#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

const int redLedPin = 32;   // Pin untuk LED merah
const int yellowLedPin = 33; // Pin untuk LED kuning
const int greenLedPin = 25; // Pin untuk LED hijau
const int buzzerPin = 26;   // Pin untuk buzzer

void setup()
{
  Wire.begin(23, 22);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

  pinMode(redLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop()
{
  int16_t sensorValue = analogRead(34);
  float humidityPercent = map(sensorValue, 2165, 3135, 0, 100); // Konversi nilai analog ke persentase
  String msg;

  if (humidityPercent < 40) {
    msg = "BASAH";
    digitalWrite(redLedPin, HIGH); // LED merah nyala
    digitalWrite(yellowLedPin, LOW); // LED kuning mati
    digitalWrite(greenLedPin, LOW); // LED hijau mati
    tone(buzzerPin, 1000); // Bunyi buzzer
  } else if (humidityPercent > 60) {
    msg = "KERING";
    digitalWrite(redLedPin, LOW); // LED merah mati
    digitalWrite(yellowLedPin, LOW); // LED kuning mati
    digitalWrite(greenLedPin, HIGH); // LED hijau nyala
    tone(buzzerPin, 2000); // Bunyi buzzer
  } else {
    msg = "BAIK";
    digitalWrite(redLedPin, LOW); // LED merah mati
    digitalWrite(yellowLedPin, HIGH); // LED kuning nyala
    digitalWrite(greenLedPin, LOW); // LED hijau mati
    noTone(buzzerPin); // Matikan bunyi buzzer
  }

  lcd.clear();
  lcd.print("Kelembapan Tanah ");
  lcd.print(msg);
  lcd.setCursor(0, 1); // Pindah ke baris kedua
  lcd.print("Presentasi: ");
  lcd.print(humidityPercent);
  lcd.print("%");
  delay(500); 
}