const int pr=2;
void setup() {
  
  pinMode(pr, INPUT);
  pinMode(22, OUTPUT);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

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