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- Опубліковано 6 кві 2019
- Let’s make that our Arduino can read animal RFID tags. Then cats or other animals can be part of our home automation. Or maybe you want to get chipped?
Links:
Sketch: github.com/SensorsIot/Animal-...
Small reader: s.click.aliexpress.com/e/b8NUZL6C
Middle reader: s.click.aliexpress.com/e/ZL2u5J2
Long-Range reader: s.click.aliexpress.com/e/bWtfIebq
Arduino Mega clone: bit.ly/2OLilA2
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
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I like it how you also protect the cats privacy. nice
you could probably get his address and phone number with the tag code ...
@@nick5625 yes but I think it is a nice detail to blur out the number and posting it online. Yeah if you really want to know it you probably can find it out but thats with mist things....
In Switzerland, it is quite easy to find an address. We have a public telephone directory ;-)
I have sold commercial readers for the cow tags for years. My customers use them in an automated data collection system to identify the NEXT cow passing through the entrance to the milking parlor. This allows the milk weight measured at each stall to be matched to the cows according to their order of entrance. The challenge for our installations is that we need to very reliably read every tag, one at a time, in order. This is made even more difficult by the rf noise produced by poorly designed and/or installed variable frequency drives used on vacuum pumps and well pumps. It always amazes me that the systems can accurately read tags >98% of the time and with some clever pattern matching algorithms that compare the milk weights measured to the expected milk weights for the cows read, the data accuracy reaches nearly 99.9%. This video was VERY interesting for me. It is cool to see how this works. I am looking forward making my own reader using this information.
Could be interesting trying to merge the two components... ua-cam.com/video/FXI21S4ZWJU/v-deo.html ;-)
I would recommend multiple readers. Preferably one strategically placed near a feeder or an automated scratcher. Maybe even make the feeder dispense food conditionally on the reader getting a good read. I'm also working on automated ecg analysis for cows, among other animals, and that could actually be used to identify cows, too, but it's less practical.
Interesting that you used these tags. I am sure you can do some pattern recognition to increase the hit rate. If only one is lacking it is always clear which one it is, if you always have the same cows to milk. Good luck with your project!
I hope no human was harmed during this dangerous experiment
"2 hours of angry silence and a mild mauling."
Only I was hurt. Nobody else ;-)
Thanks for the video! I love the idea of the round coil, where the cat goes through - I always had a sensor placed above the door in mind, not around the door - nice idea!! Keep up the interesting videos!!
The idea came with the first experiments...
I've been gathering parts for this for a while now so this a great video!
I hope it will work for you, too!
I love Dishka! She certainly purrs up a storm :-)
Thank you! She also gets lot's of love here...
This was brilliant - I learned so much. Thank you Andreas!
Glad it was helpful!
Wonderful video Andreas! I love your sense of humor :-)
Thank you!
Amazing Andreas! Great as usual :)
Thank you
You are welcome!
This is the perfect form of cat detection! So clever! I always got stuck on this idea because i thought you had to tag the animal with some kind of RFID / BLE device around the neck.
She carries such a tag since she was young.
Been waiting for someone to upload this for a while now lol Thanks for all the useful info!
You are welcome!
This is great Andreas! I was planning on a project to determine how much food each of two cats are eating (based on weight change), one is chipped, and the other not. I had already ordered RFID reader from AliExpress which I assume will not work because of the special LF band you mentioned, but thankfully you saved a structural engineer frustration! I am in your debt sir.
I was frustrated when I did my first video. This was the reason for that one ;-)
Awesome video yet again. Keep up the good work Mr Spiess
Thank you!
I've been wanting to make a similar project for a while. This video will really help, thanks!
You are welcome!
" . . .high voltage warning - - this one must be good!"
Of course! ;-)
I have three chipped orange tabbies that look very similar. I have long thought of making an RFID system that would announce their names as they passed by it. Just for the heck of it, mostly.
