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).

56 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
2
votes
0answers
619 views

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) ...
2
votes
0answers
2k views

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 ...
2
votes
0answers
1k views

Using Johnny-five API with RFID Controller Shield

Is it possible to use the Adafruit PN532 NFC/RFID Controller Shield with the Johnny Five API? I've searched the depths of google and I'm unable to find anything so far. If it is possible, how can I go ...
2
votes
0answers
1k views

Hub RFID Arduino + WIFI

I will start an Arduino project and its main requirement is that some RFID readers (at most 6 readers) be connected and controled by the arduino board. I do not have a strong background in ...
1
vote
0answers
1k views

NFC PN532 SPI - Error: Timeout when waiting for ACK

I've been struggling to get the PN532 module working over SPI with an Arduino Uno. I have the wires connected as follows: SCK -> 13 MISO -> 12 MOSI -> 11 SS -> 10 VCC -> 5V ...
1
vote
0answers
744 views

Make RFID Tag as a variable

I want to make RFID Tag as a variable, and push it to the web server. But I struggle to do the Serial.read function. Any solutions? Here is my code #include <ESP8266WiFi.h> #include <SPI....
1
vote
0answers
3k views

Arduino RFID Mifare Classic dump info

I have my Arduino uno setup with RC522 reader. I am able to dump the data that is held on my test card supplied with the reader but I wish to read the data blocks held within another card I have. The ...
1
vote
0answers
744 views

RFID working with interrupts

I recently created a rfid project with the sensor rfid rc522. I used the instructions mentioned by this site and works perfectly. However, I intend this project to be battery supplied and I want to ...
1
vote
0answers
2k views

How to write an integer value to an RFID tag?

I'm working on a project in which two Arduinos are to be used, each Arduino is connected to an RFID reader. First RFID reader should write an integer value to the tag detected whereas the second RFID ...
1
vote
2answers
336 views

RFID stops working when I place the servo

I've successfully implemented Door Unlock system described in this tutorial. At first I used Arduino Uno and RFID RC522 Reader and MG90S Micro servo. When I used Arduino Uno with Arduino Pro Micro ...
1
vote
0answers
223 views

Cannot read NTAG203 with MFRC522

I tried regular RFID tags and It works but when I tried NTAG203 it won't detect. P.S. I used the code "dump_data" example of MFRC library.
1
vote
0answers
734 views

Help reading a 125khz FSK RFID

Reddit doesn't seem to be much help, so I'm posting here as well. I'm try to read (what I think is) an HID Duoprox II 125kHz FSK RFID and am having a bit of trouble. I'm using an Arduino nano and am ...
1
vote
0answers
1k views

Arduino code issue (using Bluetooth and Rfid technology)

I am building a device that communicates with my Android phone. I know that my App works but my Arduino code seems to have a problem. So I have made a smaller programm and everything works fine there. ...
1
vote
0answers
124 views

RFID library issue

I am having some strange issue. I am using Linkit One board, which is a based on Arduino. I am using rfid reader RC522 which is cheapest and most common. I cant get its official library get it ...
1
vote
1answer
995 views

Emulate RFID Tag

I just got my RFID-RC522 Reader and was wondering one thing. Can i Use an RFID Reader to emulate an RFID Tag, so that if i have another reader it will detect the other one as a card and transfer data. ...
0
votes
0answers
34 views

4 RFID with Arduino Uno / add or remove card with master card /

i am new in coding for arduino. I need some help with the project i'm working on. my project is a object tracking by using the rfid rc522 for inventory system. so i need to have multi reader in this ...
0
votes
0answers
21 views

RFID RC522 Serial Communication converting problem

I am new to the RFID Scene and Serial communication as well. So I am trying to use the RC522 RFID module and I wrote in block 22 - 0x36 which is 6. I want to write a code where I take whatever is in ...
0
votes
1answer
59 views

Arduino Project Interrupt Error?

I have a project to be made i.e. water Billing System using RFID(Mfrc522) on Arduino NANO. There is one difficulty that I haven't been able to overcome. I hope someone could help me out. Project flow: ...
0
votes
0answers
15 views

Does MFRC522 module read all 13.56 MHz RFID tags?

