#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 2          
#define DHTTYPE DHT22     
#define PIRPIN 3          
#define REDLED 4          
#define GREENLED 5        
#define RELAYPIN 6       
#define BUZZERPIN 7      

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Agricult. Sec Sys");
  delay(2000);  
  lcd.clear();
  dht.begin();
  pinMode(PIRPIN, INPUT);
  pinMode(REDLED, OUTPUT);
  pinMode(GREENLED, OUTPUT);
  pinMode(RELAYPIN, OUTPUT);
  pinMode(BUZZERPIN, OUTPUT);

  digitalWrite(REDLED, LOW);
  digitalWrite(GREENLED, HIGH); 
  digitalWrite(RELAYPIN, LOW);
  digitalWrite(BUZZERPIN, LOW);
}
void loop() {
  float temperature = dht.readTemperature();
  if (isnan(temperature)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C ");
  int motionDetected = digitalRead(PIRPIN);
  if (motionDetected == HIGH) {
    lcd.setCursor(0, 1);
    lcd.print("Motion Detected!  ");
    digitalWrite(REDLED, HIGH);
    digitalWrite(GREENLED, LOW);
    digitalWrite(RELAYPIN, HIGH);
    digitalWrite(BUZZERPIN, HIGH);
  } else {
    lcd.setCursor(0, 1);
    lcd.print("All Good          ");
    digitalWrite(REDLED, LOW);
    digitalWrite(GREENLED, HIGH);
    digitalWrite(RELAYPIN, LOW);
    digitalWrite(BUZZERPIN, LOW);
  }
  delay(2000);
}