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- เผยแพร่เมื่อ 26 เม.ย. 2024
- UHF RFID chips promise a lot and should overcome the two main shortcomings of standard RFID tags: A reader should be able to read a lot of tags in parallel, and it should be able to read them over long distances. Where do you think this technology would be useful for you?
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Yagi Antenna (bad): s.click.aliexpress.com/e/roYK5Yy
Strange Parts video: • How I Made My Own RFID...
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Thank you. I was researching RFID scanners and the moment I saw your video I was happy and knew I would find my answer. Your tests are always very practical and informative.
Glad it helped!
Cool! I wasn't aware of the uhf rfid technology. I really like the feature of being able to read multiple tags, especially like you showed it for finding stuff in storage easily.
I think this is an application often used. Libraries often use RFID in their books. But they use 13.56MHz, probably because it is cheaper.
Amazing!!! Thank you for taking your time to inform this awesome technology!!
Glad you liked it!
This was amazing. Exactly what we were looking for. Thank you!
Glad it was helpful!
I was hoping you would have a follow up to this unit with the more powerful one you showed at the end of the video.. none the less, thank you for your great content, one of my favorite channels on TH-cam.
Too expensive and not a lot of interest :-(
Thank you Andreas. You have aided my research into this technology with your comprehensive, informative videos once again. I wish I had some extra cash on hand to spend on a high power UHF reader haha
True, they are quite expensive.
Very informative again, thank you Andreas!
You are welcome!
We have a reader with a big antenna lent to us (at work) by a local company specialising in garages for office buildings, etc. It really works from a couple of meters away, very impressive. Maybe the cards are special as well, they supplied them with the reader.
You just needed stronger ( and more expensive) transmitters. These work up to 10 meters.
Where I was a contractor last we used RFID stickers for item and asset tracking. Everything was tagged and logged so whenever each case (containing as many as 300+ items) was sent to a customer we knew precisely what components, assets and equipment was going out at any one time, the RFID's contained loads of information as well as the sticker number, this included item, lot and serial numbers of each part, asset and case, a load of delivery numbers and customer details was added too. As soon as each case was ready to be shipped out it was slipped through a RFID reader/writer tunnel and that showed that batch had left the building. All this was 1-2 seconds at most. It allowed us to identify all parts, confirm each kit was complete, and that nothing had been removed. Left a nice paper trail for tracking should anything be returned or was a load item, it was returned and read using the same tools allowing complete tracking all over the world.
I cannot imagine the cost but it was an awesome piece of kit was but it did save so much time and money in lost hardware, especially as this was for medical equipment and implants.
This sounds really interesting and for sure saved some money in the end. Because searching or losing material is not cheap...
@@AndreasSpiess some of the components would have cost many months of my earnings to replace if lost, so the machine had clearly paid for itself in a matter of days.
Thats nice, can you refer which equipment + software you used ? I also want to try this.
@@dhiraj787, I no longer work there, however the software was integrated into Oracle so you never got to see who's software it was, I doubt you could buy it domestically though as it was clearly designbed for expensive major asset tracking.
Thanks for sharing
You are welcome!
Great video!
Thank you!
Excellent. You mentioned IFF on the last video, the Yagi is my choice for that. Too bad the enemy doesn't use Tags. Usually, the Yagi is placed just forward of the planar array to challenge while track, after which the GTWT adjust frequencies in pulse doppler awaiting a computer solution for a missile launch. Anyway I should stick to the class. Thanks.
You are welcome!
Thanks for for the video, a lot of great information and very helpful. I was wandering is the reader affected by obstacles?
For instance concrete, plaster, drywall ect even at close range.
Or is that also a function of antenna and output power?
As always with wireless devices all the things you mention influence the reach of a connection. Nothing different here.
Hello! Thanks for the video, it was an interesting watch. I was wondering, is it possible to extract signal information from the RFID reader? reflection co-efficient for example?