Hello everyone. Does MFRC522 module read all 13.56 MHz RFID tags? Or there are different types of the 13.56 MHz tags that the MFRC522 module reads only one type of them?
0
votes
0answers
11 views

I am trying to rewrite an RFID with a MEGA2560 and a RFID-RC522

I have been trying to rewrite an RFID tag so it is the same as my other one. I have code that will read both separately but I cannot find any already written for the MEGA2560 that will work for me. ...
0
votes
0answers
12 views

RFID reader(125kHz) switching between antennas

My arduino application wants multiple separate cards in multiple separate (nearby) locations to be readable at roughly the same time. I am using a RDM6300 module, with a multiplexer to switch between ...
0
votes
2answers
108 views

multiple RC522 RFID on arduino yun

I was trying for one month to make multiple RC522 rfid readers work together on SPI on an arduino yun, one works fine, but if I plug 4, each with a specific slave select, only one, sometimes 2, ...
0
votes
0answers
22 views

Is it possible to modify the animal tags (EM4305) with any module that works with Arduino? 134,2Khz

i have a lot of tags (Animal tags rounded yellow) EM4305, this have 15 spaces of memory and i need change ID writed, currently i'm using this module but it did not can possible write on tag, exist a ...
0
votes
0answers
24 views

Changing user access byte of RFID card caused breaking the sector

I wanted to write 0xBC to the unused byte 9 of trailer block 63. What I did: Opened ReadAndWrite example of MFRC522 library Change these lines: These: byte sector = 15; byte blockAddr =...
0
votes
1answer
164 views

NodeMCU unable to communicate with MFRC522 RFID reader

I am creating a project that will read the RFID card or tag data, store that into a mysql database and display the data via PHP. I am using NodeMCU, RC522 RFID reader and Ardunio IDE to do that. ...
0
votes
2answers
80 views

How to make a dynamic menu with a sub-menu ( Arduino mega or Arduino Uno)

I have an arduino mega with a LCD shield (from keyestudio KS2056). I am trying to create a menu with a submenu that would have addable and removable strings based on inputs from a RFID scanner(addable)...
0
votes
0answers
25 views

Improper functioning of Node mcu when connected to source other than PC

I connected EM18 rfid reader to NodeMCU to read rfid card data. It showed card number very quickly and consistently till it was connected to my PC's USB. But when I connected it to 5v power source (...
0
votes
0answers
19 views

MFRC522 randomly works

I read several thread and discussion about MFRC522 issues, but I didn't found a solution for my problem. I have two MFRC522 reader connected to my Arduino Uno. I send commands to the Serial Port, and ...
0
votes
0answers
42 views

Is it possible to write URLs to RFID tags with the RC522? If so, how?

I've been trying to research to answer this question for a long time, but could not figure out the answer. I know how to code like bytes of information, but not URLs. More specifically, when you code ...
0
votes
0answers
28 views

MIFARE CLASSIC 1K anti-collision

I am using this code to read card. https://wiki.keyestudio.com/Ks0067_keyestudio_RC522_RFID_Module_for_Arduino I have only one card, so I can't test anticollision. Can someone explain me how does it ...
0
votes
0answers
45 views

RFID-RC522 not working with Arduino/Genuino Micro

I recently bought an RFID kit from my local electronics store, this one here to be exact. I have been trying to follow this GitHub library, however, upon hooking it up, launching the DumpInfo ...
0
votes
0answers
29 views

Can the following materials be used to power up an attendance based sensor?

arduino uno, esp8266, rfid module rc522, sd card module, real time clock module, buzzer, led light and battery holder. I was planning to build a sensor that monitors attendance with the use of and ...
0
votes
2answers
190 views

Garage Door Opener RFID failing after a period

I've been building an add on to my garage door opener that will allow it to be opened from the outside with a valid RFID token or from inside using push buttons. This works as expected when first ...
0
votes
0answers
424 views

How to Insert Data in Arduino's Direct Mysql

As inserted in a Arduino Mysql Direct Tablela I'm new to Arduino and would like to know how to do something in the code to make a copy in the database This code to pass the RFID and authorized ...
0
votes
0answers
97 views

