Radio Frequency IDentification

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1answer
5 views

UFH reader Gen2 and tag G2iM+

I'm planning to build homemade UHF reader but I'm a little confused. I've selected reader IC and tag IC. The reader used EPC Gen2 communication protocol. I really like NXP tag IC. But they use ...
0
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1answer
29 views

Increasing the range of a UHF RFID reader

Okay, so I've got an UHFReader18 UHF RFID Reader from China, which can be seen here: http://www.aliexpress.com/store/product/Popular-800mm-UHF-RFID-Desktop-Reader-6B-6C/413622_598715812.html. The ...
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0answers
15 views

Recommend: rfid tag/reader with 1m range? [on hold]

Can you recommend an RFID tag/reader solution that allows for reading tags as far away as 1 meter (3+ feet)? The application involves tracking people as they enter rooms so the readers will be placed ...
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1answer
35 views

How to detect several agents within a radius, what is the best and easiest way to do it?

I have a room with 30 objects which may or not be present, and I want to be able to detect which objects are in the room. My first idea was to attach a RFID tag to each one of these objects and have ...
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0answers
22 views

Looking for datasheet on 2 ST Micro ICs re: RFID

I have an RFID reader as a separate PCB (purchased from seeedstudio: item) of which I wish to incorporate the key ICs into my own PCB. Apart from a 16Mhz crystal and the necessary caps and resistors, ...
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0answers
33 views

RFID Reader RC522 and FPGA Altera DE2-115 [closed]

I am trying to connect the RC522 RFID reader to the FPGA Altera DE2-115 but have no idea how to transmit the ID sent from the RFID reader using verilog. Right now I haven't been able to establish any ...
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3answers
54 views

Determining distance between wireless sensors - sailing project

I'm looking for a solution which will allow me to determine the distance between two points, one of which is static and the other not. It's part of a project I'm working on which will involve the ...
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0answers
37 views

Arduino: The program exited the loop early and execute setup() repeatedly [migrated]

I'm working with Arduino Uno, Adafruit PN532 NFC/RFID Shield and along with other modules. I'm posting this test program because I found there's conflict with the serial output while writing code to ...
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1answer
27 views

Measuring Stride distance wirelessly

I'm trying to fit two sensors in a shoe each (such that each shoe has one sensor). their purpose being to calculate the stride length of a person, as a person takes a stride, the distance between two ...
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2answers
57 views

Set RFID frequency

I hope someone can help me with a doubt about the way RFID works, regarding communication with RFID tags. I am working with a Motorola FX7400 reader, I know it works in a frequency range (902-928 ...
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4answers
66 views

RFID tags inside metal items?

Is it possible to use an RFID tag inside a stainless steel enclosure? I am looking for a way to uniquely and easily identify a sensor. An alternative possibility is a laser engraved bar code.
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0answers
14 views

Connecting RFID reader over USB [migrated]

I just purchased the RFIDRW-E-USB RFID reader from Priority 1 Design (see this page, datasheet available in PDF form.) I have tried to make it work on my computer (Ubuntu), before plugging it to my ...
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0answers
115 views

Getting to work RFID-RC522 reader / writer with Teensy 3.1

I am trying to use the RFID-RC522 reader / writer together with a Teensy 3.1. I cannot get it to work. I always get the error: MFRC522 Software Version: 0x0 (unknown) WARNING: Communication ...
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1answer
85 views

Need help isolating source of interference

I'm pretty new to electronics, but have been successfully working with a Spark Core (www.spark.io) and some simple drivers/circuits for now. That said, I've run into a problem. I have a Spark Core ...
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1answer
39 views

Safety advice for best EMF detector and body shielding for UHF RFID reader

I've got a UHF RFID detector (860 to 960 MHz). I'm just getting into configuring the power output but I think I've been testing it at about 20dBM, I might want up to 30dBM. I'm concerned about my ...
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1answer
41 views

RFID and NFC how they work? [closed]

could some one explain me these technologies? I understand the main difference is the strenght of the signal. If im trying to automatically send an alert to any smartphone (able to receibe it) can i ...
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0answers
60 views

Self tuning 125khz RFID reader

I have a RFID reader based on the EM4095 IC. I would like to make the reader self-tuning so it can handle varying inductance in the antenna due to reading tags near metal. I had thought of using a ...
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0answers
68 views

How to increase the read range of an active NFC tag?

