#define BLYNK_TEMPLATE_ID "TMPLxxxxxx"
#define BLYNK_TEMPLATE_NAME "Pendeteksi Banjir"
#define BLYNK_AUTH_TOKEN "AuthTokenKamu"

#include <WiFi.h>

#define TRIG_PIN 5
#define ECHO_PIN 18
#define LED_KUNING 2
#define LED_MERAH 4
#define BUZZER 19

long duration;
int distance;
int level;

void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(LED_MERAH, OUTPUT);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  // Kirim pulsa trigger ke sensor HC-SR04
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Baca nilai echo dan konversi ke jarak
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = duration * 0.034 / 2;

  Serial.print("Jarak: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Tentukan level banjir
  if (distance > 30) {
    level = 0; // Aman
  } else if (distance > 20) {
    level = 1; // Waspada
  } else if (distance > 10) {
    level = 2; // Siaga
  } else {
    level = 3; // Bahaya
  }

  // Logika setiap level
  if (level == 0) {
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, LOW);
    noTone(BUZZER);
  } 
  else if (level == 1) {
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, LOW);
    for (int i = 0; i < 5; i++) {  // 5 kali bunyi
      tone(BUZZER, 1000);
      delay(300);
      noTone(BUZZER);
      delay(300);
    }
  } 
  else if (level == 2) {
    digitalWrite(LED_KUNING, HIGH);
    digitalWrite(LED_MERAH, LOW);
    for (int i = 0; i < 10; i++) {  // 10 kali bunyi
      tone(BUZZER, 1000);
      delay(200);
      noTone(BUZZER);
      delay(200);
    }
  } 
  else if (level == 3) {
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, HIGH);
    for (int i = 0; i < 10; i++) {  // 10 kali bunyi lebih cepat
      tone(BUZZER, 1500);
      delay(100);
      noTone(BUZZER);
      delay(100);  // lebih cepat jedanya
    }
  }

  delay(1000);
}