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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Am I using an RFID-RC522 V2?
When I buy RFID-RC522's online, I aim to buy V2 units. so I can boost the Antenna Gain to improve range.
When I add one that I have bought to a system, It sometimes shows up as a V1 module, so I have ...
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Using MFRC522 along with other inputs(Bluetooth, keypad)
I'm making a little parking lot, which includes mostly opening a servo motor using either keypad, bluetooth(hc-05) and freshly added, Rfid(RC522)
I cant get inputs from other sources if i want to get ...
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When the value of enter is greater than rfid tap, the commands under them do not work
LiquidCrystal\_I2C lcd(0x27,16,2);
\#define sensorPin1 7
\#define sensorPin2 8
int enter=0;
\#include <SPI.h>
\#include <MFRC522.h>
\#define exp\_buzz 3
\#define SS\_PIN 10 ...
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MFRC522 board not detected. Red LED lighting
Mega 2560.
I can't get the RFID board detected. The code is below, and outputs "Didn't find MFRC522 board.". I also tested some other library and test code with success.
I triple checked the ...
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How can i make my MLX90614ESF scan temperature after the MFRC522 scans the RFID tag? [closed]
//THIS IS THE RFID CODE
#include <SPI.h>
#include <MFRC522.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // ...
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Using RDM6300 and RC522 at once
I want to use both RDM6300 and RC522 at a single .ino code at once. But whenever I try them both, only one of them works. How to get the both working?
[Dev envt. ESP32 Dev module]
// LIBRARY ADDITION ...
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Cannot compile MFRC522 minimal I2C example
On ESP32 I'm trying to build the Minimal I2C example of the MFRC522 library:
But I get errors on the first declarations:
TwoWire i2cBus = TwoWire(0);
MFRC522_I2C dev = MFRC522_I2C(RST_PIN, 0x28, ...
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How to send int array with ESP8266 http post request?
I'm reading RFID cards' UID with an ESP8266 and trying to send that information to my web server hosted on a Raspberry Pi. I'm currently storing the UID in an int array, but the http.POST(); function ...
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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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Detecting different objects closeness
iam currently working on a new project, where i would like to detect the existence/closeness of several objects around the arduino up to like 1 meter. I was thinking about an rfid setup, but as the ...
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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 &...
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Wired Teensy 3.5 AudioShield and RFID RC-522
I received a set of wired Teensy 3.5 AudioShield and RFID RC-522.
The audio shield is mounted on the Teensy but I cannot connect the MFRC522
Using MFR222 library. Pins are set to 0 and 31:
#define ...
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Emulate RFID Tag [closed]
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. ...
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Hex/Byte Reversing and Conversion
I'm working on an RFID system using a MFRC522 with this Library : https://github.com/miguelbalboa/rfid
Here's the code I have right now:
int A=(mfrc522.uid.uidByte[0]);
int B=(mfrc522.uid.uidByte[1]);...
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RDM6300 library not working on ESP8266
I have a RDM6300 RFID module which I am trying to connect to an ESP8266 by using rdm6300.h library.
I had it all up an running all along with other components but we had connected to the ESP8266 but ...
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My PN532 doesn't detect RFID card when connected with ESP32 in I2C mode while it works perectly with Arduino Uno
I have a Elechouse PN532 module (bought here - https://robu.in/product/pn532-nfc-rfid-read-write-module-v3-kit/). When I try to use to it with I2C and connect it to my ESP32 (DOIT ESP32 DEV KIT V1, 30 ...
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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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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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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, ...
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I am trying to use Arduino Uno as a hid device to login Windows but I cannot use Modifier keys to Lock Windows
uint8_t buf[8] = { 0 };
#include <SPI.h>
#include <MFRC522.h> // RFID library
#define SS_PIN 10 //RX slave select
#define RST_PIN 9
int gled = 7; // optional
int rled = 4;// optional
...
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Rfid Mfrc522 not working using long cable
I am doing a project using Arduino and a Rfid Mfrc522 module that consists of reading a card to unlock/lock a door. The Arduino is 3 meters far away from the Rfid Mfrc522 module and I used 7 cables to ...
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I have an 'error' with my code
The following code gives me an error:
// RFIDunio.h is from http://learn.robotgeek.com/getting-started-guides/39-robot-kits/151-rfiduino.html
#include <RFIDuino.h>
byte keyTag[5] = {0,0,0,...
