int echo = 10;
int trig = 12;

void setup() {
 Serial.begin(115200);
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
}

void loop() {
digitalWrite(trig, LOW);
delayMicroseconds(5);

digitalWrite(trig, LOW);
delayMicroseconds(10);

digitalWrite(trig, HIGH);

long time = pulseIn(echo, HIGH);

float distance = (time * 0.034)/2;


Serial.print("Distance; ");
Serial.print(distance);
Serial.println("cm");
delay(2500);
}