Questions tagged [rfid]

RFID stands for "radio-frequency identification" and is used to identify and track objects via wireless communication over short distances.

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How can Rpi SPI python read the MFRC522 RFID / NFC module?

Trying to read my RFID MFRC522 using a Mifare blue tag and it is not working. Wondering if i could get any help on this as when i put the tag to read it doesn't show up as quick? using: https://...
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2answers
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How do I use three RC522 RFID readers together?

Ok, So I have one RC522 reader working with no issues. I want to have 3. I don't care which receiver picks up the RFID tag, I just want to know whenever a tag was picked up at all by any of them. ...
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2answers
6k views

How to read Wiegand serial data? (Rx/Tx)

Ok, I am losing my mind... Why is this so damn difficult? Current situation: - 12V Access control device that is connected like this i.e. Wiegand D0 to Tx and D1 to Rx, with voltage dividers. - ...
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2answers
6k views

how to enable spi1? / pi 3 and two rc522 RFID readers

Is it possible to connect two RC522 readers with one RaspberryPi 3? As far as I know I should just choose different CS pins for them (Add more than 2 SPI slaves). I have following connections: 1st ...
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1answer
241 views

Way to get signal strength from an RFID reader?

I am attempting to make a grid of RFID readers that can triangulate the position of a tag within their read range. I am currently using MFRC522 readers connected to a Raspberry Pi 4 Model B (4gb) and ...
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1answer
131 views

RFID and LED Script disables RFID reader until reboot

I have two simple scripts, which work individually. One simply lights an LED, the other reads RFID. Now I want to put them together, but seem to fail. Once this runs, I can't read RFID anymore until ...
5
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1answer
9k views

Major trouble with nRF24L01+ controllers and the RF24 library

I've had a hellish last three days. All I've wanted to do is get an Arduino Uno and a Raspberry Pi B+ talking to eachother with these little guys, and after following many different tutorials, I've ...
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2answers
11k views

ITEAD PN532 on Pi 3 with libnfc

For the past weeks I have been trying to get the ITEAD PN532 NFC board working on a Raspberry Pi 3 running Raspbian Jessie (2016-03-18) using libnfc. Here's some info on the board itself. It has two ...
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0answers
4k views

RFID RC522 Stops reading data after reading data continuously

I'm trying to make RFID RC522 work with my Raspberry Pi 3 B+. I use the library MFRC522, and the the sensor can read data most of the times. However if I just put the card on the sensor it will stop ...
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2answers
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Impossible to scan RFID tags using libnfc, PN532, and RPi3

I recently bought this NFC/RFID reader PN532 module V3 I want to use it with my raspberry pi 3. I have install and configured the library libnfc. The PN532 is connected with I2C. I have well enabled ...
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1answer
10k views

Raspberry Pi and the ACS ACR1252U USB NFC Card reader

I'm using a ACS ACR1252U card reader (http://www.acs.com.hk/en/products/342/acr1252u-usb-nfc-reader-iii-nfc-forum-certified-reader/) connected via USB and to be honest I have no idea how to get it ...
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2answers
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Connecting to an RC522 RFID reader

I'm trying to connect an RC522 RFID reader to the a Raspi via its SPI port. Up till now, I have tried several different pieces of code that are supposedly working, however, I have had no success with ...
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5answers
425 views

Raspberry Pi , RFID , Relay Module and Magnetic Door

I have used the code from github and in that code i am implementing the raspberry pi and the RFID and relay module with magnetic door unlock. Everything is working Okay , the RFID , the Relay module ...
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0answers
224 views

Reading ISO15693 SLIX2 18000-3-1 RFID tags with Raspberry Pi

There are Raspberry Pi components like RC522 that can read NFC tags, and it only supports ISO/IEC 14443 A/MIFARE and NTAG. We can't use those. We are looking for a component that can read ...
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0answers
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Problem in the SPI communication with RFID-RC522 (spi mode)

I have some trouble using the RFID-RC522 reader with my RPi. It was working in the past, but now it stopped. I'm trying to find if a configuration changed somewhere and I also looked at the code of ...
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0answers
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My rfid-rc522 reader stops reading after some time, how can I debug it?

I'm using the reader below to read mifare cards (13.56mhz), I have an electron/node.js application for this. For some reason after an uncertain amount of time(shortest time I noticed was about 30 ...
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2answers
4k views

MFRC522 Not working over SPI Interface

I am running (on a Pi3) an MFRRC522 reader - much like this one: It has been working fine, but after I changed SD card, to increase capacity - whilst also doing a new Raspian install I haven't been ...
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0answers
1k views

Connect two SPI RFID readers in the Raspberry Pi B +

I followed this tutorial to connect one RC522 RFID reader in a Raspberry Pi. http://www.nikolaus-lueneburg.de/2014/06/rfid-rc522-modul-mit-spi-schnittstelle/ I'm able to connect it to work with ...
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3answers
5k views

how to use two rfid rc522 nfc tag reader with a raspberry pi?

I am currently using a rfid rc522 nfc tag reader with raspberry pi using the MFRC522-python code. In my project I need to collect data from two rfid rc522 cards at the same time, rc522 are located at ...