I got a RFID-RC522 along with two RFID cards. I am using Arduino and trying to read cards. I have successfully read those card which was along with RFID-RC522. But when I am trying to read different card means my friend's office card then nothing is happening.
Thank for your help...
Simple Solution: increment supply voltage, like 3.3 to 3.6V.
I am also powering the reader with 4.8V and it has been working without troubles since months. I was having the same issue as you, maybe it could read other cards eventually but no more than the ones that goes with the RC522 reader.
This is because some cards needs more energy to transmit the data to the anthem of the reader. When you increment the power, you can also arrive to other cards that maybe need a little power extra to transmit information.
Cards readed succesfully: Mifare 1K, Mifare Desfire, Credit Cards. (No more card types have been tried.)
RC522 only works on 13.56MHz frequency, wich is the most common. Other frequencies can be used in RFID cards, I think this is the problem because RC522 should read other cards formats (even if not suported). If this was the case RC522 should be able to read the header of the card in wich is described the card type, but if thecard works in other frequency it shouldn't be able to read it at all.
Related
Is there an open standard for transmitting M2M data via audio?
Use case example: I want to broadcast a public PGP key via some sort of audio output.
You want to use "Frequency Shift Keying". It works by encoding bits into different frequencies of tones.
If you're doing that on Linux, use Mini Modem (http://www.whence.com/minimodem/).
If you are trying to accomplish this on windows, there are a number of amateur radio tools that transmit FSK signals over a soundcard. Try googling for "Sound card FSK modem"
Just for fun, here's a link to the "Kansas City Standard", which was intend for storing data on audio cassete: https://www.wikiwand.com/en/Kansas_City_standard
I hope someone can provide a simpler solution but so far I've found that a process called modulation was used to transmit data over audio in the days of dial-up:
Data to audio and back. Modulation / demodulation with source code
If time is not critical then DTMF - up to roughly 10 signs or 40 bits per second.
I need to do some NON-STANDARD signal processing operations with an RFID-reader, so I'd like to know if it is possible to extract antenna's individual analog (actually digital samples right after ADC) input signal samples with Motorola FX7500 (if you know how this works on FX7400 or FX9500, please do tell, could be helpful). Samples would be processed in a JAVA-based host computer program.
What I've already tried:
Investigating Motorola's own RFID3 API's possibilities, it doesn't go deep enough to actually get in touch with input analog signal samples.
Using LLRP to its full extent, it doesn't allow analog signal sample access either. RFsurvey-functionality would have been helpful to some extent, but FX7500 doesn't support it either.
Accessing RFID-reader's linux terminal, trying to find the driver function(s), that could listen the input sample stream. If current input sample(s) could be extracted from the input stream, I could (in theory) make a script, that would save a few of those sample values in a txt-file in the host computer during a tag inventory round. My linux skills are kinda bad, hence I ask this question.
The only realistic way to solution seems to be via linux terminal, so if you folks have any ideas about that (where to look and what to do), please advise!
Contents of reader:
rfidadm#FX7500abcdef:/$ ls -1
apps
bin
dev
etc
home
include
lib
linuxrc
media
mnt
platform
proc
readerconfig
run
sbin
sys
tmp
usr
var
I cannot completely rule that out, but it's highly unlikely you can get the raw signal digitized; the devices you're looking at aren't really software defined radio devices, typically.
"speaking" RFID physically is a bit different from "usual" wireless communication: The reader doesn't only observe the energy transmitted from the tag, but more importantly the fluctuations of energy extracted from the near field of the reader's antenna coil. Hence, you don't actually have a baseband of RF bandpass signal, but hardware-specific modulations of transmitted (and inversely, antenna-reflected) energy. Demodulation is hence usually done in specialized hardware.
However, do not fret: It's totally possible to build a software defined RFID reader. There have been several approaches to that, but personally, I trust these based on Ettus USRPs and/or GNU Radio best. Look through the results IEEExplore gives you, eg. this search.
