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

#define SOIL_PIN A0
#define BUZZER_PIN 8
#define SERVO_PIN 9
#define DRY_THRESHOLD 600

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo valve;

void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
  valve.attach(SERVO_PIN);

  lcd.init();
  lcd.backlight();
  lcd.print("Plant Guardian");
  delay(1500);
  lcd.clear();
}

void loop() {
  int moisture = analogRead(SOIL_PIN);

  lcd.setCursor(0, 0);
  lcd.print("Level: ");
  lcd.print(moisture);
  lcd.print("   ");

  lcd.setCursor(0, 1);
  if (moisture > DRY_THRESHOLD) {
    lcd.print("Status: DRY!");
    tone(BUZZER_PIN, 1000);
    valve.write(90);
  } else {
    lcd.print("Status: OK ");
    noTone(BUZZER_PIN);
    valve.write(0);
  }

  delay(500);
}