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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Use RFID-RC522 with other Pins

I'm wondering where the pin setting is manifested in the library. I want to use the RC522 with other digital pins than the default 50-53 pins, because I am using a shield for a display on theese ports....
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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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2answers
272 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
514 views

How to connect Sparkfun M6E Nano UHF Rfid reader and ESP8266 NodeMCU 0.1

I am using an ESP8266 NodeMCU v0.1 and Sparkfun M6E Nano UHF Rfid reader. How to connect NodeMCU to M6E Nano UHF Rfid reader?
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3answers
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Issue sharing MISO with multiple RC522 RFID Readers

so for about the last 8.5 hours (almost non-stop) I have been trying to figure out one issue and I have exhausted every search I could possibly think of. I'm building a puzzle that requires 5 RFID ...
3
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1answer
5k views

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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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 ...