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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RFID-RC522 not working, red led is on

I am working with RFID-RC522 and Arduino UNO. I have check pin configurations again and again tried different libraries. It is not reading card and red led on RC522 is consistently on.
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25 views

Does RFID-RC522 supoort tk4100 chip protocol ISO18000-2C 10 digital ID card?

I have ordered a starter kit and received RFID reader is RFID-RC522 module with one card and tag now I need more RFID card for my project and I can't find the supported card type for my project ...
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11 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. ...
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137 views

How to add if condition in RFID example?

Using an Arduino Mega 2560 and PN532 NFC/RFID module, I want to be able to scan a card and see if its value is (0xF0, 0x21, 0x5D, 0xA7). It should print "accepted" in the serial monitor. However ...
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22 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)...
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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 (...
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530 views

RFID-RC522 not working with Arduino Uno clone

I am using this library https://github.com/miguelbalboa/rfid, and using DumpInfo.ino from it: /* * ----------------------------------------------------------------------------------------------------...
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1k views

RC522 RFID reader doesn't read NTAG216 chip

I have an RFID-RC522 module based on the MFRC522 chip. This chip is described in the datasheet as supporting "ISO/IEC 14443 A/MIFARE and NTAG" protocols. I have wired it up to an Arduino Uno using the ...
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2k 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 /* * -------------------------------------------------------------------...
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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 ...
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1answer
1k views

MFRC522 won't detect cards after the first loop

Edit: I have found out that it was something wrong with the cables. I have solved the problem. Thanks for everyone who tried to help. I am working a project that should basically do: Read the RFID ...
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873 views

Arduino RFID with motor and limit switches

Thanks for looking into my Arduino code. I'm building an automated sliding draw, and I'm trying to activate the motor with a RFID scanner. The scanner waits for the token, and once it detects a token ...
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134 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 ...
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384 views

RDM6300 continuous RFID tag read

I have an RDM6300 connected to an Arduino Mega and code that can read the tag just fine: // Function prototypes void setup(void); void loop(void); // RDM6300 packet details #define ...
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1answer
117 views

Can 1 wiegand output for 2 controllers?

recently I have this project which needs to read 2 wiegand signal using Arduino Mega 2560. I have an access control device which will output wiegand signal once the user is allow to enter, and there'...
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rfid_default_keys check with RC522

I just received a RC522 board and since i am new to RFID, I tried out some examples from "Arduino RFID Library for MFRC522". Here's one of them rfid_default_keys /* * -------------------------------...
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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 ...
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421 views

Problem “Didn't find PN53x board” Arduino NFC Card Reader

i am using the elechouse PN532 RFID Module with an Wemos D1 mini in the Arduino IDE. I use the ISO1443a_uid example from the elechouse library. All works fine if i plug the USB Cable into the wemos ...
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34 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 ...
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67 views

Does MFRC522 supports native SPI of Arduino Due?

Does MFRC522 library support native SPI interface of Arduino Due? By native SPI I mean this one: I came here with this question because the initializer asks for 2 pins: SS and Reset: MFRC522(byte ...
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25 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 ...
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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 ...
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5answers
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MFRC522 not scanning card

So I have an Arduino Uno and an MFRC-522 reader, using a breadboard I've wired it up according to the example sketch which is the mfrc522 DumpInfo sketch. /*Typical pin layout used: * * ...
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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 ...
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298 views

SM 130 RFID reader, with Arduino Uno. Trying to read RFID passive tags on Arduino version 1.6.7

I am trying to read passive tags using these two devices and an arduino uno, for a class project of trying to make my own doggy door. However, all the code I have been able to find is out of date, ...
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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. ...
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2answers
730 views

RFID+Fingerprint sensor code

I'm trying to create a security door system that uses an RFID and fingerprint sensor (Adafruit) to allow/deny access to a door. I have the fingerprint sensor and RFID hooked up to an LED, but the code ...
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2answers
245 views

I am trying to combine an automatic door lock with an RFID MFRC522 with a IR REMOTE program

