I am using an RC522 reader with Arduino UNO. This is the library I am using.
But, when I try a firmware check, in the serial I get this error: Firmware version: 0x12, result: defect or unknown
I checked the connections and they were all correct. My RC522 needs 3.3v and it is connected to the 3.3v pin of my Arduino board. Also, all the pins are soldered.
Here is the code of the firmware check (it came with the library):
/*
* --------------------------------------------------------------------------------------------------------------------
* Example sketch/program to test your firmware.
* --------------------------------------------------------------------------------------------------------------------
* This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
*
* This example test the firmware of your MFRC522 reader module, only known version can be checked. If the test passed
* it do not mean that your module is faultless! Some modules have bad or broken antennas or the PICC is broken.
*
* @author Rotzbua
* @license Released into the public domain.
*
* Typical pin layout used:
* -----------------------------------------------------------------------------------------
* MFRC522 Arduino Arduino Arduino Arduino Arduino
* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
* Signal Pin Pin Pin Pin Pin Pin
* -----------------------------------------------------------------------------------------
* RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
* SPI SS SDA(SS) 10 53 D10 10 10
* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
*/
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
/**
* Check firmware only once at startup
*/
void setup() {
Serial.begin(9600); // Initialize serial communications with the PC
while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522 module
delay(5);
Serial.println(F("*****************************"));
Serial.println(F("MFRC522 Digital self test"));
Serial.println(F("*****************************"));
mfrc522.PCD_DumpVersionToSerial(); // Show version of PCD - MFRC522 Card Reader
Serial.println(F("-----------------------------"));
Serial.println(F("Only known versions supported"));
Serial.println(F("-----------------------------"));
Serial.println(F("Performing test..."));
bool result = mfrc522.PCD_PerformSelfTest(); // perform the test
Serial.println(F("-----------------------------"));
Serial.print(F("Result: "));
if (result)
Serial.println(F("OK"));
else
Serial.println(F("DEFECT or UNKNOWN"));
Serial.println();
}
void loop() {} // nothing to do
The process i followed to install the the library was: Sketch > include library > add .Zip library