rfid

问题 I am working on project where I need to read ID of NFC tag, and then perform some action based on that ID. So far I am able to read it once (object with tag is on the reader whole time), but I also need to have some feedback when object is taken off. I am using MFRC522 reader with RPi and SimpleMFRC522 library. I've tried poking around code in that, but without any success. Do you have any directions / ideas? I have following code: reader = SimpleMFRC522.SimpleMFRC522() buffor = 0 while

问题 I am using the instructions of https://pimylifeup.com/raspberry-pi-rfid-rc522/ to learn how to read my rfid-rc522. I installed all the things needed, and cloned from git all the files. I connected accordingly and double checked the wire. The code in Write.py is #!/usr/bin/env python import RPi.GPIO as GPIO import SimpleMFRC522 reader = SimpleMFRC522.SimpleMFRC522() try: text = raw_input('New data:') print("Now place your tag to write") reader.write(text) print("Written") finally: GPIO.cleanup

问题 I have two NFC tags with different keys for their sectors: Tag 1: This tag contains an NDEF message. Sector 0 = A0:A1:A2:A3:A4:A5 for key A Sector 1 to 15 = D3:F7:D3:F7:D3:F7 for key A Tag 2: No NDEF data on this tag All sectors = FF:FF:FF:FF:FF:FF for key A and B Are there standard keys for MIFARE Classic tags according NDEF/non-NDEF? 回答1: Correct. The application note MIFARE Classic as NFC Type MIFARE Classic Tag defines how a MIFARE Classic tag can be used to store NDEF data. This

问题 I want to ask 2question about nfc card emulate : can I emulate nfc card include uid that I select? I read HCE and don't understand what is the diffrent between HCE and Card Emulation with a Secure Element?. what are the disadvantage with the Secure Element ? i can't control on the card data/uid and on HCE I can? 回答1: This subject may be a bit old but I was asking myself the same question. Apparently the UID of the card emulated by your phone is random, but if you want to emulate the UID too

问题 I've been asked to develop an app with the core functionality of reading RFID chips in pets and checking those identification numbers against a database through some web service. I was first directed towards iCarte, supposed maker of an NFC/RFID Reader accessory for iPhone. I sent them an email that was immediately returned due to them exceeding their mailbox quota, so I suppose they are out of business? Other solutions come in the form of Bluetooth ready readers, like those from Serialio.

问题 I've been asked to develop an app with the core functionality of reading RFID chips in pets and checking those identification numbers against a database through some web service. I was first directed towards iCarte, supposed maker of an NFC/RFID Reader accessory for iPhone. I sent them an email that was immediately returned due to them exceeding their mailbox quota, so I suppose they are out of business? Other solutions come in the form of Bluetooth ready readers, like those from Serialio.

问题 When I try to transceive commands for NFC-V Tag-it HF-I Plus Inlay tag I get a TagLostException for most of the commands. From the links I have gone through this exception may be caused by incorrect commands. How can I create correct ISO15693 command byte[] for Nfc V Tag-it HF-I Plus Inlay? The datasheet shows the supported commands but how can I create correct commands to read NFC-V tags? The commands in the document are: The tag that I'm trying to read is: Code: Tag tag = intent

问题 I am trying to implement an authorization system based on general NFC tags. One of the concerns I want to address is tag cloning. I have read some literature ensuring tag authenticity by using a read-only tag ID written on the tags during manufacture. This ID is signed by the owner and written on the tag. This way, a cloned tag (which will have a different, tag-manufacturer assigned ID) can be detected by comparing tag IDs with the cloned signature. My question is, is it safe to assume that

问题 I have an Identiv uTrust 3700 F CL Reader that I can't setup with on macOS Catalina 10.15.4. I would like to read NDEF Tags , use U2F (FIDO2 CTAP1) via NFC, and emulate a card from the reader (for other readers to read, like an Android or iOS device) where my host acts as the secure element. My reader works great with opensc-tools to list the reader. I suspect multiple processes are competing for the USB device. This section from libnfc indicates a related device (the SCL3711, which is

问题 I have an Identiv uTrust 3700 F CL Reader that I can't setup with on macOS Catalina 10.15.4. I would like to read NDEF Tags , use U2F (FIDO2 CTAP1) via NFC, and emulate a card from the reader (for other readers to read, like an Android or iOS device) where my host acts as the secure element. My reader works great with opensc-tools to list the reader. I suspect multiple processes are competing for the USB device. This section from libnfc indicates a related device (the SCL3711, which is