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Rfid checking continuously for cards
Well I am making a automatic car parking system where a any one parking their car will get a card as a token and have to return it before leaving with their cars one card for a slot
And if they don't ...
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rfid module not working (rc522)
i brought a rfid module which is rc 522 but when i upload the code it is not reading the card even when i upload example code i have returned it 2 times and got it replaced but the same problem may i ...
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RFID RC522 reads the previous tag serial with different tag
I hope someone can help me.
I'm using a Mega with RC522, and this happens:
I use a tag, it reads the right serial (e.g. AA:BB:CC:DD). Then I use a second tag and sometimes it gives me the correct ...
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NFC hang after RF_ON command
We have developed our board with PN5180 NFC but I cannot make it work properly. After I send RF_ON command I am stuck on STATE_CHANGE_IRQ_STAT while waiting for TX_RFON_IRQ_STAT but the state never ...
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Trouble interfacing PN5180 RFID Module with Arduino Uno
I bought the PN5180 module a few weeks back and I am having quite a bit of trouble interfacing it with my Arduino Uno. The library that I am using is ATrappmann PN5180 Library. The link of which is ...
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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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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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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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Store Integer Value of Money on an RFID Tag
I am working on making an Arduino based arcade. I want each user of the arcade to have an RFID card that stores the amount of credits (basically money) they have. I know that RFID tags have 1028 bytes ...
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Using ICSP pins as SPI in Arduino Due
I am using two RFID sensors operating on SPI with arduino Due. They will not be operating at the same time.
Is it favorable to use the ICSP pins as SPI pins for one of them, or use them in a one ...
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How to combine Read/Write Data Code for RFID tag?
I have the two example codes from MFRC522 Library and I want to combine them together so I can at first read the data from the tag and then write something new on it by using the serial input. I´ve ...
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RFID and Keypad Based Door Lock Using Arduino [closed]
I'm new to the Arduino world and I have a question. I found this project to do but I need your help, I want instead of this servomotor to put an electromagnetic door lock, could you help me with the ...
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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 ...
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How can I get an integer from an RFID tag from Arduino Mega to NodeMCU 1.0 over serial communication?
I want the number from an RFID tag read by a reader connected to an Arduino Mega to end up as a string on a NodeMCU connected to the Mega. I am trying to confirm that the string is on the NodeMCU ...
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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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lcd byte array display
when reading RFID(MIFARE) information using Arduino mega and display in serial monitor it works fine. But, when printing on 2004LCD only one information(Value) displays correctly. The other ...
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EM-18 RFID module not reading Card ID
I am using EM-18 Rfid module with Arduino mega the problem is that when i swipe the card for reading the card ID nothing will shown in serial monitor.Code given below.EM-18 connection diagram is given ...
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How to send the MFRC522 RFID module into sleep mode?
I'm trying to get the power consumption of a MFRC522 RFID module down, currently while running it consumes about 4mA. There should be a way to put it into sleep mode, I just can't find any ...
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I'm desperate and need help with MFRC522 (stops working randomly)
I've made a light switcher that switches lights on for 15s after a correct tag is presented, and also when door is opened for 6 seconds (its for outside) so i can see a keyhole after leaving for a ...
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MFRC522 Communication Failure
I'm using TTGO ESP32 and I've got an MFRC522 from AliExpress.
I've soldered connector pins to the board itself (both for ESP32 and MFRC522) and I'm using jumper wires female-to-female to connect ...
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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 ...
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Read Simultaneously RFID TAG with multiple RFID Reader [MFRC522]
i have a project that use two RFID Reader, the project for counting tag from conveyor belt, in this case the reader will placed in the middle of the conveyor belt and the reader faces each other.
So ...
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arduino parking lot
I want to make a project where there is a parking lot and a ir sensor which senses when a car comes and displays a message on lcd saying to insert a rfid card and then it opens a gate and there are ...
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i need help my coding for my fyp
how my coding works = 1 rfid card detect on first rfid reader and 2 rfid card detect on second rfid reader after that servo go to 90
my second rfid not detect
this is my coding
#include <SPI.h>
#...
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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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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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NodeMCU unable to communicate with MFRC522 RFID reader even though the nodeMCU is successfully connected to a mobile hotspot
I am replicating 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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How to connect arduino mega 2650 and motor driver shield with seperate powers source?
I am building a robot that runs only when a matching rfid tag is identified..for that i need motor driver shield for running the motors and rfid module. The problem is if i attach the motor driver ...
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