void setup() {
Serial.begin(9600);
pinMode(13, OUTPUT);
pinMode(4, INPUT);
}
void loop() {
int pirStatus = digitalRead(4);
if (pirStatus==1) {
digitalWrite(13, HIGH);
Serial.print("person is present ");
Serial.println(pirStatus);
} else {
digitalWrite(13, LOW);
Serial.print("nobody is here");
Serial.println(pirStatus);
delay(10);
}
}