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 Cannot read from MIFARE Ultralight
I tried many ways to get and print UID and other data from MIFARE Ultralight but it always ends with error. I am using RFID-RC522 reader with Arduino UNO and MFRC522 Library.
I can normally get and ...
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Save Leading Zero HEX into String RFID RC522 Arduino
I'm using RC522 to read RFID card. All is until if the HEX leading by 0 then i can't save it into String. But if i print it to Serial all is well. Here is my code:
#include <SPI.h>
#include <...
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Sending Data from ESP8266 to PHP
I want to display the RFID tag value to a html file.
I am using ESP8266 ESP-01 module, EM-18 Reader Module, Arduino Uno and Xampp for hosting PHP.
Right now, I am getting a value of "255" in ...
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Arduino RFID tag scanning problems
For a school project, I'm using an Arduino Uno and a Parallax RFID together with some other components, I used a script I got from Instructables for reading my serial input from the RFID (link: http://...
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MIFARE RC522 I2C Library
I was looking at this link on RFID I2C interface. I added the library to arduino, but in main.cpp, I see an error:
In function 'void setup()':
sketch_mar27a:16: error: no matching function for call ...
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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 &...
2
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0
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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
...
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ESP8266/NodeMCU unable to communicate with MFRC522 RFID reader
I am trying to use the 'DumpInfo.ino' example file to dump an rfid tag, the only changes i have made to the example is changing the pin settings.
#define RST_PIN 3 // Configurable, ...
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2
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Passing the result of the variable to another variable
Hello everyone i'm figuring if this variable can be passed to another variable. I'm using RFID RC522
Here is the code:
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN ...
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arduino rfid with led, code is compiling but not working as expected! [closed]
code is compiling, what I want is that when rfid tag kept led should get on but instead its getting to the else loop.
int count = 0;
char input[12]; // rfid input
int led = 3; // led pin
char first[...
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Problem "Didn't find PN53x board" in Arduino Uno E-Card Reader [closed]
This is component to make E-Card reader, using arduino uno pn532
Code
if (success) {
// Display some basic information about the card
Serial.println("Found an ISO14443A card");
Serial....
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Arduino TimerOne breaks the program when calling "digitalRead"
I'm trying to make this project.
But i have a problem running this code. It appears to be val = digitalRead(inPin); breaks entire program. just because i call this from the callback function which ...
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Rfid reader and SD card shield won't work together
I recently encountered a problem that's been bugging me for days. I want to make a project using a RFID reader and log data on an SD card with an Arduino Nano, but apparently no matter what I do, I ...
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"Soft WDT reset" stack error: RFID-RC522 with NodeMCU
I have been all over the internet to try and find a solution to this, but after one solid week of intense Google searching I have come up with nothing.
What I'm trying to accomplish:
I am simply ...
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Arduino Nano wih mfrc522 warning error
UPDATE
I have managed to get rid of the WARNING: Communication failure, is the MFRC522 properly connected?. Unfortunately, that did not fix the firmware error it now says 0x80. I have now also tried ...
morgan
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Interfacing Aduino Nano and RDM8800
I'm attempting to use an Arduino Nano with the RDM8800 to read data from NFC tags. After soldering wires between the Nano and the RDM8800, I attempted to test these devices using code similar to what ...
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How to send MFRC522 data to a C# app using a NodeMCU TCP server?
I am trying to send MFRC522 data to a C# application through a NodeMCU acting as an access point for the C# app. I have modified the code I got from this site.
#include ESP8266WiFi.h>
#include SPI....
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1
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Detecting the presence of a specific smartphone [closed]
I would like you to give me some clues about a projet I have: I want to make sure that my little brother's smartphone stays in a shelf overnight and during school hours in order to monitor the time he ...
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RFID + LCD + Arduino Mega 2560 = RFID not printing correctly
My Arduino Mega isn't printing the RFID card's tag it simply prints the card's 2 digits at a time but deletes the previous prints. Can I get help with this?
