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

// Inisialisasi LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Konfigurasi Pin
const int redLedPin = 32;
const int yellowLedPin = 33;
const int greenLedPin = 25;
const int soilMoisturePin = 34; // Pin analog untuk sensor kelembaban tanah
const int phSensorPin = A0; // Gunakan pin A0 untuk potensiometer sebagai sensor pH

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

  // Inisialisasi pin LED
  pinMode(redLedPin, OUTPUT);
  pinMode(yellowLedPin, OUTPUT);
  pinMode(greenLedPin, OUTPUT);

  // Inisialisasi pin sensor pH
  pinMode(phSensorPin, INPUT);
  pinMode(soilMoisturePin, INPUT); // Inisialisasi pin sensor kelembaban
}

void loop() {
  // Baca nilai dari sensor kelembaban tanah
  int16_t sensorValue = analogRead(soilMoisturePin);
  float humidityPercent = map(sensorValue, 0, 4095, 0, 100); // Rentang 0-4095

  // Baca nilai dari potensiometer (sensor pH simulasi)
  int phValue = analogRead(phSensorPin);
  float pH = map(phValue, 0, 1023, 1, 14);  // Peta nilai potensiometer ke skala pH 1-14

  String msg;

  // Logika penentuan kelembaban tanah
  if (humidityPercent < 40) {
    msg = "BASAH";
    digitalWrite(redLedPin, HIGH);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(greenLedPin, LOW);
  } else if (humidityPercent > 60) {
    msg = "KERING";
    digitalWrite(redLedPin, LOW);
    digitalWrite(yellowLedPin, LOW);
    digitalWrite(greenLedPin, HIGH);
  } else {
    msg = "BAIK";
    digitalWrite(redLedPin, LOW);
    digitalWrite(yellowLedPin, HIGH);
    digitalWrite(greenLedPin, LOW);
  }

  // Tampilkan pada LCD
  lcd.clear();
  lcd.print("Kelembapan Tanah ");
  lcd.print(msg);
  lcd.setCursor(0, 1); // Pindah ke baris kedua
  lcd.print("pH: ");
  lcd.print(pH);
  lcd.print("  Humidity: ");
  lcd.print(humidityPercent);
  lcd.print("%");
  
  delay(1000);
}