int trig = 32;//the pine tree that emits the ultrasound
int echo = 33;//the pine tree that receive the ultrasound
long lecture_echo;
long cm;

void setup(){

pinMode(trig, OUTPUT);
digitalWrite(trig, LOW);
pinMode(echo, INPUT);
Serial.begin(115200);//sensor baudrate

}

void loop(){
//sends ultrasound for 100 microseconds, then stops
digitalWrite(trig, HIGH);
delayMicroseconds(100);
digitalWrite(trig, LOW);
//read the value and convert it into cm
lecture_echo = pulseIn(echo,HIGH);
cm = lecture_echo /58;
//displays the result
Serial.print("Distance in cm :");
Serial.println(cm);
delay(1000);
}