Nice idea. Like my last project, which says hello if I enter ma lab ;-)
Love it! And love your humour 😁 i have two cats, and one is overweight. This looks like a fun project for weight control
I am not sure she will find it "fun" ;-)
I've been meaning to do this for ages but not quite got around to it.. well done! We were early adopters of the Pet Porte RFID cat flap... interesting design... basically just a PIC doing the hard work with the coils above the animal rather than the animal passing through... i.e. the coils are at 90 degrees to the door but stick out over the top directly above the shoulder blades where chips are normally implanted. We have a creep of tortoises, all chipped,... might be fun watching them going in and out of their house. I don't intend to chip myself as I think we have somewhat different skin structure!
If you know where the chip is you might get away with a cheaper reader on a shorter distance. Would save some money.
@@AndreasSpiess Not if they position themselves. Definitely need a wide field.
Another great and funny video Andreas!
My experience with the neighbor''s cat is that those who are chipped (very few) and have automatic door open access on their backyards and houses also have a very short range detection systems on those RFID detectors.
But great video!
Thank you!
@@AndreasSpiess I see the comments about feeding the neighbor's cat and quite frankly my cat brings in the all gang home some time's. I though about the RFID thing to make that entrance cat control, but his gang behave's while at my house ... so now when he "invites" his friends to lunch or a snack "hangout" in the middle of the afternoon I simply look around, count how many they are, and simply put the food there. While they behave they get a compensation.
My neighbor's are actually paranoid about their cats always wanting to know were they are if they get late home. So I relax ... no problems so far.
Well done, love the video! I built a chip scanner years ago, but nobody would sell me chips for pets, not even veterinarians. I had to use immobilizer chips instead, that's the only kind I could get back then.
Interesting. Now it is much easier. But still, you have to know what you do.
Plus für die Kadse😻👍
Danke für diesen Beitrag, das hat mir noch gefehlt als Ansporn für unsere Katze :)
Die Katze wird nichts bauen. Der Ansporn ist vermutlich für dich ;-)
This is great! I am plotting a sort of “Stray Station” for tracking + taking care of Stray Cats / “Community Cats” in an area, sometimes groups called “Cat Colonies”.
I am thinking some method to track would be of use, and RFID (post TNR) seems great!
I’ll definitely use your work and read up on this more, thanks for this!
Good luck with your project!
It was both informative and entertainting. Thank you and wish You the best.
You are welcome!
Love your pointer Andreas ;)
Thank you!
And the grand winner of the best youtube video thumbnail award 2019 goes to....the man with the Swiss accent, and his Y̶e̶t̶i̶ erm...cat ( beautiful btw )
She was really mad and scared me!
Thanks! You helped me with a pet door problem I had been mulling over for a while.
Glad to help. And thank you for your support!
You can use shorter distances with a bit of cooperation: Cats can easily learn to rub their shoulders on a reader in order to do something they want: open doors, get food, throw something. Especially with a small beep. For a while now I have been working on a framework to think about animal training by artificial intelligence, and how to teach animals more complicated stuff.
Interesting idea. We still have a Circus around here and there they have very well trained animals. So it must be possible to train them. Not yet with AI, though ;-)
Nice Work as always 👍😄
Thank you!
Great video again, also a nice scope 500 MHz. Thank you.
You are welcome! The scope was not necessary this time. Only 134kHz ;-)
Your cats are very handsome, I love them! Great idea on the automation for them, and I'm impressed by the implementation.
Greetings from the Utah high desert.
Thank you!
Very useful info.
I plan on making a public kiosk to take pets to that have been found and see if they have a chip and what is the number.
Then they can use that number to locate the owner.
So the good samaritan can locate the owner with out having to take the pet to a vet to get scanned.
And get the wayward pet back sooner.
This is done by the vets here. They have such a reader
Haha, besides informative, your videos are becomming quite funny too. Worked on a website on which vets could retrieve owners info by entering the tag of a pet that was found. This was already in 1997 when ‘chipping’ pets became populair in the Netherlands. Good memories (programming in MUMPS).
