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

#define pinBuzzer 7
#define pinServo 9
#define pinPot A0

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

int val;

//karakter derajat pada LCD
byte derajat[] = {
  B00110,
  B01001,
  B01001,
  B00110,
  B00000,
  B00000,
  B00000,
  B00000
};

void setup() {
  pinMode(pinBuzzer, OUTPUT);
  Serial.begin(115200);

  myServo.attach(pinServo);

  lcd.init(); 
  lcd.backlight();
  lcd.createChar(0, derajat);
}

void suaraBeep() {
  tone(pinBuzzer, 120);
  delay(500);

  noTone(pinBuzzer);
  delay(1000);

  tone(pinBuzzer, 100, 500);  
}

void loop() {  
  val = analogRead(pinPot);
  Serial.println("Nilai Potensio: " + String(val));
  lcd.setCursor(0, 0);
  lcd.print("Potensio: " + String(val) + " ");

  val = map(val, 0, 1023, 0, 180);
  Serial.println("Nilai Derajat: " + String(val));
  lcd.setCursor(0, 1);
  lcd.print("Derajat: " + String(val) + " ");

  int lebar = String(val).length();
  if (lebar == 3) {
    lcd.setCursor(12, 1);
    lcd.write(0);
  } else if (lebar == 2) {
    lcd.setCursor(11, 1);
    lcd.write(0);
  }  else if (lebar == 1) {
    lcd.setCursor(10, 1);
    lcd.write(0);
  }

  if (val >= 90) {
    suaraBeep();
  } else {
    noTone(pinBuzzer);
  }

  myServo.write(val);
  delay(15);
}