Arduino code.txt

int echo=9;
int trig=8;

int val;
void setup() {
  Serial.begin(9600);
 pinMode(trig,OUTPUT);
pinMode(echo,INPUT);
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(trig, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trig, HIGH);
  delayMicroseconds(20);
  digitalWrite(trig, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  int duration = pulseIn(echo, HIGH);
  // Calculating the distance
  int distance = duration * 0.034 / 2;
  if (Serial.available() > 0) {
    if(distance<=25 && distance >0)
    {
    String message = (String) "detected" +distance+ " centimetres ahead";
          
    Serial.println(message);
    }
        delay(5000);

  }

  // switch (val) {
  //   case '1':
  //     String message =(String)"Distance =" +distance+ "  front";

  //     Serial.println(message)1
  //    break;

  //   case '2':
  //    break;
  
      

  // }

}