RFID reader question

[FutureEngineer]

Good morning,

I am working on a project that uses an Adafruit RFID reader with an Arduino UNO. When I test readMifareClassic from the Adafruit PN532 library, it works, and it displays the address of the card. However, when I used the same code in an Arduino sketch, the reader did not identify the cards. I attached an image that shows the result.

The code is added below. Can you assist, please?

Code: Select all

#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
#define PN532_IRQ   (2)
#define PN532_RESET (3)  // Not connected by default on the NFC Shield
Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET);


void setup(void) {
  Serial.begin(9600);
  nfc.begin();
  uint32_t versiondata = nfc.getFirmwareVersion();
  if (! versiondata) {
    Serial.print("Didn't find PN53x board");
    while (1); // halt
  }
  // Got ok data, print it out!
  Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX); 
  Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC); 
  Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
  nfc.SAMConfig();
  Serial.println("Waiting for an ISO14443A Card ...");
  

   
}


void loop() {  
  

  
  
   uint8_t success;
   uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };  // Buffer to store the returned UID
   uint8_t uidLength;                        // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
   success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
  
  if (success) {
    Serial.println("Found an ISO14443A card");
    Serial.print("  UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
    Serial.print("  UID Value: ");
    nfc.PrintHex(uid, uidLength);     
    Serial.println("");
   
          
  /////// Use the address information to save the crediet value 
   if( uid[0]==12 && uid[1]==209 && uid[2]==114 && uid[3]==59 ) 
     { 
       Serial.println("Card #1: Ahmed ");
     }
    
    if( uid[0]==164 && uid[1]==61 && uid[2]==78 && uid[3]==18 ) 
      { 
        Serial.println("Card #2: Latifa ");
        
      }
     
     if( uid[0]==131 && uid[1]==130 && uid[2]==27 && uid[3]==188 ) 
       { 
         Serial.println("Card #3: Amna ");
       }
    
      if( uid[0]==243 && uid[1]==102 && uid[2]==29 && uid[3]==188 ) 
       { 
         Serial.println("Card #4: Mayasa ");
         
       }
    
      if( uid[0]==51 && uid[1]==13 && uid[2]==26 && uid[3]==188 ) 
        { 
          Serial.println("Card #5: Sara ");
 
        }
    
       if( uid[0]==3 && uid[1]==194 && uid[2]==27 && uid[3]==188 ) 
         { 
           Serial.println("Card #6: Omer ");
        }
    

}

[Franklin97355]

Where is the "Seems to be.........." Print statement coming from? What are you expecting the output to be?

[FutureEngineer]

I need to display different messages for each card

[FutureEngineer]

Good morning,

Can you please check my code for any errors?
I used the code from readMifareClassic from the Adafruit-PN532 library.

Thanks in advacne for your support

[Franklin97355]

What is the output when you run your code?

[FutureEngineer]

Good morning,

It's working now, I added an image.
I have one additional question, I need to connect parallel LCD with Arduino to display the name of the card owner.I want to ask which pins I can not use. I mean the pins used by the RFID reader that I can not use to connect the parallel LCD.

Thanks in advance