I want to read a NFC tag at a distance of 1m from my NFC enabled smartphone. Is it possible to do so by enhancing the antenna of the NFC tag (not the one on the phone). Size of the NFC tag is not an ...
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0answers
64 views

How to use Mifare RC522 RFID card reader without mains power?

I want to make a simple home security system. I'd like to be able to have an RFID card reader near my door. All members of the family will swipe in and out, and when everyone is out, the web cams will ...
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3answers
75 views

Continually reading an RFID Tag

I am attempting to build a system which stays active when an RFID tag is present and then deactivates when it's removed. RFID readers seem to have an output that fires once when the tag is in range ...
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0answers
84 views

Cloning a rfid tag with arduino

My school uses RFID tags to turn on air conditioners and only professors have it. This is to prevent students leaving the air conditioners turned on. I've been thinking about cloning a tag just to ...
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0answers
64 views

RFID reading / sniffing demonstration at a live-event

In the context of a live-event, we want to demonstrate how easy it is for someone with the right equipment to sniff RFID devices, including clear-text information. Our idea is to hide a RFID reader ...
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1answer
137 views

Relation between SPI, clock rate and data bits in microcontroller

I am working on a project which requires a UHF RFID Reader IC AS3993 having an 8 bit Reader MCU. And an externally connected LaunchPad (SimpleLink LAUNCHXL CC3200) for data transfer which works at 16 ...
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1answer
101 views

Determine the working frequency band of unknown RFID chip

I have a passive RFID chip from which I would like to scan the ID. I have a standard USB RFID Reader, but this doesnt print out anything. This reader scans the 120–150 kHz range, so the chip must ...
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1answer
57 views

Passive RFID transponder timing system

I'm looking to build a timing system base on passive RFID transponder. This is how I see it : An antenna to "question" the tag An antenna to receive tag unique ID A tag with unique ID I would like ...
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1answer
79 views

125kHz RFID output interpretation

I'm using the RDM6300 125kHz reader module in combination with Arduino Uno to read my tags. The tags themselves have their ID as a label. When I then try to read the cards, I receive another ID as ...
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1answer
109 views

Is it possible to emulate Mifare Ultralight? [closed]

Is it possible to emulate mifare ultralight disregarding the specification, so that electronic tickets can be infinitely used? Mifare Ultralight has 16 pages with 4 bytes each. There are control bytes ...
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0answers
59 views

Is it possible to emulate RIFD ISO 15693 UID tags

I found that is it possible to emulate ISO 14443 and found ICs that does perform that function (Example PN532 from NXP), but I am struggling to find an off-the-shelf IC that does ISO 15693. So before ...
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1answer
70 views

Can I use a RFID reader to check if there is an physical obstacle between it and the tag?

I am trying to create a cheap system that check if there is someone sitting on a chair. I would like to know if there is someway I can configure a RFID reader so it identifies when there are ...
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0answers
62 views

Theft alarm for retail?

Say I have a coffee shop with a bookcase filled with books for people to read for free while they drink their coffee. Now say that I want to stop people from placing the book in their backpack and ...
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1answer
74 views

What kind of RFID reader do I need for library books?

My local public libraries are switching to RFID tags for check-in/check-out. I'd like to get a RFID reader to read these tags myself, but I don't know what I need. The stickers they put in books ...
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2answers
170 views

DIY passive RFID? [closed]

I'm interested in building my own "DIY" RFID scanner and tags. For the scanner, I think I would just need: Transceiver Some kind of hardware polling mechanism to have the scanner scan, say, every 2 ...
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2answers
79 views

use RFID ( or what else? ) for a broad distance measurement in 1-2 meter wide area

Let's suppose we have a suitcase containing some RFID tagged objects. With a reader contained in the same box, I periodically poll the content in order to check if something is removed from the ...
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1answer
65 views

