#define BLYNK_TEMPLATE_ID "TMPL6tDc_WYHI"
#define BLYNK_TEMPLATE_NAME "Keamanan Pintu"
#define BLYNK_AUTH_TOKEN "_EkIC6enYr4p8pnQkorm8vpqRxGjtgcU"

#include <Wire.h>
#include <PCF8574.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

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

const int buttonPin1 = 2;
const int buttonPin2 = 4;
int buttonState1 = 0;
int buttonState2 = 0;

const float GAMMA = 0.7;
const float RL10 = 50;
int ldrPin = 34;    
int ldrVal = 0;  

LiquidCrystal_I2C lcd(0x27, 16, 2);
PCF8574 pcf8574(0x20); 

BLYNK_WRITE(V0) {
  int pinValue = param.asInt();
  if (pinValue == 1) {
    pcf8574.digitalWrite(P0, LOW);
    pcf8574.digitalWrite(P1, LOW);
    pcf8574.digitalWrite(P2, LOW);
    pcf8574.digitalWrite(P3, LOW);
    Serial.println("Terkunci");
  } else {
    pcf8574.digitalWrite(P0, HIGH);
    pcf8574.digitalWrite(P1, HIGH);
    pcf8574.digitalWrite(P2, HIGH);
    pcf8574.digitalWrite(P3, HIGH);
    Serial.println("Terbuka");
  }
}

BLYNK_CONNECTED() { 
  Blynk.syncAll();
}

void setup() {
  Blynk.begin(auth, ssid, pass);
  Serial.begin(9600);
  Wire.begin();
  pcf8574.begin();
  lcd.init();
  lcd.backlight();
  pcf8574.pinMode(P0, OUTPUT);
  pcf8574.pinMode(P1, OUTPUT);
  pcf8574.pinMode(P2, OUTPUT);
  pcf8574.pinMode(P3, OUTPUT);
  pcf8574.pinMode(P4, OUTPUT);
  pcf8574.pinMode(P5, OUTPUT);
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pcf8574.digitalWrite(P0, LOW);
  pcf8574.digitalWrite(P1, LOW);
  pcf8574.digitalWrite(P2, LOW);
  pcf8574.digitalWrite(P3, LOW);
  pcf8574.digitalWrite(P4, HIGH);
  pcf8574.digitalWrite(P5, LOW);
}

void loop() {
  Blynk.run();
  delay(1000);
  ldrVal = analogRead(ldrPin); 
  float voltage = ldrVal * (3.3 / 4095.0); 
  float resistance = 2000 * voltage / (3.3 - voltage);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  
  buttonState1 = digitalRead(buttonPin1);
  buttonState2 = digitalRead(buttonPin2);

    if (lux < 1500) {
  Blynk.logEvent("ldr","Ada Pencuri....!!!");
  pcf8574.digitalWrite(P5, HIGH);
  delay(2000);
  } else {
  pcf8574.digitalWrite(P5, LOW);
  }
   
    if (buttonState1 == LOW) {
    Blynk.logEvent("tombol","Ada tamu");
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print("Tunggu sebentar");
    delay(2000);

  } else if (buttonState2 == LOW) {
    Blynk.logEvent("tombol","Ada tamu");
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Mohon maaf,");
    delay(2000);

    lcd.setCursor(0, 0);
    lcd.print("penghuni rumah");    
    lcd.setCursor(0, 1);
    lcd.print("sedang pergi  ");
    delay(2000);

    lcd.setCursor(0, 0);
    lcd.print("Hubungi nomor:");
    lcd.setCursor(0, 1);
    lcd.print("08xx-xxxx-xxxx");
    delay(10000);

  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Selamat Datang");
    delay(2000);
    }
}