#include <Servo.h>
#include <DHT.h>
#include <LiquidCrystal.h>

#define DHTPIN 6
#define DHTTYPE DHT22
#define SOIL_MOISTURE_PIN A0
#define SERVO_PIN 9
#define LED_PIN 7
#define BUTTON_PIN 8

DHT dht(DHTPIN, DHTTYPE);
Servo servo;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

bool irrigationStatus = false;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  servo.attach(SERVO_PIN);
  servo.write(0); // Valve closed
  
  lcd.begin(16, 2);
  dht.begin();
}

void loop() {
  int soilMoistureValue = analogRead(SOIL_MOISTURE_PIN);
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: "); lcd.print(t); lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Hum: "); lcd.print(h); lcd.print("%");

  if (digitalRead(BUTTON_PIN) == LOW) {
    irrigationStatus = !irrigationStatus;
    delay(500); // Debounce delay
  }

  if ((soilMoistureValue > 500 && t > 25) || irrigationStatus) { // Adjust the threshold as per your requirement
    startIrrigation();
  } else {
    stopIrrigation();
  }

  delay(2000); // Adjust delay as per requirement
}

void startIrrigation() {
  digitalWrite(LED_PIN, HIGH);
  servo.write(90); // Open valve
  lcd.setCursor(0, 1);
  lcd.print("Irrigation ON ");
}

void stopIrrigation() {
  digitalWrite(LED_PIN, LOW);
  servo.write(0); // Close valve
  lcd.setCursor(0, 1);
  lcd.print("Irrigation OFF");
}