); 
      lcd.clear();// Tunda selama 1 detik
        noTone(buzzerPin);
         digitalWrite(led, LOW);
  digitalWrite(led2, HIGH); // Matikan bunyi buzzer
          delay(50);
          lcd.backlight();
           lcd.setCursor(7,1);
  lcd.print("ALARM");
  lcd.setCursor(5,2);
  lcd.print("BAHAYA!!!!!!");
           // Tunda selama 1 detik sebelum memulai bunyi kembali
            digitalWrite(led, LOW);
  digitalWrite(led2, HIGH);
           tone(buzzerPin, 500);
           delay(150);

 }
  }