#define PIR 17
#define trig 18
#define echo 19
#define led1 15
#define led2 2
#define led3 4
#define Buzzer 16

void setup() {
  // put your setup code here, to run once:
  // Serial.begin(115200);
  // Serial.println("Hello, ESP32!");

   pinMode (PIR, INPUT);
  pinMode (echo, INPUT);
  pinMode (trig, OUTPUT);
  pinMode (led1, OUTPUT);
  pinMode (led2, OUTPUT);
  pinMode (led3, OUTPUT);
  pinMode (Buzzer, OUTPUT);
  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
  // delay(10); // this speeds up the simulation

  int Peer = digitalRead(PIR);

  Serial.println(Peer);
  delay(500);

  digitalWrite (trig, LOW);
  digitalWrite (trig, HIGH);
  delay(10);
  digitalWrite (trig, LOW);

  int t = pulseIn (echo, HIGH);
  int s = t*0.034/2;

  Serial.println(s);
  delay(10);

  if (Peer == 1 || s == 25){
      digitalWrite (led1, HIGH);
      digitalWrite (led2, HIGH);
      digitalWrite (led3, HIGH);
      digitalWrite (Buzzer, HIGH);
    } else if (Peer == 0 || s >= 25){
      digitalWrite (led1,  LOW);
      digitalWrite (led2, LOW);
      digitalWrite (led3, LOW);
      digitalWrite (Buzzer, LOW);
      delay(100);
      } else {
        digitalWrite (led1,  LOW);
        digitalWrite (led2, LOW);
        digitalWrite (led3, LOW);
        digitalWrite (Buzzer, LOW);
        }
}