Tuned circuit value switching

I've been playing around with some LF RFID tags and want to create a EM powered sensor tag (ie, a normal passive tag). Ideally the tag should power up for a couple of mS, take a sensor reading (which ...
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0answers
103 views

Building RFID 125kHz Smart Shelf

RFID 125kHz card readers are very cheap (< 5$) and very simple (USB Plug & Play). Is it possible to chain / multiplex 20 readers to create a very accurate plug-and-play smart shelf? What are ...
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2answers
146 views

Position tracking system for frisbee

I'm trying to build a smart frisbee for use in Ultimate. I'd like to be able to track the position of the frisbee in a playing field with pretty good accuracy (within ~2ft). GPS is a possibility, but ...
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1answer
278 views

Detect presence of Passive HF/LF RFID TAG with BT 4.0 (NFC not supported) [closed]

Trying to understand if with current capabilities of Bluetooth 4.0 / Smart / BLE, is it possible to detect a passive RFID TAG, within a very short range (less than 5cm). New phones both Android/iOS ...
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1answer
57 views

Find out about RFID type

We are using RFID access badges at work. How can I tell what kind of system is at place (frequency, Mifare derivative). I don't have any experience with RFID systems, which one would be the most ...
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2answers
598 views

Battery life with a CC3000 WiFi beacon

We're experimenting with using a WiFi module as a battery driven beacon or RFID tag. The cheapest module out there with plenty of documentation (thank you Adafruit) is the Texas Instruments CC3000. ...
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1answer
37 views

Determine which RFID is closer

Apologies if this is a simple question, I'm very new to hardware. I'm wondering if using PN532 NFC/RFID controller (http://www.adafruit.com/products/364) I can determine which of two RFID tags is ...
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0answers
39 views

Detect unathorized access in RFID security system

I have a question about RFID security system and tags when implemented in traffic monitoring system. The scenario is a 1) Reader and a 2) barricade which is some 2 meters ahead of reader. Now how do ...
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2answers
155 views

RFID data transfer rates?

I'm learning about RFID and am trying to figure out what the data rates are for the different types of RFID technologies. I've learned that there are three different frequencies tags and readers ...
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1answer
398 views

Design RFID tag that works with Bluetooth

Is it theoretically possible to engineer manufacture a RFID tag that works within the Bluetooth wavelength range allowing a standard booth-tooth device (a phone for example) to power and pick up data ...
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2answers
360 views

Can an iphone/android cell phone communicate with RFID?

Is it possible for a cell phone to communicate with an RFID chip? I'm looking for a low-powered solution to turn a device on/off wirelessly, using a cell phone. Example: phone sends signal to RFID ...
4
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5answers
1k views

DIY NFC boosting antenna for a mobile device

I am very new to this. I'm a dentist trying to improve client flow in a busy office. I would like to develop a cheap proof of concept for an NFC enabled client tracking system using a hacked mobile ...
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2answers
166 views

Can the range of a monostatic RFID antenna be increased using an amplifier?

How does an RFID reader monostatic antenna both transmit and receive at the same time, are they CW or pulsed? I would like to extend the read range of a reader by using an amplifier between the ...
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1answer
161 views

RFID system to detect a specific object 50 cm away

I am prototyping an RFID system that can detect a specific object about 50cm away. I've tinkered with the idea of proximity sensors but the issue there is the inability to strictly trigger when a ...
0
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1answer
83 views

125 kHz RFID Antenna Measurement using CRO - Passive Probe

I have a coil inductor and a capacitor in parallel set to the resonant frequency of 125 kHz for receiving RFID. There is no issue with the operation of my circuit but I would like to measure the ...
4
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2answers
231 views

Simple RFID reader - AM demodulator not working

I'm currently working on building my own simple RFID reader. I've already build a small circuit in which my coil is fed from 5V current source or is connected to ground dewpending on the 125kHz square ...
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2answers
115 views

Is it possible to provide security in Passive RFID tags?

I am working on a project, where I am using RFID tags, and RFID reader for some sort of authentications. But after searching for a while, I found that passive RFID tags can be cloned. Is there any ...