//project dhimas XI TAV 27 may
#define pinTrig 3
#define pinEcho 2
#define buzzer 9

#include <Servo.h>
Servo servodhimas;

long waktu;

void setup() {
  Serial.begin(9600);
  servodhimas.attach(11);
  pinMode(1, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(pinTrig, OUTPUT);
  pinMode(pinEcho, INPUT);
  pinMode(buzzer, OUTPUT);
}

float ultrasonik() {
  digitalWrite(pinTrig, LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrig, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrig, LOW);
  waktu = pulseIn(pinEcho, HIGH);
  return waktu * 0.034 / 2;
}

void loop() {
  float jarak = ultrasonik();
  Serial.println(jarak);

  if (jarak > 100) {
    aman();
    servodhimas.write(90);
  } else if (jarak > 25 && jarak <= 100) {
    hatihati();
    servodhimas.write(90);
  } else {
    bahaya();
    servodhimas.write(0);
  }
}

void aman() {
  digitalWrite(6, HIGH);
  digitalWrite(5, LOW);
  digitalWrite(1, LOW);
  noTone(buzzer);
  delay(500);
  digitalWrite(6, LOW);
  delay(500);
}

void hatihati() {
  digitalWrite(6, LOW);
  digitalWrite(5, HIGH);
  digitalWrite(1, LOW);
  tone(buzzer, 1000);
  delay(250);
  noTone(buzzer);
  digitalWrite(5, LOW);
  delay(250);
}

void bahaya() {
  digitalWrite(6, LOW);
  digitalWrite(5, LOW);
  digitalWrite(1, HIGH);
  tone(buzzer, 2000);
  delay(100);
  noTone(buzzer);
  digitalWrite(1, LOW);
  delay(100);
}