#include <DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22
#define PIRPIN 12
#define LEDPIN 4
#define BUZZERPIN 14
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
 pinMode(PIRPIN, INPUT);
 pinMode(LEDPIN, OUTPUT);
 pinMode(BUZZERPIN, OUTPUT);
}
void loop() {
 int pirState = digitalRead(PIRPIN);
 float humidity = dht.readHumidity();
 float temperature = dht.readTemperature();
if (isnan(humidity) || isnan(temperature)) {
Serial.println("Failed to read from DHT sensor!");
 return;
 }
Serial.print("Humidity: ");
Serial.print(humidity);
Serial.print(" %\tTemperature: ");
Serial.print(temperature);
Serial.println(" *C");
 if (pirState == HIGH) {
 digitalWrite(LEDPIN, HIGH);
 digitalWrite(BUZZERPIN, HIGH);
 delay(500);
 digitalWrite(BUZZERPIN, LOW);
 delay(500);
 } else {
 digitalWrite(LEDPIN, LOW);
 digitalWrite(BUZZERPIN, LOW);
 }
 delay(2000);
}