RFID Logger Problem

Atahan-Uyanik · September 5, 2023, 9:25am

Hi there; I would like to get support from you for a problem that happened to me for the first time about the software I developed. I made an RFID logger. I used the RC522 module as an RFID reader. I can detect the current time with the DS3231 RTC module. Finally, I used the SD card module. The operation of the algorithm firstly the user reads his own RFID card. Then, when he reads the RFID card of the door, the current date and time information is recorded on the SD card. The system I developed works. I share the software below.

#include <Arduino.h>
#include <SPI.h>
#include <MFRC522.h>
#include <uRTCLib.h>
#include <SD.h>

#define RFID_RST_PIN 9
#define RFID_SS_PIN 10
#define SD_SS_PIN 4
#define BLUE_LED_PIN 3
#define RED_LED_PIN 5
#define GREEN_LED_PIN 6
#define BUTTON_PIN 7
#define BUZZER_PIN 8

void RFID_READER();
void DATE_TIME();
void SAVE_LOG();
void TRANSFER_LOG();
void CREATE_NEW_FILE();

MFRC522 rfid(RFID_SS_PIN, RFID_RST_PIN);
byte ID_1[4] = {0x9D, 0x3A, 0x4F, 0x31};
byte ID_2[4] = {0xEA, 0x0E, 0xC9, 0x9E};
byte ID_3[4] = {0xBA, 0xD9, 0xC6, 0x9E};
byte ID_4[4] = {0x6A, 0x64, 0xB1, 0x15};
byte ID_5[4] = {0xFA, 0x58, 0xC1, 0x9E};
byte ID_6[4] = {0x3A, 0xCF, 0xBE, 0x9E};
byte ID_7[4] = {0xBA, 0x3A, 0x60, 0x9F};

byte securityID_1[4] = {0x7A, 0xB2, 0x65, 0x9F};
byte securityID_2[4] = {0x9A, 0x94, 0x55, 0x9F};
byte securityID_3[4] = {0xBA, 0xA5, 0x5A, 0x9F};
byte securityID_4[4] = {0x5A, 0x85, 0x6B, 0x9F};
byte securityID_5[4] = {0xEA, 0xEC, 0x8B, 0x9E};
byte securityID_6[4] = {0x8A, 0x5C, 0x80, 0x9E};
byte securityID_7[4] = {0x0A, 0x62, 0x8E, 0x9E};
byte securityID_8[4] = {0x3A, 0xB1, 0x6D, 0x6C};
byte securityID_9[4] = {0x7A, 0x88, 0x75, 0x6C};
byte securityID_10[4] = {0xCA, 0x7C, 0x72, 0x6C};
byte securityID_11[4] = {0xAA, 0x38, 0x73, 0x6C};
byte securityID_12[4] = {0x3A, 0xC6, 0x73, 0x6C};
byte securityID_13[4] = {0xEA, 0x31, 0x6B, 0x6C};
byte securityID_14[4] = {0x8A, 0x85, 0x4D, 0xA0};

byte adminID_1[4] = {0x8A, 0x15, 0x7D, 0x9E};

uRTCLib rtc(0x68);

char daysOfWeek[7][12] = {"Pazartesi", "Salı", "Çarşamba", "Perşembe", "Cuma", "Cumartesi", "Pazar"};
int buttonState, voltageValue;
String gate, securityName, currentDay, currentMonth, currentYear, currentHour, currentMinute, currentSecond;
String fileName = "MERKEZ.txt";
char bufferDay[20], bufferMonth[20], bufferYear[20], bufferHour[20], bufferMinute[20], bufferSecond[20];
bool logTime = false;
bool securityCardPressed = false;
bool adminLogin = false;

File myFile;

void setup()
{
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  SPI.begin();
  rfid.PCD_Init();
  URTCLIB_WIRE.begin();
  SD.begin(SD_SS_PIN);

  //rtc.set(0, 7, 17, 2, 15, 8, 23); //Saati kalibra ederken (Saniye, Dakika, Saat, Gün Adı, Gün Tarihi, Ay, Yıl)
  DATE_TIME();
  for (int i = 0; i < 3; i++)
  {
    digitalWrite(GREEN_LED_PIN, HIGH);
    delay(250);
    digitalWrite(GREEN_LED_PIN, LOW);
    delay(250);
  }