I do not remember. You have to consult its datasheet
I work with the Rolls Royce of RFID readers daily, the Impinj Speedway R420, which is extremely good at both reading a lot of tags and reading at range. But it requires specialized antennas and quality RFID tags.
The success of the RFID projects depend mostly on the choice of tag, tag placement and choice of antenna to achieve the desired read range.
We have detected RFID tags over 10 m from the antenna, so it is possible, but it requires a specific tag and antenna.
Thank you for sharing your experience. You are a lucky man! As always if you want the maximum you have to pay attention to the details.
Because this is a Maker channel I try to find things which are not at the maximum but affordable for the average man. Often such solutions exist. But sometimes I do not find shortcuts and we have either to spend the money or chose another project :-(
you are defintely rigth. Four elements will effect the reading range: reader, antenna, tags and the item you will attach the tag to.
Informative, as always...
Are you going to be including NFC tags and readers in this series?
I've just bought a number of NFC stickers which I'm using on technical books for linking to the code and author webpages for each book (where they exist). This saves me a lot of time searching through the book each time I find a useful technique that I want to follow up.
The mobile phone works very well but I'd like a separate reader connected to my laptop, so that I can cut and paste code snippets.
AFAIK NFC and RFID use the same technology. The newer chips are also called NFC. I will not cover those because they are not widely used in the Maker scene.
@@AndreasSpiess The ESP8266 'was not widely used in the Maker scene' when it first appeared...
The more I play with the small NFC stickers, the more ideas I get for them and the more they may feature in future projects.
The short range of NFC isn't really a shortcoming, but allows for a much higher power budget and stable operation. This allows strong cryptography to be implemented, like it's done with Smart Cards and ePassports. Storing a public-private key pair is only feasible with NFC. Also Sparkfun has a new breakout for the M6E-NANO. It's expensive but very hackable, in contrast to the Chinese Wiegand compatible UHF readers.
Thanks for the information. I thought that the UHF chips were also "secure", but I have no know-how. Concerning the Chinese readers: The UHF ones also have an SDK and should be quite hackable. But maybe less of a "community". The Sparkfun is also less powerful. So I did not decide yet. It is an expensive decision.
@@AndreasSpiess Most UHF tags are ISO 18000 EPC compatible. The only "security" there is write protection and software tag disabling. However there is no cryptography involved. Everyone in range can query the tags and everyone can answer the query without authentication. For secure NFC, take a look at MIFARE SmartMX or DESFire and their feature sets.
Hi, i really like your videos! Could you maybe make a video about accuracy of chinese BME 280 sensors and maybe how to fix them? It seems that most of them arent accurate at all. I ordered a bunch from different sellers and they are all off by ~3°C and the humidity is far from the real value. In your previous video about this sensor i had the feeling that yours also reads too high values. I could also send you one of the faulty things.
I did not use these sensors quite a while. If they are defective, I would start a dispute.I also have no precise thermometer to tell which is right.
Thanks for your analysis on this alive and kicking subject. I would like to get more depth in the background of how UHF and HF work and if you can advice more that would be great. We are working very actively in this field converting UHF & HF tags into all sorts of workable formats like labels and tags and tickets to connect items and make them part of the Internet of Things. In this we have some challenges and need some help to overcome, Thanks Peter - LabelTech
RF antenna design is an art. You find specialized engineering companies with the needed soft- and hardware to support you. This is too special for a TH-cam channel, I think.
Thanks for sharing :-)
Interesting as allwayes :-)
Thank you!
nicely explained. investing in a high end antenna with a signal booster is not a bad idea. I own a high end antenna as I use them on my wifi router to get free wifi. good antennas should have vast applications for diy projects, not just for RFID. maybe you could use them on your lora gateway to extend the range even further. I want to use this technology to make a key tag, so when I loose my keys again, I can find them, only if I point in the right direction and have better antenna, lol
I think, that LoRa and RFID antennas are different. This is why I ordered a special RFID antenna to compare.
Learning a lot here!
