#define ECHO_PIN 12
#define TRIG_PIN 11
#include <Servo.h>
Servo servoku;
int sudut;

void setup() {
  servoku.attach(9);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

float jarak_cm(){
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int durasi = pulseIn(ECHO_PIN, HIGH);
  return durasi*0.034/2;
}

void loop() {
  float jarak=jarak_cm();
  if(jarak>150){
    servoku.write(90);
  }
  else {
    servoku.write(180);
    delay(5000); // delay 5 detik sebelum palang turun
  }
}