#include <Wire.h>
#include <LiquidCrystal_I2C.h>
const int moisturePin = A0;
const int pHPin = A1;
const int relayPin = 7;
const int ledOn = 8;
const int ledOff = 9;
const int buzzerPin = 10;
const int moistureThreshold = 400;
const float pHThreshold = 6.5;
LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  pinMode(relayPin, OUTPUT);
  pinMode(ledOn, OUTPUT);
  pinMode(ledOff, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  digitalWrite(relayPin, LOW);
  digitalWrite(buzzerPin, LOW);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Smart Garden");
  lcd.setCursor(0, 1);
  lcd.print("System Starting");
  delay(2000);
}
void loop() {
  int moistureLevel = analogRead(moisturePin);
  float pHLevel = analogRead(pHPin) * (14.0 / 1023.0);
  Serial.print("Moisture Level: ");
  Serial.println(moistureLevel);
  Serial.print("pH Level: ");
  Serial.println(pHLevel);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Moisture: ");
  lcd.print(moistureLevel);
  lcd.setCursor(0, 1);
  lcd.print("pH: ");
  lcd.print(pHLevel);
  if (moistureLevel < moistureThreshold || pHLevel < pHThreshold) {
    digitalWrite(relayPin, HIGH);
    digitalWrite(ledOn, HIGH);
    digitalWrite(ledOff, LOW);
    digitalWrite(buzzerPin, HIGH);
    Serial.println("Watering...");
    lcd.setCursor(0, 1);
    lcd.print("Watering...");
  } else {
    digitalWrite(relayPin, LOW);
    digitalWrite(ledOn, LOW);
    digitalWrite(ledOff, HIGH);
    digitalWrite(buzzerPin, LOW);
    Serial.println("No watering needed.");
    lcd.setCursor(0, 1);
    lcd.print("No watering");
  }
  delay(2000);
}