#define echoPin 32
#define trigPin 33
#define motionPin 27
#define ledPin 25

long duration;
int distance;
int motionSignal;





void ultrasonic() {
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration * 0.034 / 2; 
    //Serial.print("Distance: ");
    //Serial.println(distance);
    
    delay(500); 
}


void motion() {

motionSignal=digitalRead(motionPin);

}




void setup() {
    Serial.begin(9600);
    pinMode(trigPin, OUTPUT); 
    pinMode(echoPin, INPUT); 
    pinMode(motionPin, INPUT);
    pinMode(ledPin, OUTPUT);
    delay(2000); 
}

void loop() {
    
    ultrasonic();
    motion();
   if(motionSignal==HIGH)
   {
    if(distance>=90)
    {
      Serial.println("child");
      digitalWrite(ledPin, HIGH);
      delay(1000);
    }
   else
   {
    Serial.println("adult");
      digitalWrite(ledPin, LOW);
      delay(1000);
   }
  }
  else 
  {
    Serial.println("motion not detected");
  }

}

// made by Rashi,Sidharth,&