Are you gonna cover active RFID in the future as well? :)
I have no such plans
Hi, thanks Andreas for this very useful information!
i would like to ask a question.
Does the reader, even the long-range one, read the tags in directional way? i mean, the reader and the tag should be in a straight line to be able to be read?
And, when the spec says that the reader is capable to read up to 15m, is it a radius? or just a 15m straight line from the reader?
i hope you can answer this! many thanks and good luck!
These devices work best with a line of sight. And most devices use directional antennas. So they only work in one direction.
@@AndreasSpiess Really apreciate your answer! can i ask something again? I bought a middle-range UHF RFID reader. It came with the SDK documentation. However, i seem to really stuck to get the data read by the raspi 3 connected to the reader. I tried to find a library or a snippet of codes, but nothing gives me a light. Do you have any reference of how to code the reader so my raspi 3 can get the tag's data read by the reader?
Useful video 👍 Excellent 👍
Thank you!
Did you see tgelast Hak5 episode Andreas? Was on cloning RFID tags. Love it. I need an antenna analyzer.
I can't find that episode, can you share the link?
@@Livefreeman th-cam.com/video/IHyM7o-OVqA/w-d-xo.html
They had a little longer to explain the simple copier I used for the 125kHz chips ;-)
@@AndreasSpiess I left a message that you had done it first. Go on you Andreas please have a wonderful week mate.
I would say the range of the desktop reader is intentionally low. You would use a reader like that to scan cards into a PC based access control or sports timing system. If it had a long range it would be useless, as it would pick up every (unwanted) card in the room!
You are probably right. I ordered a different antenna (smaller). Maybe this helps a little.
Then sort the read card
Thanks for this helpuf video Andreas! Do you think it's possible to control with my own software (C or C#) instead of the SDK provided with the reader?? I have been trying to find a similar reader but with an API for C# and I haven't been able to find anything for a reasonable price. Thanks again!
I do not know if the software can be changed.
Great video. I'm trying to figure out if I can use uhf for cataloging a small book cabinet. Ignoring the range for now, is there a limit to the number of tags a reader can read? 20? 50? 100? More? Any idea?
A reader can read a lot of different tags (millions). But not at the same time. I do not know how many tags can be read in parallel if they are in the reach of one sensor.
Hi Andreas, would you still advice this UHF reader for maker projects on an ESP32? (Or Raspberry Pi?)
Maybe combine them in a Weight Scale project. So the foodprint of the antenna is known then. What would be the maximum distance of the tag above the scale be?
I think I showed how far it can read: about 10 cm
Hi, Very Good and Informative Video. Can you please clarify one thing to me. I have copy machine and I know that this machine can read / write 10 Frequencies. My Question is Do I need to have 10 different writable cards to copy all these supported 10 frequencies? And can the device copy long range access cards? Thanks in advance
I do not know. This needs thorough hacking by a very knowledgeable person.
Hi
Great video.
Were you able to duplicate a passive UHF RFID tag with the $60 reader/writer you purchased?
No
Hello Andreas, nice work, I loved it. I have been trying to find a reader so I can drop some tags in it, and once a day read them all through my WiFi network. Do you know where or how I can accomplish this task? Thank you.
I only know what I presented in the different videos about RFID
truth will set you free thanks
Would like this for tracking horse and sheep on property. Would require solar powered readers connected to some radio back to house then wifi to phone. Think lora might be a better option.
You are right. Lora has a much bigger range, which is probably necessary for free animals
Hello, I recently found out that there’s possibly a cheaper alternative to UHF: ISO 15693 tags (such as the ICODE SLI/SLIX/SLIX2). These are HF vicinity tags, which can be read from up to around 1.5 m, and the PN5180, which is a compatible reader, can be bought for less than $10, and the tags cost 15-20 cents each.
I haven’t tried it, and maybe the antenna is also a limiting factor here, but it’s worth a try, and there isn’t much info out there about these (there are a few videos from the same channel, but I don’t see any videos on their range), so it’d be interesting if you could do some videos on them.
