Arduino Stack Exchange
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Questions tagged [rfid]

Radio-Frequency Identification. Uses electromagnetic fields to transmit data for identification purposes, such as between a tag and a reader. RFID is the precursor to Near Field Communication (NFC).

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How do I use RFID-RC522 with an Arduino?

I am working on a project for my local Makerspace, we have limited budget so I was hoping to use the RFID-RC522 el'cheap'o RFID/NFC readers on eBay, I received a couple of SPI based boards, they work, however the code examples for them are…
unknowndomain
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RFID/NFC (13.56 MHz), is it possible to send raw bytes and receive response?

I'm trying to implement a card reader (i.e. credit cards) for shopping purposes, and AFAIK those cards are ISO 14443-A compliant (Mifare Classic 1K). I already made an Android app that can send custom APDU to read specific sectors by using raw…
TheAverageGuy
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Issue sharing MISO with multiple RC522 RFID Readers

so for about the last 8.5 hours (almost non-stop) I have been trying to figure out one issue and I have exhausted every search I could possibly think of. I'm building a puzzle that requires 5 RFID readers on the 1 Arduino, but for the sake of…
Jesse Mount
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SPI between Master arduino and Slave arduino

How can I send the string from Slave SPI to Master SPI? I want to write code in Bare Metal. The problem which I am facing is I can't make out what will be my blocking function in Master SPI code when receiving data from slave SPI. As my SPIF bit is…
Kunal
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Can the Adafruit PN532 NFC/RFID be used to read Gen-2 EPC class RFID Tags?

I used Mifare Classic cards on a previous project and it worked brilliantly with the RIFD/NFC shield and Arduino Uno. I came across a Gen 2 EPC Class 1 RFID tags. This tags are long range ones. They use an IC chip called Alien Higgs3. I know that…
user2924
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Using interrrupts with RC522

I have a project using the RC522 RFID module with my Arduino Uno board and miguelbalboa's rfid library. The example code and every other code I find on the internet work pooling the device in order to know if there is a new card present, but I…
Gus Campos
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How can I work with two devices that use the SPI protocol?

I'm working with a project in which I need to use an SD card module and an RFID antenna simultaneously. The devices that I'm using are the MFRC522 and the CATALEX SD Card Adapter. Both have SPI Protocol, and they're using the libraries MFRC522.h and…
Pinedo98
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Is it possible to extend the reach of a PN532 NFC/RFID shield?

I am working off an Arduino Uno with an AdaFruit PN532 NFC/RFID shield. The goal is to have a shoe box, with a false bottom. Under that false bottom would be my prototype, which I hope will be able to detect any MIFARE tag that is in the box, above…
erik
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RFID/NFC Tag get data from wordpress MySQL

I have a local workshop for students to teach them 3D printing/woodworking I want to know if its possible to create RFID/NFC tags using wordpress data from MySQL or HTTP/HTTPS. Web Scenario : I have a wordpress website where I setup a gamefication…
Barbu Daniel
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RFID Code (and setup) works on an UNO but not on the Yun

We're using two RDM6300 RFID readers for this, and the code works when plugged into an UNO, but not when connected to the Yun. We have one of the rfids plugged into the rx pin (0 on the digital side) and the other plugged into pin 2 (same exact way…
soulkingbrook
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How can I get ultra clean dc wall power for my arduino project?

I'm doing an rfid project that requires a read range of at least 5 inches or about 13cm. I'm using a nano with a usb port, a rfid reader from priority 1 design and a large antenna. The problem I'm running in to is that when I power the project from…
badweasel
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Can we use an alternate RFID reader to read HID cards?

I'm working on a project where I need to read the HID RFID cards. Behind the card it shows as HID 0008p and based on the documentation, it looks like it uses a 125 kHz frequency. I tried using different 125 kHz RFID readers, but I was unable to read…
Ram S
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MFRC522 Only working sometimes

/* * -------------------------------------------------------------------------------------------------------------------- * Example sketch/program showing how to read data from a PICC to serial. *…
Devon Freeland
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Connect multiple RFID-RC522 cards?

I have a project that requires 4 different RFID-RC522 readers. The RFID-RC522 has the following pins: SDA SCK MOSI MISO IRQ GND RST 3.3V I have read that the SDA pin is used for selecting the active device, So I'm thinking that these devices can…
Hoytman
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Request for help condensing code and saving memory

I'm building a final project for a class that involves playing an audio file of a wave shield every time I scan an amiibo with an RFID scanner. I'm a pretty new programmer, so I'm not very familiar with the how to best reduce DRAM usage. As such, I…
Ethan Braun
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