ACR122U | This library is used to read , write Mifare Classic | Android library

I would like to set an NDEF message on my website if it is opened from android chrome and read it with an NFC Reader using nfcpy.

According to https://developer.mozilla.org/en-US/docs/Web/API/NDEFMessage/NDEFMessage I think I should be able to do this.

My page looks like this:

I am trying to use this plugin in my Ionic 5 app: https://www.npmjs.com/package/cordova-plugin-k-nfc-acr122u

I installed plugin using cordova plugin add cordova-plugin-k-nfc-acr122u and i i dont now like use it. Plugin declares :

enter image description here

and i try use connect function but it don't work. enter image description here

package.json

Please help, thx.

I'm writing an application in c# .net that needs to communicate with nfc reader (ACR122U or in built windows WUDC). The reader will send/receive data to wristband that behaves like type 4 tag. I'm using pcsc sharp library for this: https://github.com/danm-de/pcsc-sharp. Communication is over NDEF protocol with single text record, which can be used to obtain data from wristband. Text record format is G:{nameOfParameter}. For example G:ID, G:MAC.

I'm struggling for few days with sending write message to the wristband. The command I was able to make work is APDU ReadBinary Command:

I'm writing C# application to emulate NFC tag via ACR122U, which uses PN532 internally. I want Android to read simple URI NDEF Tag.

I'm able to communicate with Android using NFC Forum Type 4 Tag protocol, Android detects the tag, but is not able to read the NDEF file - checked with NFC Tools app.

The communication looks like this:

I have LibNFC working from the Linux terminal recognising my ACR122U Reader, and I wanted to know if there was a method for it to work through Chrome on a Linux Desktop as it is really similar to Android Support, with all the NFC device handling done by libnfc and the browser just has to know about this library instead of every type usb or other device than can do NFC.

I have tried using the WebNFC API to connect it :

I'm trying to implement the functionality for emulating a Mifare One (1K/S50, ISO14443A) chip to be able to use a phone with NFC capability instead of a physical Mifare card or, if possible sending only the data to the reader.

I have this type of reader/writer: https://www.evelta.com/er302-high-frequency-nfc-writer-usb/

After looking around on forums, stackoverflow questions I found this article to be the best example:

https://medium.com/the-almanac/how-to-build-a-simple-smart-card-emulator-reader-for-android-7975fae4040f

I implemented the HCE part, run the program, and the reader beleives my phone is a Mifare chip, so far so good.

My problems:

• No matter what "standard" Authentication key I tried to use...it gives me Auth error. I read this question about Auth: Authentication failure for Mifare 1K NFC tag using ACR122U NFC reader, it works on a physical Mifare card...but I don't know how to set or get to know the keys for the emulated one.

• I don't get why this example emulates that exact Mifare chip type...even breakpoints don't work in the APDUService, but the reader detecting a Mifare cheap somehow.

After reading about it, I get I can't 100% emulate a physical card, so I have to send all the data I want in my APDU response with the service somehow (I beleive it's the transreceive part).

However I can't even authenticate.

I tried to look for other possible solutions:

• AndroidBeam: Android - Android p2p...sounds simple, relatively high-level API, but it's being deprecated, moreover it's not guaranted that the reader will even use Android...it might be a 'simple' USB reader hardware like the one I use.

• SecureElement: Ironically...it seems to be the most recommended, I read that 'yes, it's possible for mifare' and things like that, yet I couldn't find a good example of it and the official Google docs don't have any good example. I read that it's for "ISO/IEC 7816-4", but Mifare 1K is ISO14443A, so I'm a bit sceptic about this API.

• "Simply" sending the data to the reader: If I could just simply "push" the data out to the reader when it's reading the phone without complicating the matter or emulating anything...it would be great but I don't know if it's even possible. This whole NFC topic seems to be more and more complex.

So alltogether I only need to do one thing: taking the data and send it to the reader.

I realized it's a fairy tale like illusion to beleive it's as simple as it sounds, still, I hope there is a way to do it.

If I could send the data in it's own, without emulating Mifare or anything...after all what matters is that the data on the card, not the type of the chip, the more simple the solution will be, the better.

Sorry for possible English grammar mistakes.

I am trying to use the smartcardio library in Java (JDK 8, NetBeans 7.4, Windows 10). I have tried many other libraries with no success.

The card reader (ACS ACR122U) came with an SDK CDROM but the necessary .DLL is not on the CD so I cannot use the ACS library.

Since my NFC device uses an EEPROM that is not supported by the nfctools library I cannot use nfctools.

My code is as follows:

I am building a Windows/Java program (using javax.smartcardio) to communicate with Jewel/Topaz512 tags (from Innovision/Broadcom) using an ACR122U device (with a PN532 NFC Controller chip inside).

I implemented the Topaz512 protocol (from this data sheet) but only half of my commands are working.

• Some commands that work: RID, RALL, READ, WRITE-NE, RSEG
• Some commands that don't work: WRITE-E, READ8, WRITE-E8, WRITE-NE8

For instance, here is what I get when I send a WRITE-NO-ERASE command:

Command: FF:00:00:00:0C:D4:40:01:1A:7F:42:38:01:9A:00:17:E8

Where:

• D4:40:01 is the InDataExchange command,
• 1A:7F:42 is the WRITE-NO-ERASE command (value: 0x42, block 0x0F, byte 7),
• 38:01:9A:00 is the 4-bytes tag UID,
• 17:E8 is the CRC.

Response: D5:41:00:42:90:00

Here the response is correct: 0x42. The status byte (0x00) informs that everything went well.

And here is what I get when I send a WRITE-WITH-ERASE command:

Command: FF:00:00:00:0C:D4:40:01:53:7F:42:38:01:9A:00:28:6E

Where:

• D4:40:01 is the InDataExchange command,
• 53:7F:42 is the WRITE-WITH-ERASE command (value: 0x42, block 0x0F, byte 7),
• 38:01:9A:00 is the 4-bytes tag UID,
• 28:6E is the CRC.

Response: D5:41:01:90:00

Here, the status byte (0x01) informs of a timeout detected by the PN532. (From the PN532 documentation (p67): "Time Out, the target has not answered - 0x01")

Also when I remove the PN532 timeouts (with FF:00:00:00:06:D4:32:02:00:00:00) non-working commands do not respond D5:41:01:90:00, but wait longer, then I get no response.

I just tried to execute the commands using gscriptor (from the pcsc-tools suite) and I got the same behavior. Here are my results:

The script: