RFID rc522 modul

Projects Networking, Protocols, and Devices
1

Help i tried using the rfid modul but i cant get it working i tried 4 codes and nothing is working
it also could be my Module, pls help!

here is my code: (some things are in german ignore them its the help thingis, to better understand the code)

// RFID-Bibiothek hinzufügen

#include "MFRC522.h"

// Anschlüsse definieren

#define SDA 10

#define RST 9

// LEDs

#define grueneLED 6

#define gelbeLED 7

// Zustand der LEDs false = beim Start ausgeschaltet

bool StatusgelbeLED = false;

bool StatusgrueneLED = false;

// RFID-Empfänger benennen, Pins zuordnen

MFRC522 mfrc522(SDA, RST);

void setup()

{

  Serial.begin(9600);

  SPI.begin();

  // Initialisierung des RFID-Empfängers

  mfrc522.PCD_Init();

  pinMode(gelbeLED, OUTPUT);

  pinMode(grueneLED, OUTPUT);

}

void loop()

{

  String WertDEZ;

  // Wenn keine Karte in Reichweite ist ..

  if (!mfrc522.PICC_IsNewCardPresent())

  {

    // .. wird die Abfrage wiederholt.

    return;

  }

  // Wenn kein RFID-Sender ausgewählt wurde ..

  if (!mfrc522.PICC_ReadCardSerial())

  {

    // .. wird die Abfrage wiederholt.

    return;

  }

  Serial.println("Karte entdeckt!");

  // Dezimal-Wert in Strings schreiben

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

  {

    WertDEZ = WertDEZ + String(mfrc522.uid.uidByte[i], DEC) + " ";

  }

  // trim() -> Leerzeichen am Ende des Strings entfernen

  WertDEZ.trim();

  // Kennung dezimal anzeigen

  Serial.println("Dezimalwert: " + WertDEZ);

  // gelbe LED schalten

  if (WertDEZ == "67 217 130 21")

  {

    // Status ändern an/aus

    StatusgelbeLED = !StatusgelbeLED;

    digitalWrite(gelbeLED, StatusgelbeLED);

  }

  // grüne LED schalten

  if (WertDEZ == "3 208 23 23")

  {

    // Status ändern

    StatusgrueneLED = !StatusgrueneLED;

    digitalWrite(grueneLED, StatusgrueneLED);

  }

  // Wartezeit verhindert, dass die Karte nur einmal erkannt wird

  delay(1000);

}
2

Welcome to the forum

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3

Please properly edit your code to be inside a code block.

Can you additionally show a schematic diagram of you wired everything up? Or a photo of it?

Have you tried known good firmwares like

https://github.com/miguelbalboa/rfid/blob/master/examples/firmware_check/firmware_check.ino

to see if your module is being detected at all?

4

i dont have the programm to do a diagram i am new

5

You can equally describe it in plain text what your pin connections are.

6

Draw the circuit diagram using pencil and paper. Label all devices and the pins that you use. Take a photograph of the circuit and paste it into a reply here

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7

i tried it and semms like it is broken i can reclaim it if that is the right word for that, anyways thank you for your fast help.

8

Not everything requires a program to do. Schematics drawn on paper with pen or pencil and then photographed have been done for decades.