Most probably this is not possible with the Motorola readers. What you can do, is use one of the RFID chipsets available on the market: either the AMS RFID IC's, or the Impinj RFID IC's. As far as I know, both IC's support retrieving the digital samples that are received. They also have a development kit to test-drive the IC's.
I was wondering if it is possible to modify the contents of a BLE beacon to include extra information. If you insert an extra bit at the end you could potentially broadcast a boolean in one direction. Theoretically, if you modified your device to read the extra bit of information this would work. Given existing protocols though it sounds like this would be a lot of work. Is there something out there like this already?
For info, I'm working on the mbed platform where you can modify your own bluetooth beacon payload.
Yes, you can do this with the new AltBeacon specification. There is a one byte manufacturer reserved field which you can use for whatever you want (tied to your manufacturer ID).
There are reference implementations of the specification available for Linux to show you how it works, and there is no reason you cannot implement it on the mbed platform.
I'm using my iPhone to scan in a complex 2D barcode. Problem is, the iPhone camera doesn't do so well at very close distances (less than 3 inches).
I was wondering if there were a way I could affix a Bluetooth low energy "sticker" to a piece of paper. The idea being instead of using the camera to scan a 2D barcode, I could just put my iPhone near the paper and "scan" it.
I'm extremely new to Bluetooth tech, so it's quite possible that what I'm asking for is completely ridiculous. Please forgive me, if that is the case.
Unlike NFC, Bluetooth Low-Energy devices need a power source, so it's imposible to just "print" them. They need a BLE chip and a battery to operate. So while you could use BLE same way you use NFC (proximity-based actions), you won't be able to do it with just a sticker.
Register at bluetooth sig for manufactorer id. Then put manufacturer id in advertisement package 0xff with id (16 bit) followed by the data. You must be sure your length is correct or iOS can't decode it.
For NFC, your scanner must be pretty close to the tag. But BLE devices work within several tens of meters without any problem. This is like an active RFID chip.
Of course, you need a power source for it. But if you print this BLE tag to a piece of expensive equipment, the cost of the tag and the battery is not a problem. You can use a button cell battery to power the BLE tag up. Let is broadcast/advertise some info once a second. Of course, you have to add some security mechanism if you want to be away from any replay attacks.
I have an RFID reader which is ISO 14443A compliant. It is capable of reading Mifare 1k (s50), Mifare 4k (s70), and Mifare Mini (s20) cards. I want to know if the same RFID reader can read the cards which are ISO 15693 compliant. I am new with RFID and I dont know anything about the ISO standards.
Compliancy to ISO14443 does not imply compliancy to ISO15693. However, some reader chips can do both. If you can tell the model name of your reader, or the reader chip inside, it may be possible to tell whether it supports ISO15693.
Check with your reader manufacturer to see if it supports both protocols. Many do; but, you should double check to be sure.
Even if it does support both, it will likely NOT be able to do so simultaneously. Likely, you will have to toggle between the two protocols in order work with both types of RFID tags.
ISO14443 A/B and ISO15693 standard operate on the same frequency 13.56 MHz, and both have about the same read range when reading tags 5 - 20 cm, but from then on the similarities end.
They have different ways to access RFID tags and perform inventory, data read/write and different memory organization.
Because of the similarities some manufacturers provide readers that can handle both types of tags, but the procedure is different due to the different standards (so a software designed to read ISO14443 will not read ISO15693 and vice-versa).
As previous answers you will need to check with your manufacturer to be sure, but if you need a recommendation of reader with which I have worked you can try the IDTronic Desktop EVO HF or IDTronic Desktop EVO LEGIC. From my knowledge it's under 100 $.
Datasheet here:
Desktop EVO Reader Datasheet
the RFID reader ISO 14443A can not read the cards which are ISO 15693.
they are totally two different kind standard.
for rfid reader, i think you could first learn from this rfid news here http://syncotek.com/news/