const int Pr = 2;  // Define the pin connected to the IR sensor


void setup() {
pinMode(Pr, INPUT);
pinMode(22, OUTPUT);
Serial.begin(115200);
}

void loop() {
  int x = digitalRead(Pr);
  if(x == HIGH)
  {
    digitalWrite(22, HIGH);
    Serial.println("obstacle");
  }
  else{
    digitalWrite(22, LOW);
    Serial.println("No obstacle");
  }
  }