#include <LiquidCrystal_I2C.h>
#include "DHT.h"

#define DHTPIN 2     
#define DHTTYPE DHT22
#define RELAY_1_PIN 6
#define RELAY_2_PIN 7

LiquidCrystal_I2C lcd(0x27,16,2);
DHT dht(DHTPIN, DHTTYPE);

void setup()
{
  dht.begin();
  pinMode(RELAY_1_PIN, OUTPUT);
  pinMode(RELAY_2_PIN, OUTPUT); 

  lcd.init();
  lcd.backlight();
  lcd.setCursor(4,0);
  lcd.print("Plantiva");
  delay(2000);
  lcd.clear();
}

void loop()
{
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  int16_t i = analogRead(A0);
  
  String soil;
  if (i < 300) {
    soil = "WET";
  } else if (i > 700) {
    soil = "DRY";
  } else {
    soil = "OK";
  }

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(soil);
  lcd.setCursor(4,0);
  lcd.print(int(temperature));
  lcd.print("*C");
  lcd.setCursor(10,0);
  lcd.print(int(humidity));
  lcd.print("%");

  if (soil == "DRY") {
    digitalWrite(RELAY_1_PIN, HIGH);
    lcd.setCursor(0,1);
    lcd.print("PUMP-ON ");
  } else {
    digitalWrite(RELAY_1_PIN, LOW);
    lcd.setCursor(0,1);
    lcd.print("PUMP-OFF");
  }

  if (temperature > 30) {
    digitalWrite(RELAY_2_PIN, HIGH);
    lcd.setCursor(10,1);
    lcd.print("FAN-ON  ");
  } else {
    digitalWrite(RELAY_2_PIN, LOW);
    lcd.setCursor(10,1);
    lcd.print("FAN-OFF ");
  }

  delay(500); 
}