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

#define DHTPIN 2           
#define DHTTYPE DHT22      
#define LDR_PIN A0         
#define SOIL_MOISTURE_PIN A1 
#define RELAY_PIN 7        
#define LED_PIN 8         

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(9600);
  
  dht.begin();
  
  pinMode(LDR_PIN, INPUT);
  pinMode(SOIL_MOISTURE_PIN, INPUT);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.print("Smart Farming");
  delay(3000);  
  lcd.clear();
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  int ldrValue = analogRead(LDR_PIN);
  int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
  
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");
  
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");
  
  delay(3000); 
  
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);
  
  Serial.print("Soil Moisture: ");
  Serial.println(soilMoistureValue);
  
  int soilMoistureThreshold = 500;
  
  if (soilMoistureValue < soilMoistureThreshold) {
    digitalWrite(RELAY_PIN, HIGH);  
    digitalWrite(LED_PIN, HIGH);    
    lcd.setCursor(0, 1);
    lcd.print("Watering...     ");
  } else {
    digitalWrite(RELAY_PIN, LOW); 
    digitalWrite(LED_PIN, LOW); 
    lcd.setCursor(0, 1);
    lcd.print("Moisture Good  ");
  }
  
  delay(3000);
  lcd.clear();
}