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

// Initialize the LCD with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// Define the DHT sensor and its pin
#define DHTPIN 7     // Pin which is connected to the DHT sensor
#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600); // Start serial communication at 9600 baud
  lcd.begin(16, 2);   // Initialize the LCD
  lcd.clear();
  
  pinMode(6, OUTPUT); // Set pin 6 as an output for the water pump
  digitalWrite(2, HIGH);
  
  delay(1000);        // Wait for a second
  
  // Initialize DHT sensor
  dht.begin();
  
  // Initial message on LCD
  lcd.setCursor(0, 0);
  lcd.print("IRRIGATION");
  lcd.setCursor(0, 1);
  lcd.print("SYSTEM IS ON ");
  
  // Print initial message to Serial Monitor
  Serial.println("IRRIGATION SYSTEM IS ON");
  
  delay(3000);
  lcd.clear();
}

void loop() {
  int value = analogRead(A0); // Read the analog value from the water sensor
  Serial.print("Water sensor value: "); // Print the value to the Serial Monitor
  Serial.println(value);
  
  lcd.setCursor(0, 0);

  // Update water pump status based on water sensor value
  if (value < 300) { // Adjust the threshold value according to your sensor readings
    digitalWrite(6, HIGH);   // Turn the pump on
    lcd.print("Water Pump is ON ");
    Serial.println("Water Pump is ON");
  } else {
    digitalWrite(6, LOW);  // Turn the pump off
    lcd.print("Water Pump is OFF");
    Serial.println("Water Pump is OFF");
  }

  // Update water level status on the LCD and Serial Monitor
  lcd.setCursor(0, 1);
  if (value < 300) {
    lcd.print("Water Level: LOW ");
    Serial.println("Water Level: LOW");
  } else if (value >= 300 && value < 700) { // Mid-level range
    lcd.print("Water Level: MID ");
    Serial.println("Water Level: MID");
  } else {
    lcd.print("Water Level: HIGH");
    Serial.println("Water Level: HIGH");
  }

  delay(2500); // Display the water pump and level status for 3 seconds

  // Read temperature and humidity
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Print temperature and humidity to Serial Monitor
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *C ");

  // Display temperature and humidity on the LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print(" %");

  delay(3000); // Display the temperature and humidity for 3 seconds
}