int trigPin = 7; //Trig
int echoPin = 6; //Echo
long duration, cm, meter;
void setup() {
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
cm = (duration/2) / 29.1;
meter = (duration/2) / 100;
Serial.print(meter);
Serial.print("m, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(250);
}