#include "LiquidCrystal_I2C.h"

LiquidCrystal_I2C lcd(0x27,16,2);  // set the LCD address

const int sensorPin = A0;  // Pin analog sensor kelembaban
const int relayPin = 7;    // Pin relay

int statusRelay = HIGH;  // Awalnya relay dalam keadaan ON

void setup() {
//Serial.begin(9600);
 lcd.init(); //initialize the lcd
 lcd.backlight(); //open the backlight  // 
 lcd.begin(16, 2);  // Inisialisasi LCD
  pinMode(sensorPin, INPUT);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, statusRelay);
  lcd.setCursor(3, 0);
  lcd.print("PPM_POLNAM");
  lcd.setCursor(4, 1);
  lcd.print("PNBP 2023");
  delay(5000);
  lcd.clear();


}

void loop() {
  // Baca nilai kelembaban
  int humidity = analogRead(sensorPin);

  // Petakan nilai humidity ke perosentase 
  int humidityPercentage = map(humidity, 0, 1023, 0, 100);

  // tampilkan humidity pada LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("H:"+ String(humidityPercentage) + "%");
  
  if (humidityPercentage >= 0 && humidityPercentage <= 30) {
    lcd.setCursor(0, 1);
    lcd.print("Kategori:Kering");
    lcd.setCursor(6, 0);
    lcd.print("|Pompa:ON");
    digitalWrite(relayPin, HIGH);
    statusRelay = HIGH;
  } else if (humidityPercentage > 30 && humidityPercentage <= 70) {
    lcd.setCursor(0, 1);
    lcd.print("Kategori:Lembab");
    lcd.setCursor(6, 0);
    lcd.print("|Pompa:OFF");
    digitalWrite(relayPin, LOW);
    statusRelay = LOW;
  } else {
    lcd.setCursor(0, 1);
    lcd.print("Kategori:Basah");
    lcd.setCursor(6, 0);
    lcd.print("|Pompa:OFF");
    digitalWrite(relayPin, LOW);
    statusRelay = LOW;
  }

  delay(1000);
}