These are HF tags. 1.5m maybe with a very strong transmitter? I doubt ;-)
@@AndreasSpiess I agree with you. It will a very good reader if it can reach 1m.
You may at the end produce a good DIY UHF reader, but it is another story when it comes to applying the UHF tags on different objects, especially metal parts.
I can imagine that tags will not work properly in the neighborhood of metal.
I purchased a similar antenna years ago from China, but didn't forget about it! I works well, but I would like to see the results on a VNA!
The question is: What is "well"? If you get much more range than with a normal antenna and if it differs from back to front, then it is "well".
@@AndreasSpiess
Yes, it has greater range than a standard dipole. It is extremely directional. It is labelled "Model: LWD-900-7, Freq: 824-960MHz, Gail: 11dB, Made in China".
Have you seen or used YagCAD?
FYI: Things "work well". Only a person "is well"; it means they are not sick. "All is well". (Stupid English doesn't always follow the rules).
Great series on RFID!
you are use it for what kind of application?
It is very important to note, almost all early RFID standards were never designed to be a long range interrogation platforms or devices.
Today, the needs are very different. Vehicles that can unlock / start when the key fob is within 15' was never a requirement until now.
Transportation container tracking at high speed is now the norm.
All of these examples essentially use the same RFID architecture. Some have internal power supply, others have none.
The issue of power, frequency and pulse length must be fully integrated with precision many take for granted with "standards". Quality Control is almost non-existent with many Chinese suppliers.
Many of the vendors are reselling tier 1 components that have been rejected.
This is not to say all Chinese based suppliers are bad. Many are very good. This is particularly true of those based in Shenzhen. Even so, it's buyer beware unless you establish a relationship with your vendor.
The Gap is closing but is still a few years away from achieving consistent QC given the number of suppliers of components that exist.
Using a Yagi-Uda antenna should work, if designed / tuned properly and matched to an appropriately sized connector. I'm not sure if yours is. Something isn't right.
You are of course right. But the Mobile Phone standards also were not designed with the Smartphone in mind. This happens all the time. And this is maybe we love our profession. Always progress...I ordered a special RFID antenna to compare. And I am still evaluating a stronger reader (it is a costly decision).
What camera have you got under cover there at 3:11? One of those Eakins ones or similar?
No, Unfortunately not. But I have an Eakins on order :-)
thank you.
You are welcome!
amazing
:-)
Can you increase the range of medium frequency (13,56 mhz) RFID tags to 1 or 2 meters? By adding power source or creating transmitter from scratch? I can’t change receiver, but it’s a simple one (ISO 14443) without any encryption.
You do not only need higher power but also a bigger antenna. 1-2 meters is a lot for this technology.
@@AndreasSpiess I can’t modify the receiver part, but I can do whatever I want with tag/ key part of the system. I can provide power source, I can modify or change coil, I can buy or build different active transmitter (if it’s possible). I don’t know if something like directional “antenna” / coil exists or could be done for this (I can point the device towards receiver)? If 1-2 meters is to much, could anything be done to make this work from at least 50 cm? Do you have any source of information could use to make it work?
Maybe the problem is to use the same frequency to transmit power and data. We could make devices picking up power by induction from the power grid and transmitting data on a clear channel where a sub mW. power would be enough to be picked-up a meter away.Of course it wouldn't work in unpopulated area (desert, ocean) but those devices are usually used in buildings where 50/60 hz is leaking everywhere.
Due to the low frequency and thus the wavelength (in the order of thousands of km), you'd need large antennas to receive significant amounts of power. The dipole antennas in the tags really only work with ultra-high frequency.
@@graealex That's why I said induction, with a magnetic loop rather than a dipole antenna.
@@graealex you could be right I haven't measured how much energy a credit card size loop could pickup, although picking-up a few mW. seems reasonable, but still if the power was sent in a different frequency like let say in the microwave oven range 2450mhz and the data received in a clear UHF channel it would be lot easier to pick-up.
