Rain notification using esp32 and blynk

#define BLYNK_TEMPLATE_ID "TMPL6I5vSmQTt"
#define BLYNK_TEMPLATE_NAME "NOTIFIKASI HUJAN"
#define BLYNK_AUTH_TOKEN "Co718u70V31kGp4laKJHRneO2NRN9rLd"

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

// Masukkan Auth token yang sudah dibuat
char auth[] = "Co718u70V31kGp4laKJHRneO2NRN9rLd";

//Masukkan WIFI SSID dan password
char ssid[] = "Wifiku ";
char pass[] = "PargoyDong";


int buzzerPin = 13;
int read_hujan = 0;
//int buttonState = 0;
//const int buttonPin = 21;

#define sensor_hujan 4



BlynkTimer timer;
int hold=0;


void hujanNotify()
{
   read_hujan = digitalRead(sensor_hujan);

 if (read_hujan==0 && hold==0) {
     Serial.println("Hujan");
     Blynk.logEvent("hujan","Awas Hujan !!!");
    hold=1;
     Blynk.virtualWrite(V2, "Awas Hujan !!!");
    
  }
  else if (read_hujan==1 && hold==1)
  {
     Serial.println("Cerah");
     Blynk.logEvent("cerah","Cuaca Cerah");
    hold=0;
      Blynk.virtualWrite(V2,"Cuaca Cerah");
  } 
}

void setup(){
  pinMode(sensor_hujan,INPUT);
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
  timer.setInterval(2500L, hujanNotify);
  
 
  
 
}


void loop(){
int kondisi_sensor = digitalRead(sensor_hujan);

      if (kondisi_sensor == 0)               
        tone(buzzerPin,500,500);
        
          else{
          digitalWrite(buzzerPin,LOW);
          }
          

  delay(1000);
  Blynk.run();
  timer.run();
  

    
}