  
  // CREATE_NEW_FILE();
}

void loop()
{
  //rtc.refresh();
  RFID_READER();
  SAVE_LOG();
  TRANSFER_LOG();
}

void RFID_READER()
{

  if ((securityCardPressed == false) && (adminLogin == false))
  {
    digitalWrite(RFID_SS_PIN, LOW);
    digitalWrite(SD_SS_PIN, HIGH);
    if (!rfid.PICC_IsNewCardPresent()) // Yeni Kartın Okunmasını Bekle
    {
      return;
    }

    if (!rfid.PICC_ReadCardSerial()) // Kart Okunmadığı Zaman Bekle
    {
      return;
    }

    if ((rfid.uid.uidByte[0] == securityID_1[0]) && (rfid.uid.uidByte[1] == securityID_1[1]) && (rfid.uid.uidByte[2] == securityID_1[2]) && (rfid.uid.uidByte[3] == securityID_1[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G1";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_2[0]) && (rfid.uid.uidByte[1] == securityID_2[1]) && (rfid.uid.uidByte[2] == securityID_2[2]) && (rfid.uid.uidByte[3] == securityID_2[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G2";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_3[0]) && (rfid.uid.uidByte[1] == securityID_3[1]) && (rfid.uid.uidByte[2] == securityID_3[2]) && (rfid.uid.uidByte[3] == securityID_3[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G3";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_4[0]) && (rfid.uid.uidByte[1] == securityID_4[1]) && (rfid.uid.uidByte[2] == securityID_4[2]) && (rfid.uid.uidByte[3] == securityID_4[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G4";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_5[0]) && (rfid.uid.uidByte[1] == securityID_5[1]) && (rfid.uid.uidByte[2] == securityID_5[2]) && (rfid.uid.uidByte[3] == securityID_5[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G5";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_6[0]) && (rfid.uid.uidByte[1] == securityID_6[1]) && (rfid.uid.uidByte[2] == securityID_6[2]) && (rfid.uid.uidByte[3] == securityID_6[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G6";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_7[0]) && (rfid.uid.uidByte[1] == securityID_7[1]) && (rfid.uid.uidByte[2] == securityID_7[2]) && (rfid.uid.uidByte[3] == securityID_7[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G7";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_8[0]) && (rfid.uid.uidByte[1] == securityID_8[1]) && (rfid.uid.uidByte[2] == securityID_8[2]) && (rfid.uid.uidByte[3] == securityID_8[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G8";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_9[0]) && (rfid.uid.uidByte[1] == securityID_9[1]) && (rfid.uid.uidByte[2] == securityID_9[2]) && (rfid.uid.uidByte[3] == securityID_9[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G9";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_10[0]) && (rfid.uid.uidByte[1] == securityID_10[1]) && (rfid.uid.uidByte[2] == securityID_10[2]) && (rfid.uid.uidByte[3] == securityID_10[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G10";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_11[0]) && (rfid.uid.uidByte[1] == securityID_11[1]) && (rfid.uid.uidByte[2] == securityID_11[2]) && (rfid.uid.uidByte[3] == securityID_11[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G11";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_12[0]) && (rfid.uid.uidByte[1] == securityID_12[1]) && (rfid.uid.uidByte[2] == securityID_12[2]) && (rfid.uid.uidByte[3] == securityID_12[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G12";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_13[0]) && (rfid.uid.uidByte[1] == securityID_13[1]) && (rfid.uid.uidByte[2] == securityID_13[2]) && (rfid.uid.uidByte[3] == securityID_13[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G13";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == securityID_14[0]) && (rfid.uid.uidByte[1] == securityID_14[1]) && (rfid.uid.uidByte[2] == securityID_14[2]) && (rfid.uid.uidByte[3] == securityID_14[3]))
    {
      digitalWrite(BLUE_LED_PIN, HIGH);
      delay(200);
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      securityName = "G14";
      securityCardPressed = true;
    }

    else if ((rfid.uid.uidByte[0] == adminID_1[0]) && (rfid.uid.uidByte[1] == adminID_1[1]) && (rfid.uid.uidByte[2] == adminID_1[2]) && (rfid.uid.uidByte[3] == adminID_1[3]))
    {
      digitalWrite(RED_LED_PIN, HIGH);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(RED_LED_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, LOW);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      delay(50);
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      adminLogin = true;
    }