@@johnkubik8559 Then you need a few thousand turns of wire, and a very large capacitor because you need DC for the chip itself and also to power the transmitter at the different frequency - 50 Hz means that there is a significant amount of time to bridge. The way the dipoles in UHF tags work is that the two halves have a transistor between them, and the chip can load the dipole by switching the gate of the transistor. Also the transmitter would have to have a very good clock source on-board to produce a coherent signal.
@@graealex The chip need a mW or two to transmit, cmos is very efficient, either you could get that power from AC induction or from microwaves and I'm not talking about putting a magnetron in the receiver, a watt or less would light up every RFID cards in a meter range, the problem is, if in the frequency you need to send milli -watt's of power and listen to nanoW. of data from a chip plus antenna, which has to be keep in the penny's range. The trillion tags+ market is in the daily shopping store replacing bar-code which are basically free has something has to be printed on all the items you buy, to go to a cashier-less store where you just push your shopping cart through a scanner and pay for what you bought with 100% accuracy. The market is present, a few hundred thousands stores worldwide need it, but the current RFID's tags are not reliable enough to be used. In this case we have a problem requiring a solution while when we see a 3 cents micro controller we have solution looking for a problem.
Where did you purchase the rf vector impedance analyzer n1201sa?
I also did a video about it
Do you think the uhf reader you bought would work at longer ranges if your antennas were not faulty? I have the same exact reader and thinking of extending the range to 1meter (not sure if I should get an antenna to do it)
You can try it. The chance for success is not big, I think.
Record when people are home , control lights to turn on when Ur near the light , record when people on site at work loads on uses , record if a car or truck is at base , open remote gates when I get close :) endless use
You are right. We can hope that the price of the readers will come down. This would open many applications also for Makers.
Thanks for this Video ! But... how to know if a reader can read simultan several RFID or not ??? I did't got this point ....Thanks for your support !
I assume you have to try it. But usually it should work.
I think need strong magnetic field for producing power for RFID tag. EMF we should keep it in mind. Is that right?
The tags are very sensitive. The output power is limited in all countries. So the tags have to work with this power
@@AndreasSpiess I'm thinking that electro magnetic field may help to power the tag. Reader also transmitting RF to carry the signal from Tag. Just expanding the antenna may not give best result, i think reader needs amplifier for receiving and boosting antenna may required.
Here i mean that strong reader required.
Take these point of view as am a student.
@Andreas Spiess Can you use the UHF 18000 RFID Reader also for lower frequency cards to read ?
No
what do you suggest for Rc522 ?@@AndreasSpiess
Maybe you watch my other RFID videos?
thanks again@@AndreasSpiess
Also sports RFID has grate range. Similar to tato tag you have and have about 3-4 meters of range.
This is what the strong readers promise.
have you done any RFID sports solution? I am interested.
Hi, that project looks great... Do you know if it's possible to connect it to a Raspberry Pi and send the data via Bluetooth? Will I need the SDK? Or does the software come to develop it? TY
I do not know :-(
I have an EPC Gen 2 reader/writer. It can go to about 7 meters depending on the tag used.
Which one do you use?
@@AndreasSpiess Sorry. I forgot to mention that the device I have is much bigger in size to serve it's purpose of reading multiple tags at farther distances. It's an Astra-EX.
I think it's circuitry is as big as the desktop reader/writer's but uses a bigger directional antenna.
@@152drake164 LoL, you cann't compare a desktop reader with an integrated reader. If you are interested, we can exchange more information, my email: chris@syncotek.com
There should be battery-powered tags, which sleeps most of the time, but when tag detects a reader signal, it produces much more powerful signal and reader can hear it from a larger distance.
They exist and are used for special applications. But they are bigger and more expensive.
@@AndreasSpiess I think he is talking about active RFID.
