🐛 | BUG SUMMARY Replacing pirc with mfrc

[Sanduur]

pirc522 is not working in Reader.py

I installed this github on a freshly clean Raspian Environment, but for me, the code in the Reader.py.experimental file is not working. I have the blue RFID-RC522 module, connected to GPIO. Here is the original Code:

class Mfrc522Reader(object): def init(self): import pirc522 self.device = pirc522.RFID()

def readCard(self):
    # Scan for cards
    self.device.wait_for_tag()
    (error, tag_type) = self.device.request()

    if not error:
        logger.info("Card detected.")
        # Perform anti-collision detection to find card uid
        (error, uid) = self.device.anticoll()
        if not error:
            card_id = ''.join((str(x) for x in uid))
            logger.info(card_id)
            return card_id
    logger.debug("No Device ID found.")
    return None

@staticmethod
def cleanup():
    GPIO.cleanup()

However I found a Tutorial (Sorry, its german language: https://devdrik.de/pi-mit-rfid-rc522/) and I found out that my Module is working fine.

Unfortunately I am not a really good python developer but in 2023 we have access to chatGPT :) I asked to convert the class to work with SimpleMFRC522 and chatGPT entered this code for me (which is working well):

class Mfrc522Reader(object): def init(self): from mfrc522 import SimpleMFRC522 self.device = SimpleMFRC522()

def readCard(self):
    try:
        # Scan for cards
        (uid, text) = self.device.read()

        if uid:
            card_id = str(uid)
            logger.info(card_id)
            return card_id
    except Exception as e:
        logger.error("Error reading card: {}".format(str(e)))
        logger.error("uid: {}".format(uid))

    logger.debug("No card found.")
    return None

@staticmethod
def cleanup():
    GPIO.cleanup()

Just wanted to share because some others may have the same issue. Feel free to import this code in the github, I love this project!! I use the following version:

$ uname -r; python -V 6.1.21-v8+ Python 3.9.2

[AlvinSchiller]

Hi, just for clarification: do you have the IRQ pin connected to Pin 18/GPIO 24? https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki/Wiring_for_RC522_card_reader

This is needed in this project and differs from your linked tutorial.

[Sanduur]

I did NOT connect Pin 18 / GPIO 24... Even if "You have to wire the IRQ Pin from RC522 to Raspberry Pin 18/GPIO 24" in the manual is written in bold.

Thank you very much! Now it works as designed

[AlvinSchiller]

So this can be closed, right?

[Sanduur]

Yes. Thank you very much.