    else
    {
      Serial.println("Access denied");
      Serial.print("ID Number: ");
      for (int j = 0; j < 4; j++)
      {
        Serial.print(rfid.uid.uidByte[j], HEX);
        Serial.print(" ");
      }
      Serial.println();
      digitalWrite(RED_LED_PIN, HIGH);
      delay(250);
      digitalWrite(RED_LED_PIN, LOW);
    }

    rfid.PICC_HaltA();
  }

  if ((logTime == false) && (securityCardPressed == true))
  {
    digitalWrite(RFID_SS_PIN, LOW);
    digitalWrite(SD_SS_PIN, HIGH);
    if (!rfid.PICC_IsNewCardPresent()) // Yeni Kartın Okunmasını Bekle
    {
      return;
    }

    if (!rfid.PICC_ReadCardSerial()) // Kart Okunmadığı Zaman Bekle
    {
      return;
    }

    if ((rfid.uid.uidByte[0] == ID_1[0]) && (rfid.uid.uidByte[1] == ID_1[1]) && (rfid.uid.uidByte[2] == ID_1[2]) && (rfid.uid.uidByte[3] == ID_1[3]))
    {

      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K1";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_2[0]) && (rfid.uid.uidByte[1] == ID_2[1]) && (rfid.uid.uidByte[2] == ID_2[2]) && (rfid.uid.uidByte[3] == ID_2[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K2";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_3[0]) && (rfid.uid.uidByte[1] == ID_3[1]) && (rfid.uid.uidByte[2] == ID_3[2]) && (rfid.uid.uidByte[3] == ID_3[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K3";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_4[0]) && (rfid.uid.uidByte[1] == ID_4[1]) && (rfid.uid.uidByte[2] == ID_4[2]) && (rfid.uid.uidByte[3] == ID_4[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K4";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_5[0]) && (rfid.uid.uidByte[1] == ID_5[1]) && (rfid.uid.uidByte[2] == ID_5[2]) && (rfid.uid.uidByte[3] == ID_5[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K5";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_6[0]) && (rfid.uid.uidByte[1] == ID_6[1]) && (rfid.uid.uidByte[2] == ID_6[2]) && (rfid.uid.uidByte[3] == ID_6[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K6";
      logTime = true;
    }

    else if ((rfid.uid.uidByte[0] == ID_7[0]) && (rfid.uid.uidByte[1] == ID_7[1]) && (rfid.uid.uidByte[2] == ID_7[2]) && (rfid.uid.uidByte[3] == ID_7[3]))
    {
      Serial.println("Authorized access");
      Serial.print("ID Number: ");
      for (int i = 0; i < 4; i++)
      {
        Serial.print(rfid.uid.uidByte[i], HEX);
        Serial.print(" ");
      }
      Serial.println();
      DATE_TIME();
      digitalWrite(BUZZER_PIN, HIGH);
      delay(50);
      digitalWrite(BUZZER_PIN, LOW);
      digitalWrite(GREEN_LED_PIN, HIGH);
      delay(200);
      digitalWrite(GREEN_LED_PIN, LOW);
      gate = "K7";
      logTime = true;
    }

    else
    {
      Serial.println("Access denied");
      Serial.print("ID Number: ");
      for (int j = 0; j < 4; j++)
      {
        Serial.print(rfid.uid.uidByte[j], HEX);
        Serial.print(" ");
      }
      Serial.println();
      digitalWrite(RED_LED_PIN, HIGH);
      delay(250);
      digitalWrite(RED_LED_PIN, LOW);
    }

    rfid.PICC_HaltA(); // Kart 1 Kere Okunduktan Sonra Bekle
  }
}

void DATE_TIME()
{
  rtc.refresh();
  currentDay = (rtc.day() < 10) ? "0" + String(rtc.day()) : String(rtc.day());
  currentMonth = (rtc.month() < 10) ? "0" + String(rtc.month()) : String(rtc.month());
  currentYear = String(rtc.year());
  currentHour = (rtc.hour() < 10) ? "0" + String(rtc.hour()) : String(rtc.hour());
  currentMinute = (rtc.minute() < 10) ? "0" + String(rtc.minute()) : String(rtc.minute());
  currentSecond = (rtc.second() < 10) ? "0" + String(rtc.second()) : String(rtc.second());