Since RFID card have no power source, It need a magnetic field reaction from RFID reader to generate electric power, Just like transformer , the RFID reader act like primary coil, RFID tag as a secondary coil. The magnetic field are quite sensitive by distance.
The UHF antennas do not work with magnetic only fields as the low-frequency ones (shown in a previous video). They also do not use coils, they use antennas.
This is true for LF and HF tags, you can even see the coils in the tags of HF tags. The antenna and the tag are inductively coupled. UHF is a different can of worms, they work by reflecting the incoming RF.
What interface does the reader use? Is it a usb-serial device, hid, or something proprietary? I'm curious if it could be used with custom software
On the GUI you can see settings for COM port and Baudrate, which is set to 57600 bps, so I would assume it's just a serial device.
Along with the sample program to talk to the device, they also give you code examples so you can issue the commands from your own program.
I think it's a usb-serial device. If you need information for HID interface, you can email me at chris@syncotek.com
BTW: Using a better antenna is one way, the other way ist using booster jackets oder active cards. Wie use such cards for car indentity management. They have a range about 5-10 Meters but, those infrastructur is, as you said, not for the common tinkerer :-)
You are right. Active antennas solve most of the problems because then we are back to normal receivers with very low energy requirements. But they are bulkier and probably also more expensive :-(
Noticed you were wearing gloves when operating the spectrum analyzer. Is there any reason for the gloves, like the spectrum analyzer being dangerous in some capacity?
No need for gloves.
What other antennas would you use and can you put these tags on wild animals to track?
Shipment containers or on devices and tools to track. THe logistics area is a comon area where UHF rfid is used
Have connect the desktop uhf to arduino,,the reading is changes sometimes,, not always in 20cm ,,sometimes need to be very close like 5cm to get the reading.. but still quite usefull.
Thank you for your feedback. The distance seems to differ from tag to tag.
For desktop reader/writer, mostly use for encode tags. So the distance is not the main concern in most cases. The antenna in a desktop reader/writer device is quite small. If you want to exchange more information with me, please email me at chris@syncotek.com
Can you read the UID from whatever UHF Tag with the first device you shown?
Here you see the ID: th-cam.com/video/xaLSkyGTh2k/w-d-xo.html
Hi, amazing content. I have questioni can this UHF RFID reader read 13.56 Mhz or 1k mifare cards?
No. Maybe you watch my other videos on RFID?
did you get the expensive directional antenna? Is there a video with it?
So far I did not continue with this project. I had no pressing need and the components are quite expensive.
can you do a video where you make a directional antenna that actually works
Maybe. Not decided yet.
So can you clone a simple UHF tag with this device and software?
Maybe. I think it depends on the application. At least you can write some numbers on it.
Where did you buy the first rfid tag that you used during range testing?
On Aliexpreess
@@AndreasSpiess Could you please give me the exact link? because it's hard to find that exact tag
Hi! Where did you get the software you're using (UHFReader09 Demo Software v1.2)?
I do not remember. Probably from the vendor.
@@AndreasSpiess It's really a crazy mess when dealing with products from China. No manual, no drivers, or software. I'm in the process of chasing these from the seller on Amazon but they don't seem to have any clue. Difficult to find the manufacturer of these generic UHF RFID readers. If anyone else has any tips, it would be helpful!
Hi Andreas! This type of RFID cards (uhf) are capable of being clone? Do I need a Chinese “magic card” in order to make it work?
I do not remember. This is an old video :-(
Can you do video about NFC desfire?
I did a video about the 13.56MHz RFIDs. Desfire is one of them. But I did not cover them in detail.
What's the desktop multimeter you are using called?
UT804. You should find a link to my lab equipment in the video description.
Es hätte natürlich gereizt, zu wissen, was genau an der China-Antenne so schlecht ist. Gabs keine Chance, den Schleifendipol zu korrigieren? Oder den Schleifendipol alleine zu verwenden? Was ist denn unter dem Schrumpfschlauch?
