Has anyone worked with this module on raspberry pi?!
I just tried i2c connection, the raspberry pi is able to detect the device, but still I don't know which library will work. Please can someone help?!

It says "the tag is not NDEF Formatted"....so should it be NDEF formatted to use it with the module?

When I try to write on the mifare classic......the serial monitor shows....block authentication failed for 4..what to do?

CODE:

#include <Wire.h>
#include <PN532_I2C.h>
#include <PN532.h>   // The following files are included in the libraries Installed
#include <NfcAdapter.h>

PN532_I2C pn532_i2c(Wire);
NfcAdapter nfc = NfcAdapter(pn532_i2c);  // Indicates the Shield you are using

void setup() {
    Serial.begin(9600);
    Serial.println("NFC Tag Writer"); // Serial Monitor Message
    nfc.begin();
}

void loop() {
    Serial.println("\nPlace an NFC Tag that you want to Record these Messages on!"); // Command for the Serial Monitor
    if (nfc.tagPresent()) {
        NdefMessage message = NdefMessage();
        message.addTextRecord("Abc"); // Text Message you want to Record
                boolean success = nfc.write(message);
        if (success) {
            Serial.println("Good Job, now read it with your phone!"); // if it works you will see this message 
        } else {
            Serial.println("Write failed"); // If the the rewrite failed you will see this message
        }
    }
    delay(10000);
}
Yes you can wrap the code with 3 backticks.

One more thing...the module is not reading my nfc tags having Topaz 512 chip...can u please tell me the module is compatible with which nfc tags other than mifare?

@Lokki Thanks for your help...now its working

@Lokki
http://s33.postimg.org/l4ynraf7j/IMG_20160531_WA0004.jpg

No change..still no success....same error

That's also not working...same error..!!

#if 0
#include <SPI.h>
#include <PN532_SPI.h>
#include <PN532.h>
#include <NfcAdapter.h>

PN532_SPI pn532spi(SPI, 10);
NfcAdapter nfc = NfcAdapter(pn532spi);
#else

#include <Wire.h>
#include <PN532_I2C.h>
#include <PN532.h>
#include <NfcAdapter.h>

PN532_I2C pn532_i2c(Wire);
NfcAdapter nfc = NfcAdapter(pn532_i2c);
#endif

void setup(void) {
    Serial.begin(9600);
    Serial.println("NDEF Reader");
    nfc.begin();
}

void loop(void) {
    Serial.println("\nScan a NFC tag\n");
    if (nfc.tagPresent())
    {
        NfcTag tag = nfc.read();
        tag.print();
    }
    delay(5000);
}

Still can u send me any of your code..!?