  // if ((rtc.day() == 1) && (rtc.hour() == 0) && (rtc.minute() == 0))
  // {
  //   CREATE_NEW_FILE();
  // }
}

void SAVE_LOG()
{
  if (logTime == true)
  {
    digitalWrite(RFID_SS_PIN, HIGH);
    digitalWrite(SD_SS_PIN, LOW);
    SD.begin(SD_SS_PIN);

    myFile = SD.open(fileName, FILE_WRITE);
    if (myFile)
    {
      myFile.print(securityName);
      myFile.print("_");
      myFile.print(gate);
      myFile.print("_");
      myFile.print(currentDay);
      myFile.print(".");
      myFile.print(currentMonth);
      myFile.print(".");
      myFile.print(currentYear);
      myFile.print("_");
      myFile.print(currentHour);
      myFile.print(":");
      myFile.print(currentMinute);
      myFile.print(":");
      myFile.println(currentSecond);

      if (gate == "K7")
      {
        myFile.println("**********");
      }

      Serial.print(securityName);
      Serial.print(":  ");
      Serial.print(gate);
      Serial.print(" => ");
      Serial.print(currentDay);
      Serial.print('/');
      Serial.print(currentMonth);
      Serial.print('/');
      Serial.print(currentYear);

      Serial.print(" (");
      Serial.print(daysOfWeek[rtc.dayOfWeek() - 1]);
      Serial.print(") ");

      Serial.print(currentHour);
      Serial.print(':');
      Serial.print(currentMinute);
      Serial.print(':');
      Serial.println(currentSecond);
      Serial.println("------------------------------------------------------------");
      logTime = false;
      securityCardPressed = false;
    }

    else
    {
      for (int i = 0; i < 3; i++)
      {
        digitalWrite(RED_LED_PIN, HIGH);
        digitalWrite(BUZZER_PIN, HIGH);
        delay(250);
        digitalWrite(RED_LED_PIN, LOW);
        digitalWrite(BUZZER_PIN, LOW);
        delay(250);
      }
      logTime = false;
      securityCardPressed = false;
    }

    myFile.close();
  }
}

void TRANSFER_LOG()
{

  if (Serial.available())
  {
    char serialData = Serial.read();
    if (serialData == 'r')
    {
      adminLogin = true;
    }
  }
  if (adminLogin == true)
  {
    SD.begin(SD_SS_PIN);
    digitalWrite(RFID_SS_PIN, HIGH);
    digitalWrite(SD_SS_PIN, LOW);
    myFile = SD.open(fileName);
    if (myFile)
    {
      while (myFile.available())
      {
        Serial.write(myFile.read());
        digitalWrite(BLUE_LED_PIN, HIGH);
        digitalWrite(RED_LED_PIN, HIGH);
      }
      digitalWrite(BLUE_LED_PIN, LOW);
      digitalWrite(RED_LED_PIN, LOW);
      myFile.close();
      adminLogin = false;
    }

    // buttonState = digitalRead(BUTTON_PIN);
    // if (buttonState == 1)
    // {
    //   adminLogin = true;
    // }

    // if ((buttonState == 0) && (adminLogin == true))
    // {
    //   SD.begin(SD_SS_PIN);
    //   digitalWrite(RFID_SS_PIN, HIGH);
    //   digitalWrite(SD_SS_PIN, LOW);
    //   myFile = SD.open(fileName);
    //   if (myFile)
    //   {
    //     while (myFile.available())
    //     {
    //       Serial.write(myFile.read());
    //       digitalWrite(BLUE_LED_PIN, HIGH);
    //       digitalWrite(RED_LED_PIN, HIGH);
    //     }
    //     digitalWrite(BLUE_LED_PIN, LOW);
    //     digitalWrite(RED_LED_PIN, LOW);
    //     myFile.close();
    //     adminLogin = false;
    //   }

    else
    {
      Serial.println("HATA");
    }
  }
}

// void CREATE_NEW_FILE()
// {
//   SD.begin(SD_SS_PIN);
//   digitalWrite(RFID_SS_PIN, HIGH);
//   digitalWrite(SD_SS_PIN, LOW);
//   if (SD.exists(fileName))
//   {
//     myFile.close();
//   }
//   fileName = "20" + currentYear + "_" + currentMonth + ".txt";
//   myFile = SD.open(fileName, FILE_WRITE);
//   delay(100);
//   myFile.close();
// }

My problem is as follows, when I disconnect the power of the arduino and reconnect it, the system does not work. By the way, I connect the arduino to the PC with a cable. When I reinstall the software on the arduino, the system starts working. When I disconnect the power of the arduino and reconnect it, the system stops working. I have never encountered such a problem before. What could be the source of the problem?

