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Questions tagged [acr122]

The ACS ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on the 13.56 MHz Contactless (RFID) Technology.

The ACS ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on the 13.56 MHz Contactless (RFID) Technology. Compliant with the ISO/IEC18092 standard for Near Field Communication (NFC), it supports not only Mifare® and ISO 14443 A and B cards but also all four types of NFC tags.

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Raspberry cant communicate with ACR122U

I dont know why appear this exception in the execution javax.smartcardio.CardException: list() failed at sun.security.smartcardio.PCSCTerminals.list(PCSCTerminals.java:126) at…
Georgevik
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Cannot connect Android HCE using javax.smartcardio.CardTerminal connect() method

So right now I'm building a simple app to emulate a smartcard using Android HCE (Host-based Card Emulation). The app only returns {90,00} byte array for every APDU command it receives. Here is the code: public class MyHostApduService extends…
user1749623
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Can't authenticate NFC tag having 7 byte UID ACR122U

I have got two type of Mifare Classic tags. One have UID of 4 byte and other one have 7 byte. I am trying to read the block of both. I am successful in reading the block of the tag having 4 byte UID but failed to authenticate in case of 7 byte UID.…
user2578909
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How to implement Event Based triggering instead of Timer

I have recently implemented the Communication with ACR122 using the winscard library. I have used a timer to invoke all the relavant API Calls like 1. SCardEstablishContext 2. SCardListReaders etc to get the status of reader I have kept the interval…
hellowahab
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How read/write tag with ACR122U connected to a Android tablet

I'm using an ACR122U connected to my Android Tablet which hasn't a NFC antenna, so I connect via USB the ACR. It means that I can't use the standard library of Android to use that device. The ACS company, that provides the ACR, offers their own ACS…
Georgevik
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ACR122U emulate JIS 9319-4 tag instead of ISO 14443-4 tag when keep phone on the reader

I have a strange problem. When i emulate a tag with the ACR122U it normally emulate a ISO 14443-4 (NfcA) tag. This always works in the following sequence: Start emulating with tgInitAsTarget Phone on the reader Transaction succesfull Phone off the…
S.Pols
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ACR122U Sending Direct commands returning -2 and Segmentation fault

I am trying to send a direct command to the ACR122U reader. The simplest one I have is: FF 00 48 00 00 This command is suppose to return the Firmware version. Using the ACR122U tool I can see that it works fine. I am trying to use…
AntonioCS
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Connecting to ACR122 on centos

I have an ACR122 and I am trying to connect to it using lib-nfc. (is this the correct step?) I don't have much knowledge regarding NFC (any links for beginners in C for linux are appreciated) I have lib-nfc on my machine (centos 6.5 64bit) and if I…
AntonioCS
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how to read and write an unknown smartcard?

I bought a number of smart-cards which I believe are Gemalto products. Now I have these four ATRs (using ACR38 and ACR122U reader): 3B 8F 80 01 80 31 80 65 B0 85 02 02 ED 12 0F FF FF FF FF 9F 3B 7F 94 00 00 80 31 80 65 B0 85 02 02 ED 12 0F FF 82 90…
Ebrahim Ghasemi
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Frequent Disconnection ACR122U NFC Reader

When I put SIII (Android 4.3) on ACR122U NFC reader the LED keeps blinking green. When I put Samsung S4 (Android 4.3) LED turns green till the time phone is on the reader. In both the cases NFC is turned on and device is in unlocked state. This…
Sunita
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ACR122 NFC as external Nfc adapter

I want to read passport and id card data using ACR 122 on an android device (Orange Pi LTS 3) that does not have a built-in nfc reader. My problem is how can i use the ACR122 adapter like phones's own nfc adapter with jmrtd and scuba libraries.…
onurbilke
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How HCE work with acr 122u nfc reader, When I am trying to work with below example code It is working like reader in android and ios

The code below is working when I emulate from android and iphone acts as a reader but not working with acr 122u usb nfc reader Here I am posting the work around, any suggestions or source code would be really helpful. KHostApduService package…
Padmaja Rani
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QtNFC neard Error in dmesg: "invalid frame" "Poll complete error -5"

I'm trying to communicate with an ACR122U nfc reader using Qt 5.15.2 and neard 0.18 on Ubuntu 22.04 by running the code below but nothing happen when presenting a tag. Slots never get called and no error is printed. NFCHandler::NFCHandler(QObject…
Eron
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Get UID tag in WebUSB in node - Reader ACR122u

I am building a node application, which should read information from an NFC reader connected through USB. I´m able to power up the device, I can read ATR, but unable to read UID of a card, when the card is connected. I´m starting with node-usb and…
Jarda Hrbacek
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ACR122U Reading Chip card UID status

I use an NFC reader / writer ACR122U Creating program in c # with ACR122u and WINSCARD.DLL and this library https://github.com/h4kbas/nfc-reader I would need to know if it is possible for the reader to find out whether the block with the UID of the…
Dominik Ganger Klodner
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