#include <SPI.h>
#include <...
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How can I write an integer to a Mifare RFID card using the RFID library?
I'm a beginner to C++ and I'm clearly missing some fundamental knowledge of data types. As such, I'm struggling to adapt the examples in the miguelbalboa/rfid library to my use case. I'm simply trying ...
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How to connect RFID Module to Arduino UNO
I brought 860mhz-960mhz UHF rfid reader module for chip card skimmer from follow link:
https://www.alibaba.com/product-detail/860mhz-960mhz-UHF-rfid-reader-module_60312310172.html
I want to do ...
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Arduino Nano + RC522 + w5500 Ethernet Module
has anyone had any experience wiring up an arduino nano with an RC522 RFID module and a W5500 ethernet module? i can get each of them to work individually, but i cannot get them to work together. i am ...
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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 ...
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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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1
answer
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Can I use an Arduino Uno to support an RFID reader, Zigbee module and a touch screen at the same time?
I'm almost a beginner to microcontrollers and have done a few simple projects, but this time I have to use an Arduino Uno (powered by a battery) to support an RFID reader (RC522), a Zigbee module and ...
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Arduino UNO + Ethernet Shield + LCD + RFID but RFID doesn't work
I've been working to a project that uses arduino for RFID but when connected to ethernet shield, the RFID seems to not read any card tapped to sensor but the LCD seems to do fine. Here's the code I ...
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RFID access system with PN532 reader
I have a PN532, so it's capable of both reading and writing. I've used it for a few perfectly functional things, but I want it to authenticate based on the contents (for example 1024 bytes) of a tag.
...
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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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RFID does not respond after Ethernet.begin(mac, ip) initialization
Good day, I have this problem with my simple project. I have a database with all RFID number of employee. What I want to do is to use an rfID to check if it is registered in the database. If it is, it ...
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Connecting multiple boards to Arduino Uno r3
How can I connect the Arduino RFID RC 522 and SD card adapter to one Arduino Uno R3? As each library takes specific pins in Arduino for MOSI, MISO, CLK. So I have conflict in the pins, how can this be ...
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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 ...
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How can my library source code instantiate an object from another library?
I'm having trouble explaining my issue. What I'm doing is creating a library to work easily with the RFID reader/writer RC522 module. I need to create an object of the library MFRC522 in my .cpp file ...
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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
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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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1
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NodeMCU with RFID RC522 and I2C interface LCD module together
I'm newbie in Arduino programming so I hope to get a clear answer.
I have NodeMCU v1 12-E, I connected it with RFID RC522 as in attachment picture.
Now my question:
I need to connect I2C interface ...
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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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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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2
answers
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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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Getting RFID tag data using C#
I am trying to get an RFID tag number using a WinForms application. But whenever I click the Button the application stops responding. Please help regarding this.
Arduino code
void setup() {
Serial....
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Using RFID and fingerprint sensor together
I am using both an RFID and a fingerprint sensor in my project. When running the program, the RFID is detected but the fingerprint sensor is not detected and hence my code is not going forward.
Here ...
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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 ...
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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 ...
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Multiple MFRC522 RFID reader on Uno bugs
I have a problem!
I need to connect 5 MFRC522 readers on an Arduino Uno but it is not working !
With one or two MFRC522 modules it works, when I use three or more nothing works anymore... The serial ...
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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 ...
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Adding Library to my sketchbook
Hey so basically I have my Arduino uno r3 setup with my RFID-RC522. I am looking to add this library to so I can use the examples alongside the ones I already have.
https://github.com/BoolLi/...
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Arduino Shield on Breadboard
I would like to ask if I can stack directly Adafruit PN532 RFID Shield onto my breadboard. Or do I need something for that? Thank you.
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The working of a MFRC522 and its Interface protocols?
I've actually messed up and posted into the stackoverflow site, even though I'm probably not meant to. I've been given this datasheet, but even though it does explain somewhat how each host interfaces ...
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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 ...
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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 ...
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7
answers
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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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