Wenn ich das Display des VNA bei 10:42 so anschaue, scheint die Antenne bei 1 GHz zu liegen, der Dipol ist also erstmal zu klein. Vielleicht war die Yagi auch ursprünglich als GSM-Antenne gebaut worden?
Leider hatte ich keine Zeit für witere Analysen. Die Antenne war so angeschrieben und angepriesen. Das hat mich auch geärgert, so dass ich nicht viel Lust auf Analysen hatte :-(
Sie war vermutlich für GSM gebaut.
Aber sie war auch bei 1GHz grottenschlecht.
Wuerde mich auch mal interessieren wie man das ordentlich analysiert, weil ich eine gekauft habe, die genauso aussieht wie deine und ich kann mir vorstellen, dass die auch ziemlich schlecht ist...
What do you think about m5stack JRD-4035? Did you have a chance to see it in action?
I do not know it. I would check if it has a range which is convenient for you. I think it will be pretty small.
@@AndreasSpiess they promise huge 1.5 - 2 meters. So, may be it works at 20 cm? :)
Oh, regardos, versiona portuguesa says and shows that it workos on a distaciao :) th-cam.com/video/IgN9sB926-c/w-d-xo.html
If the UHF rfid switches the receive antenna the same way as LF ans HF tags, why can it read multiple tags simultaneously? Seems to me that it would be just as confused. How would it detect this from 20m, 60 wavelengths? Could they be making an subcarrier?
It does not read simultaneously, but much faster than HF tags
Andreas, thanks for this video! Very scientifically explored (nice spectrum analyzer!) and very well presented. Now that you've found the shortcomings of the internal antenna, and also the Chinese junk (that's redundant), I would love to see another video where you pursue a better solution. Clearly we need more than 13dBm. I hope eventually to make a system that will read at least 10-15m distance, a long leap from the 15mm-15cm that you showed here.
You can buy such systems ready-made. They are not cheap, but they work and I would not want the hassle to build one on my own because also the parts are not cheap.
Can this Tecsun AN-200 AM/MW Rotatable Tuneable Loop Gain Radio Antenna(No Battery Needed) work for a rfid antenna or can this antenna be modified to work? And is it possible for you to show how
This antenna does not work on those frequencies
@@AndreasSpiess thank you
Can you suggest me a affordable Mixed Signal Oscilloscopes Frequency Meter/scanner? Like I see the one you have in the video which is 15k USD.
I did not evaluate oscilloscopes for quite some time (I even did not choose the one I have). So I do not know.
I didn't finish the video yet, but I believe we can look at the RFID based "EasyPass" technology to see how the distance barrier was overcome.
Easypass seems to use UHF RFIDs
@@AndreasSpiess There was a TH-cam video of a Taxi driver in New York City who altered his device to beep every time it was activated. The thing was going off every few blocks, nowhere near a bridge or tunnel which is what EasyPass is designed for.
Please suggest me a 12m range RF reader which is also compatible with Arduino....
I am asking for car parking application.
As you saw, mine only had a range of 12 cm. So I do not know.
nice! I got the same reader but I cannot find the sdk! where did you download the sdk? uhfreader09 demo software v1.2?
I got it from my supplier.
yheaa that doesn't work... :)
Do you need it?
yes please ! my supplier does not answer my request for the url so I tried to search for it but had no luck..
It's here for a few days: drive.google.com/file/d/1d8Xx2n3Rdevq97k3UroU25j1EFFhatgE/view?usp=sharing
Hello, would you be able to speak with me about the content you went through? I have been researching and looking for a solution for our business and I could use some of the knowledge you have. Im a software engineer for 20+ years but I have little experience Rfid and the associated hardware. Would you be willing to help?
TH-cam is only my hobby. Unfortunately, I have no time for consulting :-(
Hello ... Greta video. I have just messaged you on twitter. I have a question about washable RFID tags. Thanks
can you drop the link for the UHF reader
I updated the link to a similar reader I used in the video.
i wonder if a patch/quad panel antenna would work? Seems like it would be easy enough to make, and you have the right tools for testing/tuning! I wonder how much polarization of antenna is important (like in FPV stuff) as these cards can be oriented in many different ways in the field.