In the setup function, I switch the LED on and off 3 times to show that the system has started to work. When I cut the power and give it again, the setup function works because the led flashes. But the functions in the loop function do not work. I would be very happy if you could help me.

blh64 · September 5, 2023, 3:40pm

How are you powering the system? Just through the PC or an external supply? You could insert some Serial.print() statements into your code to see where it hangs. Or does the system typically operate not connected to the PC?

You could also reduce a ton of your code by making an array of arrays rather than securityID_XX arrays. It would also be easier to store these as 32 bit unsigned integers rather an an array of 4 bytes.

Atahan-Uyanik · September 6, 2023, 5:15am

Normally the system will run on battery power. But I am currently powering it with a PC to do the tests. I will try the information you shared. As you mentioned, I don't need the array variable right now, I will remove it and load the code again. The strange thing is that normally the system works when I first load the code. When I disconnect and reconnect the USB, the green LED in the setup function blinks 3 times. After that, the commands in the loop function do not work.

Atahan-Uyanik · September 6, 2023, 5:17am

byte securityID_1[4] = {0x7A, 0xB2, 0x65, 0x9F}; For example, how do I write this array in integars?

paulpaulson · September 6, 2023, 5:25am

Hello Atahan-Uyanik

I assume that you have written the programme by yourself, then it is quite easy to find the error.

There's a trick to figuring out why something isn't working:

Use a logic analyzer to see what happens.
Put Serial.print statements at various places in the code to see the values of variables and determine whether they meet your expectations.

Have a nice day and enjoy coding in C++.

Atahan-Uyanik · September 6, 2023, 9:29am

Hello there;

I noticed something very strange. Normally I was doing my tests with a clone arduino nano. When I used the original arduino nano, the problem disappeared. What could be the reason for this. The code is the same, the circuit schematic is the same, only the arduinos I use are different.

blh64 · September 6, 2023, 3:29pm

uint32_t securityID_1 = 0x7AB2659F;

Then, you just have to compare numbers, not a 4 byte array. You will also have to convert the ID you read into a number as well.

uint32_t id = rfid.uid.uidByte[0] << 24 + rfid.uid.uidByte[1] << 16 + rfid.uid.uidByte[2] << 8 + rfid.uid.uidByte[4];

Now, you can just do

if (id == securityID_1 ) ...

Atahan-Uyanik · September 7, 2023, 7:30am

I got it. This solution easier than i did. Thank you. I will try this and inform you.

Atahan-Uyanik · September 7, 2023, 9:17am

I have a question. I would like to get information about the initialisation commands of the libraries in the setup function. I am sharing the setup function again below;

void setup()
{
  Serial.begin(9600);
  pinMode(BUTTON_PIN, INPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  SPI.begin(); 
  rfid.PCD_Init(); 
  URTCLIB_WIRE.begin();
  SD.begin(SD_SS_PIN);

  //rtc.set(0, 7, 17, 2, 15, 8, 23); //Saati kalibra ederken (Saniye, Dakika, Saat, Gün Adı, Gün Tarihi, Ay, Yıl)
  DATE_TIME();
  for (int i = 0; i < 3; i++)
  {
    digitalWrite(GREEN_LED_PIN, HIGH);
    delay(250);
    digitalWrite(GREEN_LED_PIN, LOW);
    delay(250);
  }
  logTime = false;
  securityCardPressed = false;
  adminLogin = false;

  
  // CREATE_NEW_FILE();
}

I want to know if the libraries in this section are initialised. For example, the system should stay in a loop until the SPI.begin(); command is initialised. For example, can a control mechanism be made like the serial port example?

  Serial.begin(9600);
  while(!Serial);

blh64 · September 7, 2023, 3:36pm

SPI.begin() does not return any value to test for success. Look in the source code of the other libraries to see if their .begin() functions return a value or not. Typically, they will either succeed or fail, not waiting like Serial does.

system · March 5, 2024, 3:36pm

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