I have to adapt to the consumer needs ;-)
The real question is, does the cat meow with a Swiss accent? ;)
Good question. Maybe somebody has an answer?
Probably. Research shows that cats only meow to humans and that both humans and cats can recognize their person/cat's meow in a crowd of meows. So if Andreas has a swiss accent, odds are Dishka does too ;)
@@txtigr I've heard that before, but I've seen plenty of instances where two of my cats will be in another room and meow at each other. Or one will call another one from a different room using a particular meow. Sometimes it almost sounds like speech.
@@txtigr My Belle would meow at my Beauty. It was one way communication as Belle could not hear. Through the course of time lead Mystery to develop PTSD in relation to white cats.
Probably I misstated it. The study I saw said that cats do vocalize with each other, but the sounds they make with their human are different with the ones they use with each other. Our cats "talk" to each other as well as just "talking to themselves", but somehow it always is a different sound than the ones they make with me.
If you want to dive deeper have a look at the US Library of Congress page www.loc.gov/rr/scitech/mysteries/catscommunicate.htmlSorry for moving this off topic, but it is a fun subject.
Thanks Andreas. I have made a motorised catfflap, because one of my cats feels very vurnerable with the flap on his head. RFID was a logical next step. So I build the reader out of discrete components, driven and read by an AVR Mega. I must say that the analog side of this project, like resonance and filtering was a humbling experience. I learned a lot about this black magic side of electronics. It would be good if vets would also see this video. It is a basic question while working on this project: How parallel is the vet?
I can imagine that creating these filters is not easy. I also assume you do not get lots of information on how to do it.
Would you be able to share your work/research on building from components? I've been struggling to find an EM3405 :(
Great video! its definately giving me some great ideas 💗
Thank you!
Thank you Andreas, very interesting my friend.
You are welcome!
I thought the tester at 9:58 was something fancy. I just stumbled across it elsewhere. A $10 LCR-T4? I'm ordering one now, because it looks like a lot of fun!
And, thank you for doing all these tests. I was stumbling my way through making the same thing, and results with chips so far were poor. Looks like I'll be getting the fancy "high voltage" receiver.
These transistor testers are very good!
Hi Andreas, good You did this. I am also playing with RFID for my cats and had the same readers on my list, but was not sure which one to try, but was about to order the third one with the high voltage. At first I played with the normal 125kHz readers - I had some of the very cheap HZ-1050 readers laying around. They also work for the 134 kHz tags, as the difference in frequency is not too far apart. You don't see anything on the output though, as decoding differs from the 125kHz tags and the chips simply is not programmed to react to that sequence. But if You take the signal directly from pin 7 of the LM358 amplifier, You can decode the ID of the animal tag. I tried it, and it works. The coil should be optimized for a better range and the voltage is too low for a real world project but in principle it works and the HZ-1050 could be completely reprogrammed as it is an ATMEGA8 and the header is exposed.
Chipping of the cats is really no problen. I assisted my vetenarian when she chipped my cats. Their skin is less sensitive to pain as ours and although the needle looks frightening, they did not even react to the stitch at all (I was holding them). There wasn't even blood as the chip is placed between skin an "inner cat".
Regards Frank
Good to know the trick with pin 7. Maybe someone uses it and writes the software. But I am not sure how strong these readers are. I think they are comparable with the cheaper ones.
No, it is not strong enough for a real world scenario. The cat"s skin reduces the distance even more, but for testing or proof of concept it works.
I just noticed that your little oscilloscope pointer doesn't have a little white glove on it. What size would it wear? Perhaps we can start a fund drive to buy it one.
I already printed one in white. But I have to paint the rest :-(
Really nice job and sweet cats :)
Thank you!
Thank you for this video, it has pretty much all the info I was looking for. I'm planning to install a chip reader at the front door and garden door of our apartment to receive a warning via Home Assistant when our cats cross them. That way we can know and act right away if they ever escape (as the apartment is in a big city and our cats are not used to going out on their own, and when they go outside with us it's in a mostly enclosed garden in a more rural area at our house, they would very likely get lost, maybe permanently, and possibly hurt if they ever got out unsupervised).
