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

LiquidCrystal_I2C lcd(0x27, 16, 2);
const int potPin = A0;
const int ledPin1 = 13;
const int ledPin2 = 12;
const int ledPin3 = 11;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
}

void loop() {
  int sensorValue = analogRead(potPin);
  float temperature = map(sensorValue, 0, 1023, 0, 100);

  lcd.setCursor(1, 0);
  lcd.print("Suhu : ");
  lcd.print(temperature);
  lcd.print("C  ");

  // Mengatur LED berdasarkan nilai suhu
  if (temperature < 20) {
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
  } else if (temperature >= 20 && temperature < 40) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, LOW);
  } else if (temperature >= 40 && temperature < 60) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, LOW);
  } else if (temperature >= 60 && temperature < 80) {
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
  } else {
    // Jika suhu di atas 80 (opsional), LED nyala semua
    digitalWrite(ledPin1, HIGH);
    digitalWrite(ledPin2, HIGH);
    digitalWrite(ledPin3, HIGH);
  }

  delay(100);
}