Skip to main content

Questions tagged [mfrc522]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
2 answers
147 views

How could I detect my cat from 1 meter away?

I am building an automated pet feeding system. One of the functions has to be that the system detects that the pet is near. I was thinking of using an RC-522 RFID, but the range on that is 10 cm ...
Matas's user avatar
  • 1
0 votes
0 answers
2k views

mfrc522 Arduino library -> RFID ERROR: PCD_Authenticate() failed: Timeout in communication

I'm trying to do a project using RFID tags to store information to be retrieved later with another device. Kind of a storage memory. I've bougth several tags which I can write and read with several ...
Angel's user avatar
  • 1
0 votes
2 answers
521 views

RFID Multiplexing

I'm planning on doing some project just for fun and education purposes. My project involves RFID technology. I don't have much experience on this topic, however I've been doing research on it and I ...
Rodolfo Contreras's user avatar
2 votes
1 answer
547 views

Can RC522 wake up host controller from deep sleep?

I am using ESP32 with RC522 (MRFC522) module with Arduino IDE. Library used is MFRC522 installed from arduino IDE too. Examples works fine. Is it even possible to use IRQ pin given in module to wake ...
dharmikP's user avatar
  • 525
1 vote
2 answers
102 views

Why is SPI described as output and UART as input in the MFRC522 datasheet?

I am currently trying to figure out why my NFC reader circuit with MFRC522 chip is not working and I stumbled upon this in the datasheet. In the section describing how to activate different digital ...
Lob Ster's user avatar
6 votes
1 answer
1k views

RFID antenna multiplexer

I am working on a project where I need to use a single RFID reader to read tags from 4 different positions (6 cm apart). It is OK to only read one tag at a time, so I figured an RF-compliant ...
jekedorff's user avatar
0 votes
2 answers
210 views

SPI ATMEGA328P does not send back on MISO

I am using ATMega328P and programming in Atmel Studio 7 and I am trying to initialize the SPI. I initialize it and send some data, checked with the oscilloscope, the data is sending on MOSI line but I ...
Gabi Zaharia's user avatar
1 vote
1 answer
771 views

MFRC522 - Impedance control with External Antenna

I am a newbie into the world of RFID. For one of my upcoming designs, I am using the chip MFRC522 and an external antenna. The antenna is W7001. As you can see in the datasheet, It is mentioned that ...
soumya panda's user avatar
0 votes
0 answers
128 views

MFRC 522 not working when using with relay module

I have a circuit which basically have to link up to MFRC 522 module, Arduino Nano and also the relay 2 channel module. See below for the basic schematic. simulate this circuit – Schematic ...
Nick's user avatar
  • 95
1 vote
1 answer
950 views

NTAG213 Not being picked up by the RC522 Module

I have been using the RC522 module to read and write things to the tags it came with. But when I tried to use an NTAG213 I bought for a recent project it will act as if it isn't there. I've tried a ...
Twingemios's user avatar
1 vote
3 answers
5k views

External Antenna connection on MFRC522

New to RFID world. I am working on a Healthcare product. One of the feature includes authentication of patients which will be done through RFID reader MFRC522. Application schematic in the datasheet ...
Lalit's user avatar
  • 29
1 vote
1 answer
782 views

Equivalent Series Resistance of 13.56 MHz RFID Antenna

I am designing a system that uses the MFRC522 by NXP Semiconductors and I am having a bit of difficulty designing the antenna. NXP provide an antenna design guide under the application note AN1445 ...
jackberriman11's user avatar
-2 votes
1 answer
1k views

Working principle of RC522 [closed]

How does the antenna filtering stage work?
Randy Peeters's user avatar
2 votes
0 answers
188 views

"MH" Markings on a MFRC522 RFID reader

I just bough 2 MFRC522 RFID reader from a different store. Both of them work well to read a standard 13.56 Mhz tags. However, one of them have "MH" marking while the other doesnt. The one with MH ...
duck's user avatar
  • 231
1 vote
2 answers
4k views

How to transmit SPI signals through RS422 wire

I'm using several MFRC522 modules which communicate to an arduino with the SPI protocole. The distance between the arduino and the modules will be between 1 and 2 meters. I'm worried about the ...
FrancNovation's user avatar
1 vote
0 answers
303 views

Servo sometimes freezes when used with another servo and MFRC522 RFID reader

I have looked, Googled and researched all over by now and I have not been able to find anyone experiencing a similar issue to mine, so I thought now would be the time to ask my own question on SE. ...
jepster's user avatar
  • 11
1 vote
1 answer
566 views

RC522 board not working, red led is on

I have a RFID RC522 board that was working perfectly, until by mistake I tried to write it with a phone as if it was a RFID tag and now it stopped working, in the way that its led still turns on but ...
Lorenzo's user avatar
  • 155
3 votes
1 answer
660 views

Anti-collision Capabilities of MFRC522

I'm a Computer Engineering student, and my full knowledge of RFIDs is limited to the research I have conducted thus far (mainly using this site). As such, there are still some general concerns I have ...
KC Ford's user avatar
  • 47
-4 votes
1 answer
3k views

Problem using RFID RC522 with Arduino

I am using an RFID RC522 with Arduino but, Arduino is not detecting the RFID connected to it, its showing error. so for this, i ordered a new RFID reader and still, the problem remains the same, I ...
Tarun Yadav's user avatar
1 vote
2 answers
712 views

Driving multiple RFID readers over SPI

I am currently trying to control at least 16 RFID readers (RC522) over SPI communication. The setup is like this: 1 mainboard PCB with 16 sockets for ribbon cable connectors 16 satellite board PCBs, ...
anders's user avatar
  • 11
1 vote
1 answer
1k views

RFID RC522 with STM32F769I-Discovery

I'm trying to communicate with rc522 chip with the use of this code, I only modified the SPI calls to use the HAL libraries and initialized SPI with HAL libraries. Kept all other functions intact. Now ...
xtrinch's user avatar
  • 127
0 votes
1 answer
1k views

RFID IC (MFRC522) with 50-Ohm antenna (taoglas fxr.01.A)

I am trying to make the MFRC522 (https://www.nxp.com/documents/data_sheet/MFRC522.pdf) to work with a taoglas 50-Ohm antenna (http://taoglas.com/images/product_images/original_images/FXR.01.07.0100C.A....
user5343's user avatar
0 votes
1 answer
4k views

Arduino RFID-RC522 can't read all RFID cards

I just got my RFID-RC522 reader & writer. It came with a blank white RFID card and a tag. Both of them prints out the data. But when I try my other cards at home that are also RFID cards then they ...
Hajar Rashidi's user avatar
0 votes
1 answer
676 views

MFRC522 RFID writing personal data

i'm searching for a specific answer about the writing personal data to RFID TAG (mifare 1k). But i could not find anything. Does the chip perforfing a "read back" verification after writing a block? ...
MrBit's user avatar
  • 2,033
1 vote
1 answer
551 views

DESFIRE does not reply to REQA from MFRC522

I'm writing an stm32 driver for the NXP MFRC522 ISO14443A PCD but cannot get it to talk to DESFIRE cards. My code will correctly identify both Mifare Classic (4-byte) and NTAG203F (7-byte) PICCs and ...
William Brodie-Tyrrell's user avatar