Notes

#include <SPI.h>
#include <MFRC522.h>
#include <SD.h>
#include <virtuabotixRTC.h>
virtuabotixRTC Saat(25, 33, 32);
String saatString, tarihString, logg, isim, path, userName;
String veri, cardID;
bool bulundu = false;

#define SS_PIN 5
#define RST_PIN 4
#define SD_CS_PIN 21
#define ONAY_PIN 26
#define RED_PIN 27
#define MLT_PIN 14
#define Status_PIN 16

/*USER IDs*/

MFRC522 mfrc522(SS_PIN, RST_PIN);
File myLog;
File myUser;

void setup() {

pinMode(ONAY_PIN, OUTPUT);
pinMode(RED_PIN, OUTPUT);
pinMode(MLT_PIN, OUTPUT);
digitalWrite(RED_PIN, LOW);
digitalWrite(ONAY_PIN, LOW);
digitalWrite(MLT_PIN, 1);
delay(100);
digitalWrite(MLT_PIN, 0);
Serial.begin(115200);
SPI.begin();



if (!SD.begin(SD_CS_PIN)) {
Serial.println("SD kart okuyucusu bağlantısı başarısız!");
return;
}
Serial.println("SD kart okuyucusu bağlandı.");
mfrc522.PCD_Init();
}

void loop() {
if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) {
String cardID = "";

for (byte i = 0; i < mfrc522.uid.size; i++) {

cardID += String(mfrc522.uid.uidByte[i] < 0x10 ? "0" : "");

cardID += String(mfrc522.uid.uidByte[i], HEX);

if (i < mfrc522.uid.size - 1) {
cardID += " ";
}
}
Serial.println("Kart ID: " + cardID);


String path = String("/users/") + String(cardID) + String(".txt");
myUser = SD.open(path);
if (myUser) {
userName = String(myUser.readStringUntil('n'));
Serial.println(userName);
logtut(userName, cardID);
onay();
myUser.close();
ESP.restart();
}
else {
Serial.println("Kullanıcı Bulunamadı");
logtut("KAYITDISI", cardID);
red();
myUser.close();
ESP.restart();
}
}

}




String saatial() {

String hour, minute, seconds;

Saat.updateTime();

if (Saat.hours < 10) {
hour = "0" + String(Saat.hours);
} else {
hour = String(Saat.hours);
}

if (Saat.minutes < 10) {
minute = "0" + String(Saat.minutes);
} else {
minute = String(Saat.minutes);
}

if (Saat.seconds < 10) {
seconds = "0" + String(Saat.seconds);
} else {
seconds = String(Saat.seconds);
}
saatString = String(hour) + String(":") + String(minute) + String(":") + String(seconds);
return saatString;
}

String tarihial() {

String day, mon;

Saat.updateTime();

if (Saat.dayofmonth < 10) {
day = "0" + String(Saat.dayofmonth);
} else {
day = String(Saat.dayofmonth);
}

if (Saat.month < 10) {
mon = "0" + String(Saat.month);
} else {
mon = String(Saat.month);
}

tarihString = String(day) + String(".") + String(mon) + String(".") + String(Saat.year);
return tarihString;
}

void onay() {
Serial.print("ONAY ");
Serial.println(saatial());
digitalWrite(ONAY_PIN, HIGH);
delay(3000);
digitalWrite(ONAY_PIN, LOW);
}

void red() {
Serial.print("RED ");
Serial.println(saatial());
digitalWrite(RED_PIN, HIGH);
delay(200);
digitalWrite(RED_PIN, LOW);
}

void logtut(String isim, String id) {
String path = String("/log/") + String(tarihial()) + String(".txt");
myLog = SD.open( path , FILE_APPEND);
if (myLog) {
Serial.print("Log tutuluyor");
myLog.print(saatial());
myLog.print(",");
myLog.print(isim);
myLog.print(",");
myLog.println(id);
myLog.close();
Serial.println("ok");
digitalWrite(MLT_PIN, 1);
delay(50);
digitalWrite(MLT_PIN, 0);



} else {
// if the file didn't open, print an error:
Serial.println("hata oluştu");
}
}