One thing I'm wondering is what orientation the chips are inside the cats. Since we don't have cat flaps on the doors and my project is meant to be a warning system rather than automating something like a cat flap or feeder, the most ideal location I can think of for the antenna would be flat on the group (possibly inside the doormat). But I'm not sure if this would work with a sufficient range.
Otherwise I suppose I could try to put the antenna parallel to the door frame.
You have to try the reach of the antenna. But usually it is only a few cm.
Hi Andreas, really enjoyed this video as did many others from you.
As for the module you finally used for your POC cat feeder did you eventually get any information about the use of J5-J10 bridges to choose a different combination of caps?
No, I have no additional info.
When I saw the "Home Automation for Cats", my first thought was "How can they solder without opposable thumbs?".
Another commenter mentioned cats rubbing up against things. They do like to scent-mark, and I gather that the chips are usually implanted not too far from their cheeks. You might be able to help with the range problem by putting the smaller coil on some sort of post at about head height (they like to mark tree-like objects). For training, have the RFID control a treat dispenser. Once they associate "Marking a tree that looks like this " with "Good things happen", you could use the posts to control pet doors (with inside and outside posts to make the door swing the right way), food dispensers, and other automation.
Thanks for the info. This is probably more for an animal trainer. With my background, I stick to technical solutions ;-)
For cats (not sure about dogs, but probably similar) the chips are generally inserted between the shoulder blades, slightly forward of them. Mostly because this is a location they can't scratch/chew and won't dislodge them while healing into place. Just FYI. :-)
This is a perfect youtube video.
- Not to long.
- Nerdy, yet clear.
- Purring cats.
Thank you! She was not always purring, if you look at the thumbnail picture ;-)
Thanks for the info Andreas. I think the antenna voltage is 360V though with that module and not 36V, hence the high voltage warning, so you may have used an x10 probe but not setup the scope accordingly.
Maybe. I do not know.
An inspiring video ! Indeed usefull.
Thank you!
Great video as usual. Would it help the range if you tune the resonance of the LC tank in the Tx to peak at 134.2kHz either by changing the loop turns or the capacitor value? Is higher Q-factor better or worse in this application?
I did not look inside the analog design, so I have no idea. I assume the reduction of the number of turns did exactly that: To match the frequency better.
aww great video, I admire you so much :)
Thank you!
Ржачное видео! Умелая подача материала! Интересные темы, великолепное доходчивое объяснение с иллюстрациями! Хорошая дикция! Так обучаться - одно удовольствие, спасибо, автор!
Hilarious video! Skillful material feed! Interesting topics, great intelligible explanation with illustrations! Good diction! So learning is a pleasure, thanks, the author!
You are welcome!
I really hope you read this, halfway trough the video you pointed out that 2 readers interfere with eachother on the cheaper chip.
Would I be able to build a feeding place with 2 cat doors with 2 readers if I used one of the more expensive chips?
I assume it depends on the distance between the two loops. But I never tested such a setup because I only had one sensor of each design.
What a nice video! Also thumbs up for the thumbnail image. 😂
img.ua-cam.com/users/viy89yJ1Fq-hQ/maxresdefault.jpg
😂
Thank you! She was really upset and scared me ;-)
Great video, good info, and funny.
Thank you!
Hi Andreas, thank you for your video and your friendliness.
Is there a way to increase the capacity of the antenna that you're using?
Thank you in advance 😊
There are always possibilities. But they are not simple, I think. Amplifying the currents, and increasing the loop size would be possibilities.
Well you can make many things with it. If she's going out it's obvious to make some kind of automatic cat door. You can monitor her behavior ie. approaching her bowl or litter box.
You are right. And a viewer used this technology to decide how much milk each cow was delivering every day.
I wonder if you could also use this on the surrounding area of a normal cat door and detect the cat standing in front of it, tho I guess the power would be too little for that.
