#define BLYNK_TEMPLATE_ID "TMPL6NanSot4U"
#define BLYNK_TEMPLATE_NAME "Muhammad Erandu Fasha Ibrahim"
#define BLYNK_AUTH_TOKEN "OXI-YW2umc5pXgTffFj-4_Fw51jqxZ6W"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "OXI-YW2umc5pXgTffFj-4_Fw51jqxZ6W";
const char *ssid = "Wokwi-GUEST";
const char *pass = "";

int hijau = 5;
int merah = 18;
const int trigPin = 2;
const int echoPin = 15;

#define KecepatanSuara 0.034

long durasi;
float jarak;

void LED(){
if (jarak <10){
digitalWrite(merah, HIGH);
delay(100);
digitalWrite(merah, LOW);
delay(100);}
else{
digitalWrite(hijau, HIGH);
delay(100);
digitalWrite(hijau, LOW);
delay(100);}
}

WidgetLED led(V5);

void blinkLedWidget()
{
  if (jarak <100) {
    led.off();
    Serial.println("LED on V5: off");
  } else {
    led.on();
    Serial.println("LED on V5: on");
  }
}

void sendDistance() {
  long durasi, jarak;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  durasi = pulseIn(echoPin, HIGH);
  jarak = (durasi / 2) / 29.1; // Konversi waktu menjadi jarak dalam sentimeter
  Blynk.virtualWrite(V0, jarak); // Mengirim data ke widget Blynk
}

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(merah, OUTPUT);
  pinMode(hijau, OUTPUT);
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  durasi = pulseIn(echoPin, HIGH);

  jarak = durasi * KecepatanSuara/2;

  Serial.print("jarak (cm): ");
  Serial.println(jarak);
  delay(1000);
  blinkLedWidget();
  sendDistance();
  LED();
  Blynk.run();
}