#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>


#define BLYNK_TEMPLATE_ID "TMPL2p7jThzR"
#define BLYNK_TEMPLATE_NAME "Sensor Banjir"
#define BLYNK_AUTH_TOKEN "XNY_eMrTqCAoX7xRwjRHG-WDABDgrNVa"
#define ECHO_PIN 15
#define TRIG_PIN 2
#define buzzer 4
float distance =0.0;
int a = 0;

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

void setup() {
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensor);

  Blynk.virtualWrite(V0, "-");
  Blynk.virtualWrite(V1, "-");
  Blynk.virtualWrite(V2, "-");
  Blynk.virtualWrite(V3, 0);
}

void loop() {  
  sendSensor();
  Blynk.run();
  timer.run(); 

}

 BLYNK_WRITE(V3) {
  int newValue = param.asInt(); // Membaca nilai dari widget slider
  distance = newValue; // Mengganti nilai variabel a dengan nilai baru
}

void sendSensor()
{
  if (a == 0){
  if (distance <= 0 && distance <= 20){
    Blynk.virtualWrite(V1, "Aman");
    Blynk.virtualWrite(V0, "Buzzer OFF");
    noTone(buzzer);
    Blynk.virtualWrite(V2,distance);
  }
  if (distance > 20 && distance <= 50){
    Blynk.virtualWrite(V1, "Siaga 1");
    Blynk.virtualWrite(V0, "Buzzer ON");
    Blynk.virtualWrite(V2,distance);
    delay(1);
    tone (buzzer, 150);
    delay(500);
    noTone(buzzer);
  }
  if (distance > 50){
    Blynk.virtualWrite(V1, "BAHAYA!!");
    Blynk.virtualWrite(V0, "Buzzer ON");
    Blynk.virtualWrite(V2,distance);
    delay(1);
    tone (buzzer, 300);
    delay(5000);
    noTone(buzzer);
  }
  delay(100);  
  }
}