How to get the time when Rfid leave the reader using RTC

Using Arduino Project Guidance
1

Hello guys, I'm currently working on an RFID project, I have an RTC module, I need to get the times when the RFID MFRC522 detects that a tag is present, and the time when I get the tag of the reader.

2

show sketch

3

This one for the RTC

#include <ThreeWire.h>  
#include <RtcDS1302.h>

ThreeWire myWire(27,26,25); // IO, SCLK, CE
RtcDS1302<ThreeWire> Rtc(myWire);
String currentTime;
void setup () 
{
    Serial.begin(9600);
    Rtc.Begin();
}

void loop () 
{
    RtcDateTime now = Rtc.GetDateTime();
    printDateTime(now);
    Serial.println();

    if (!now.IsValid())
    {
        // Common Causes:
        //    1) the battery on the device is low or even missing and the power line was disconnected
        Serial.println("RTC lost confidence in the DateTime!");
    }

    delay(2000); // ten seconds
}

#define countof(a) (sizeof(a) / sizeof(a[0]))

void printDateTime(const RtcDateTime& dt)
{
    char datestring[20];
    snprintf_P(datestring, 
            countof(datestring),
            PSTR("%02u:%02u:%02u"),
            dt.Hour(),
            dt.Minute(),
            dt.Second() );
    Serial.print(datestring);
}
4

and this for reading the tag

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

#define RST_PIN         22           // Configurable, see typical pin layout above
#define SS_PIN          5          // Configurable, see typical pin layout above

MFRC522 mfrc522(SS_PIN, RST_PIN);   // Create MFRC522 instance
MFRC522::StatusCode status;
MFRC522::MIFARE_Key key;

byte buffer1[18];
byte buffer2[18];
byte buffer3[18];
String getTaskTypeID;
//byte len = sizeof(buffer);
byte len = 34;

//*****************************************************************************************//
void setup() {
  Serial.begin(9600);                                           // Initialize serial communications with the PC
  SPI.begin();                                                  // Init SPI bus
  mfrc522.PCD_Init();                                           // Init MFRC522 card
}

void loop() {
  readTask();
}

 void readTask(){
//*****************************************************************************************//
  // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
  for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;

  //-------------------------------------------

  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
  if ( ! mfrc522.PICC_IsNewCardPresent()) {
    return;
  }

  // Select one of the cards
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return;
  }


  Serial.println(F("**Card Detected:**"));

  //------------------------------------------- GET TASK ID
  Serial.print(F("Task ID: "));
  readBlock(buffer1,4);
  //getTaskId = String((char*)buffer1);
  //Serial.println(getTaskId);
  //---------------------------------------- GET TASK TYPE ID
  Serial.print(F("\nTask Type ID: "));
  readBlock(buffer2,5);
  getTaskTypeID = String((char*)buffer2);
  //Serial.println(getTaskName);
  //----------------------------------------
  //---------------------------------------- GET TASK DATA: NB TOURS
  Serial.print(F("\nTask Delai: "));
  readBlock(buffer3,6);
  //getTaskDelai = String((char*)buffer3);
  //Serial.println(getTaskDelai);
  //----------------------------------------
  Serial.println(F("\n**End Reading**\n"));
  delay(1000); //change value if you want to read cards faster
  
  mfrc522.PICC_HaltA();
  mfrc522.PCD_StopCrypto1();
}



void readBlock(byte *buffer,byte block){
  status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, block, &key, &(mfrc522.uid)); //line 834 of MFRC522.cpp file
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Authentication failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  status = mfrc522.MIFARE_Read(block, buffer, &len);
  if (status != MFRC522::STATUS_OK) {
    Serial.print(F("Reading failed: "));
    Serial.println(mfrc522.GetStatusCodeName(status));
    return;
  }

  //PRINT ...
  for (uint8_t i = 0; i < 16; i++){
      Serial.write(buffer[i]);      
  
  }
}
5

So you have 2 pieces of code that someone else has written, and your assignment is to combine them?

6

I got this code from the library, I'm trying to combine them and get the time when I put the tag on the reader and the time the tag leave the reader

7

So you've tried?... great! Please post your attempt.

8

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