You might be right. This is why I ordered a special RFID antenna. We will see the effect...
@@AndreasSpiess A nice document about DIY 10dB gain panel antenna's is found here:
www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-10742010000200003
More about maximum ranges of tags is here: skyrfid.com/RFID_Range.php
You can also use a small Yagi antenna that realy works. I found one on www.flytron.com/antennas-filters/125-900mhz-3-element-yagi-antenna.html.
I'm still searching for an affordable UHF-RF-ID reader to test with. I need a 10 meter range with not to much equipment or big antenna's, so for me a flat Yagi can be a solution. At this moment I think the readers are to expensive for just playing around.
But i also expect that the units with the SMA connectors realy have a better performance than the desktop version you used.
If someone knows a effordable unit, that would be nice!
That is why i like your channel, you make a lot of comparision so we can skip the expensive try en error phase....
entendí un poco pero necesito saber sise puede poner una antena yagui usando la frecuencia 13.56 mhz para leer una tarjeta rfid de la misma frecuencia a unos 6 metros de distancia
Maybe you search for the dimensions of a 13.56 MHz Yagi. The antenna itself is probably longer than 6 meters.
@@AndreasSpiess podría decirle las especificaciones de la antena para ese tipo de frecuencia
Please put the medium link in desc.
What is the medium?
for what do u use this? and could you name the tags?
Each tag has a long number.
@@AndreasSpiess jeah but could you link a name to each number like they do in clothing stores (at least in swizerland) so that you can stich them on your clothes and name them diffwrently like pullower trouse black and so on would be a nive feature
@@badacconosu If you're scanning them wanting names you can have a simple database that matches the numbers to a certain name. Same as barcodes do at stores.
I like the guy with the Swiss accent 😂
:-)
Can you correctthe 866 mhz antenna with the equipement that you have? Do not just throw away the fuccc king antenna.
you bought such a big antenna and forgett it xD
Do not forget: I am an old man ;-)
Have you tried to see the max number of tags it can read together?
No, I did not try it.
Do you consider UHF Anti-metal tags?
No
Can the RFID reader that you use be connected to raspberry pi?
I think so. It has a USB interface
@@AndreasSpiess thanks, i had a few question about uhf RFID, is that any possiblity for identify the position of the item such as book from a bookshelf?....,Becuz as far as i know that RFID only can read the tag randomly no matter where its placed
@@lierkiboy1736 No position info AFAIK
1:20 comic sans trigger
How many of us can identify with "... a long time ago I bought X, and forgot about it... " ;)
:-))
How can you be sure the Chinese VNA isn't lying about the Chinese antenna? ;)
Because I checked the Chinese VNA with an American VNA. Maybe both lie, but for sure not the same way...
Is it able to read the credit cards?
No.
@@AndreasSpiess NFC device has internal antenna. Is it replaceable with external antenna.
👍👏
:-)
Can you read and write uhf?
For sure you can read them. And the ones I had were also writeable.
(264/(264+1))x100=99.623%...that means something
??
@@AndreasSpiess That was your like/dislike ratio when I saw the video. It´s a complicated but much more accurate way to say "nice video" involving also the audience.
Aha. Thank you! This ratio runs at 98.7 average in the moment for all videos.
Strange readers in warhorse pda has much more range.
More than 10 meters?
For desktop reader/writer, mostly use for encode tags. So the distance is not the main concern in most cases. The antenna in a desktop reader/writer device is quite small. But for PDA reader, it will be a different story for both RF power and antenna. If you want to exchange more information with me, please email me at chris@syncotek.com
I want to implement UHF RFID in my software for id detection. and send a message if correct id detected. anyone, please help me if you have an idea about it.
Google is your best friend. I am sure you will find a way to create what you want or need.