How to use sparkfun rfid qwiic reader

Project(skip to here if you don't care): I wanna use the rfid tags as products that i send to a mobile app and from there a suite of different applications. I succeded with a mfrc522 but only for 3cm ...
0
votes
0answers
72 views

Problem in interfacing EM18 reader with Arduino Mega

When we interfaced em18 reader with Arduino Uno it was properly working but with Arduino Mega it is not working but all other components are properly with Arduino Mega. Receiver and transmitter LEDs ...
0
votes
0answers
32 views

Arduino Port randomly changes whenever I punch correct RFID tag

I was working on an Electronic Door Lock/Unlock system using Arduino Uno and RFID Reader/Tags on Ubuntu 18.04.02 lts. Now the problem is that whenever I punch-in the correct RFID tag to the RFID ...
0
votes
0answers
188 views

Problem interfacing both esp8266 and EM18 with Arduino Uno

I have connected esp8266 with Arduino Uno and programmed 8266 with Arduino IDE to send data to firebase over WiFi. Now I also want to interface EM18 RFID Reader with Arduino in order to read the RFID ...
0
votes
0answers
300 views

Reading Multiple RFID tags / Reading and ignoring/holding the tag

I'm currently doing a project where ideally I will have multiple objects with RFID tags on them that are placed on top of a Adafruit PN532 RFID Shield connected to a Arduino Uno Wifi Rev 2. The idea ...
0
votes
0answers
102 views

How to put the inputs in array?

I face a problem and I really need help. For my Arduino project, I'm using RFID reader with tags. The story is, I have a desired arrangement for the cards and I defined it as an array called desired[]=...
0
votes
0answers
73 views

Totally unresponsive card with RFID-RC522 Module

I bought an RFID-RC522 module including two attached PICC cards: a blue key chain tag and a white card with the type of MIFARE 1KB. In addition, I bought two other separate cards from the same seller. ...
0
votes
0answers
126 views

Arduino based attendance system

I am working on a RFID based attendance system. I am using Grove-125 kHz RFID reader, SD card module, DS1307 RTC and Arduino Mega. Each component works alone (separately) with the Arduino well, but ...
0
votes
0answers
135 views

Why is this Code not working with Esp8266 when it worked perfectly with Arduino Uno?

I'm making an attendance System using an RFID scanner, scanning RFID Card & saving Data in Excel. When I used this code with Arduino Uno (by changing #define SS_PIN 12 and#define RST_PIN 9) it ...
0
votes
0answers
76 views

Rfid stops scanning after wrong card scanned

My Rfid reader stops scanning cards after scanning the wrong rfid card. It doesn't scan it anymore after turning off the relay. *It turns on the relay if my rfid card is the right one #include <...
0
votes
0answers
202 views

RFID scanner- HZ 1050 Module

I just bought a rfid scanner hz 1050 module at $5 to add to my project,in the module I see a lot of pins to male my connections. Am getting stuck on the ones to use for arduino. I will be glad to ...
0
votes
1answer
3k views

Emulating a generic Mifare USB peripheral device with RFID-RC522

Hardware Dev Board: Arduino Nano V3.0 Module: RFID-RC522 13.56 MHz Cable: USB A - USB Mini B Configuration Physical Code /* * -------------------------------------------------------------------...
0
votes
0answers
517 views

NFC/RFID module multiple cards

I have this NFC module. When i read ONE card at a moment everything works fine, but i need to read more that one cart at a moment. One card lays on a module - module reads it ok, when I move another ...
0
votes
0answers
278 views

Can a 433mhz receiver receive data from a 433mhz tag/fob?

If I use a 433mhz receiver on an Arduino Nano, will it detect a 433mhz tag? I'm not talking about the transmitter that is shown below but a tag/key fob. Example of 433mhz tag
0
votes
0answers
36 views

Is it possible to print all RFID chips in range instead of printing one by one?

I'm currently using an MFRC522 RFID Scanner on my Arduino UNO board. It's possible to scan for all the chips in range, but I can only print them one by one... Is it possible to call a function that ...
0
votes
0answers
807 views

rc522 RFID reader will only accept first tag after power up

I have an interesting problem using the Mifare rc522 device similar to http://www.ebay.com/itm/201415107836 I have this device connected to an arduino uno and drawing power from the 5V supply. It ...