#define BLYNK_PRINT Serial 
#define BLYNK_TEMPLATE_ID "TMPL6TWWwAvgf" 
#define BLYNK_TEMPLATE_NAME "Sekuritas Rumah" 
#define BLYNK_AUTH_TOKEN "" 
 
#include <WiFi.h> 
#include <WiFiClient.h> 
#include <BlynkSimpleEsp32.h> 
#include <LiquidCrystal_I2C.h> 
LiquidCrystal_I2C lcd(0x27, 20, 4); 
 
#define pinPIR 13 
#define buzzer 18 
#define lampu 4 
int a; int saklar 
= 0; 
 const float GAMMA = 
 0.7; const float RL10 = 
 50; 
 char auth[] = 
 BLYNK_AUTH_TOKEN; char ssid[] = 
 "Wokwi-GUEST"; char pass[] = 
 "";  
BlynkTimer timer; 
 
BLYNK_WRITE(V4){   saklar = 
(param.asInt());     if 
(saklar == 0) {             
  a = LOW;    }else{     a = 
  HIGH; 
  }  
}  void baca_sensor_gerak(){   int analogValue = analogRead(36);   float 
voltage = analogValue * 5/4095.0;   float resistance = 2000 * voltage / 
(1 - voltage / 5);   int lux = pow(RL10 * 1e3 * pow(10, GAMMA) / 
resistance, (1 / GAMMA));   lcd.setCursor(0, 1);   lcd.print("                    
");   lcd.setCursor(0, 1);   
  lcd.print("Cahaya: "+String(lux)+" lux");   
  Blynk.virtualWrite(V0, lux);    if (a == 
  LOW){   if (lux < 50){     int nilaiPir = 
  digitalRead((pinPIR));     if(nilaiPir == 
  1){       tone(buzzer, 120); 
      Blynk.virtualWrite(V1, "Ada Orang Masuk");   
      Blynk.virtualWrite(V3, "Buzzer Aktif");  
      Blynk.virtualWrite(V2, "Lampu Menyala dan sistem sekuritas ON");       
  digitalWrite (lampu, HIGH);        lcd.setCursor(0, 2);       lcd.print("                    
  ");       lcd.setCursor(0, 2);       lcd.print("Ada Orang Masuk");       
  lcd.setCursor(0, 3);       lcd.print("                    ");       
  lcd.setCursor(0, 3); 
      lcd.print("Sistem Sekuritas ON");   
      } 
        else{     
      noTone(buzzer); 
          Blynk.virtualWrite(V1, "Tidak Ada Gerakan");       
      Blynk.virtualWrite(V3, "Buzzer Tidak Aktif");     
      lcd.setCursor(0, 2);     lcd.print("                    
      ");     lcd.setCursor(0, 2);     lcd.print("Tidak 
      Ada Orang");     lcd.setCursor(0, 3);     
      lcd.print("                    ");     lcd.setCursor(0, 
      3); 
    lcd.print("Sistem Sekuritas ON"); 
  }   
  } 
  if (lux > 50){ 
    Blynk.virtualWrite(V2, "Lampu Mati, Sistem Sekuritas OFF");        
  digitalWrite (lampu, LOW);     lcd.setCursor(0, 2);     
  lcd.print("                    ");     lcd.setCursor(0, 2);     
  lcd.print("Sistem Sekuritas OFF");     lcd.setCursor(0, 3);     
  lcd.print("                    ");     lcd.setCursor(0, 3);     
  lcd.print("Kondisi Siang Hari"); 
  }   }else{     
    noTone(buzzer);     
    digitalWrite (lampu, LOW); 
    Blynk.virtualWrite(V2, "Sistem Sekuritas OFF, Set Saklar"); 
    Blynk.virtualWrite(V1, "OFF");       
    Blynk.virtualWrite(V3, "OFF");     
    lcd.setCursor(0, 2);     lcd.print("                    
    ");     lcd.setCursor(0, 2);     
    lcd.print("Sistem Sekuritas OFF");     
    lcd.setCursor(0, 3);     lcd.print("                    ");     
    lcd.setCursor(0, 3);     lcd.print("Aktifkan Sistem"); 
  }  
  }   void 
  setup() {   
  lcd.init();   
  lcd.backlight(
  ); 
  Blynk.begin(auth, ssid, pass);   
  timer.setInterval(1000L, baca_sensor_gerak);   
  pinMode(lampu, OUTPUT);   pinMode(pinPIR, 
  INPUT);   pinMode(buzzer, OUTPUT);  
}  void loop() {   
  delay(1000); lcd.setCursor 
  (0, 0); lcd.print("Sekuritas 
  Rumah"); baca_sensor_gerak(); 
  Blynk.run(); timer.run(); 
}