#define ECHO_PIN 2
#define TRIG_PIN 3
float X=1.006;
void setup() {
// put your setup code here, to run once:
Serial.begin (115200);
pinMode(TRIG_PIN, OUTPUT);
pinMode (ECHO_PIN, INPUT );
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(TRIG_PIN, LOW);
delayMicroseconds (2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds (10);
digitalWrite(TRIG_PIN, LOW);
//read ultrasonic signal
int duration = pulseIn (ECHO_PIN,HIGH);
float distance = duration * 0.034 * X / 2;
Serial.print("Jarak: ");
Serial.print(distance);
//Serial.print (distance);
Serial.println("CM ");
delay (100);
}