I am getting this error. Arduino: 1.8.2 Hourly Build 2017/02/17 11:33 (Windows 8.1), Board: "Arduino/Genuino Uno" Tone.cpp.o (symbol from plugin): In function `timer0_pin_port': (.text+0x0): ...
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1answer
53 views

Using Arduino as contact to the world for linux box if app crashes

I am new to this micro controller thingie world so bare with me :) Let me describe a scenario first. Say I have a linux box for house automation embedded in a wall. For security reasons is the only ...
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1answer
209 views

How to connect SPI device on Etherntet shield on Arduino Uno

In my project I need to connect RFID reader (RC522) on top of the Ethernet shield because of it's capability of reading and editing SD card. When I connect only RFID sensor on Arduino, it works. Same ...
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1answer
146 views

NodeMCU: Wiegand not working for one device, while working for another

I'm using a NodeMCU, and a working code for reading Wiegand data, with this library. I managed to successfully read the Wiegand signal from this device. However, I also have this new AR-721H device, ...
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2answers
80 views

How Should I Send Data to My Laptop from Multiple Arduinos?

I'm working a project which involves reading multiple RFID tags, from multiple directions, at the same time. Because of the multiple directions, I need to use multiple antennae. Because of the ...
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2answers
251 views

MFRC522 ReadNUID example reboots unless I include a null if statement

I'm fairly new to Arduino (and C), but not to embedded electronics and programming. I'm using an MFRC522 module (the common one) with a Nano, and getting some strange results. They are on a very ...
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263 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 ...
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1answer
2k views

Arduino Uno - How to write personal data in NTAG213 using RFID-RC522

I am trying to write some data in NTAG213 sticker with this code: #include <SPI.h> #include <MFRC522.h> constexpr uint8_t RST_PIN = 9; // Configurable, see typical pin layout above ...
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691 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....
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1k views

MFRC522: Firmware Unknown

Can someone help me what is the meaning of this sketch? It always outputs in the serial monitor: Firmware Version: 0x1C = (unknown) Scan PICC to see UID, SAK, type, and data blocks... This is the ...
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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 ...
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1answer
35 views

HTTP myphp request error RFID

This program is a program which readings of rfid are saved to myphp database. I have a problem when running the code The wifi is connected but when the code doesn't save im assuming that the problem ...
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82 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 ...
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28 views

How to use sparkfun qwiic rfid with arduino uno [duplicate]

https://learn.sparkfun.com/tutorials/sparkfun-qwiic-rfid-idxxla-hookup-guide Hardware: Arduino UNO R3 Sparkfun qwiic rfid Id-20LA I followed this tutorial. I used the code on the website. I don't ...
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2answers
198 views

Serial.available is working only for the first time

I am working on RFID. I am sending data through serial monitor and the Serial.available is not identifying the data after the first time, its working perfectly fine only once after reopening the ...
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1answer
20 views

Can i use a sparkfun rfid qwiic without an id-xxla? [closed]

Sparkfun rfid qwiic id-20la I am using an Arduino UNO R3. You should assume that i don't know anything. If yes can you give some information about how to do it? Thanks for any help.
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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 ...
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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 ...
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110 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 ...
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70 views

Is there a way to have the LED switch on after 10 readings or say a minute?

I am using Arduino for a RFID project where the LED must switch on after either 12 readings of the tag or 2 minute, the tag reading happen every 10 seconds. I can't seem to figure out a way to have ...
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1answer
131 views

Rfid with Adafruit fingerprint together not working in Arduino Uno

I have edited my Code and now the issue is both are working but not together #include <Key.h> #include <Keypad.h> #include <Adafruit_Fingerprint.h> #include <SD.h> #include &...
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1answer
46 views

Is SPI a good way to connect two rfid modules on separate arduino boards?

RFID access control I have two separate rfid projects on separate arduino, the first project requires 2 minutes of contact between the tag and the reader after which it turns the LED on. the second ...
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1answer
149 views

Arduino program to scan two different rfid cards in same program ? Im using nodemcu- esp8266 , rc522 reader and Firebase

/*My project is a Library management system using rfid cards. Im trying to generate a code wherein User first scan a book and then the record will be pushed in Issued_Books table in Firebase . Then ...