const int trigPin = 9; // pin trigger sensor ultrasonik
const int echoPin = 10; // pin echo sensor ultrasonik
const int ledPin = 13; // pin LED
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
}
void loop() {
long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = duration * 0.034 / 2; // menghitung jarak dengan rumus dari datasheet
Serial.print("Jarak : ");
Serial.print(distance);
Serial.println(" cm");
if(distance < 10) { // jika jarak kurang dari 10 cm
digitalWrite(ledPin, HIGH); // nyalakan LED
} else {
digitalWrite(ledPin, LOW); // matikan LED
}
delay(500); // tunggu selama 0,5 detik
}