Test RFID_LCD Blynk

/*PIN SDA/SS : D2
 *PIN SCK : D5
 *PIN MOSI: D7
 *PIN MISO: D6
 *PIN GND : GND
 *PIN RST : D1
 *PIN 3.3V: 3V
 */

#define BLYNK_PRINT Serial

#include <SPI.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <MFRC522.h>

#define SS_PIN D2
#define RST_PIN D1

char auth[] = "Token Blynk";
char ssid[] = "Nama Wifi";
char pass[] = "Pass Wifi";
char server[] = "blynk-cloud.com";
int port = 8442;

MFRC522 rfid(SS_PIN, RST_PIN);
MFRC522::MIFARE_Key key;
WidgetLCD lcd(V1);    //Pin Virtual LCD di Blynk

String strID;

void setup()
{
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass, server, port);
  SPI.begin(); // Init SPI bus
  rfid.PCD_Init(); // Init MFRC522
}

void loop()
{
  Blynk.run();
  lcd.clear();
  if (!rfid.PICC_IsNewCardPresent() || !rfid.PICC_ReadCardSerial()) return;
  MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);
  if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&
      piccType != MFRC522::PICC_TYPE_MIFARE_1K &&
      piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
    Serial.println(F("Your tag is not of type MIFARE Classic."));
    return;
  }
  strID = "";
  for (byte i = 0; i < 4; i++) {
    strID +=
      (rfid.uid.uidByte[i] < 0x10 ? "0" : "") +
      String(rfid.uid.uidByte[i], HEX) +
      (i != 3 ? ":" : "");
  }
  strID.toUpperCase();

  //Cetak di Serial Monitor apabila RFID Tag terdeteksi
  if (strID != NULL)
  {
    lcd.print(0, 0, "ID dari RFID :");
    lcd.print(0, 1, strID);
    delay(2000);
  }

  else{
    lcd.print(0, 0, "ID dari RFID :");
    lcd.print(0, 1, "Tidak ditemukan");
    delay(2000);
  }
}