Should be possible.
Very interesting. How sensitive is the new "animal loop antenna" to switching power supplies? You said at the beginning of your video that these readers are sensitive to EMR. Did you checked the minimal distance?
I did not make any additional tests in this direction.
Great video, thank you. As a hobbyist maker I don't have access to complex electronic testing equipment. Is there a simple formula for getting in the right ballpark for the number of turns on the antenna given we will know 1) The diameter of the coil (catflap, 3D printed loop etc), 2) desired operating frequency, 3) specs of copper wire?
Not that I know of. Antennas are very delicate and influenced by many things.
No animals were harmed in the making of this video, only Andreas
And only one scratch on the arm. Nothing big ;-)
You are on the right track but a follow on project will need more intelligence to detect playloads - small rabbits, snakes, and mice! One of our cats regularly wants to bring in something to play with! We live in the country and I have imagined several applications like automatic door with airlock (very windy here) but I haven't come up with a bulletproof way to keep the wildlife out. If for no other reason than the mouse will weigh almost as much carried on the inside (snack) as outside (playload) :-)
Somebody builded this by using image recognition: joakimsoderberg.github.io/catcierge/
Andreas, such a good video! Do you have a circuit diagram you use for the final project with LED and everything?
Unfortunately, I do not have more documentation available :-(
Great video! I have purchased the "Middle Reader" from AliExpress and I'm having trouble knowing how to connect it (there is little documentation or examples to find). Do you have a wiring diagram available? Thanks!
This is an old video and I do not remember more than I showed :-(
The image on aliexpress of the long range module looks like it has a bunch of capacitors with solder-jumpers. Of course it was easier to unwind a few turns of the new coil, but it seems nice to get the other option directly from the vendor. ;)
It was hard to get any information for these readers. I assume it will be even harder to get information about these jumpers :-(
I gained information about these jumpers just by looking at them and the row of unconnected capacitors. I expect them to be all in parallel and also parallel with the coil to form a tank circuit. With the 0.55mH included coil there was probably 25.3pF (Possible E12 series values: 22pF + 3.3pF) enabled. There were probably also a not connected 15pF and 2.2pF capacitor, and with 17.2pF your 82mH coil would be good for 134kHz
Another idea would be, removing these fixed value capacitors and installing a small trimmer close to the coil instead. And to tune it, I'd go for maximum peak to peak voltage when the reader is active. Or the reader isn't locked to a crystal but to the resonance frequency of that tank circuit, then it would be possible to move it to exactly 134,2kHz (it was slightly off).
Just something I'd play with. ;)
:-) excellent video!! nice work... beautifull cats !!!
Thank you very much!
Love your project, would it be possible to know how many loops were left on your 200mm ring for a good starting point for producing my own version of this?
It is hard to count. I guess 15-20 at a diameter of 22cm. But You have to measure. Start with more because cutting is easier than adding ;-)
@@AndreasSpiess Thankyou, that will give me a good starting point
Great video. I have had the idea to use RF reader to enable access to cat door flap. However, knowing that my cat is an excellent hunter that likes to bring in "trophies" that are more or less alive I decided to drop that idea. Only way would be an image recognition system to make sure the cat is not carrying anything in its jaws. Perhaps an idea for another great video featuring cats and home automation.
Good idea. Maybe still combined with the tag reader. It might be hard to distinguish Gini from Dishka using pattern recognition.
Our is no hunter, she is probably too old :-)
@@AndreasSpiess My cat has once "delivered" to the door an entire magpie that was a third her size. I imagine the mayhem if it had been brought into the house and played with it and then butchered it on the fine carpet. Happy day for cat - not so much for human girlfriend :-D.
My cat has a very unique face with white red and grey areas so in my case a pattern system might be well suited. Such a system would have to be 'trained', I guess. I am curious how much effort that would take. Perhaps it is hard to train it to see "object in mouth". I can not estimate how hard of an ai-software problem it may be.
Yes, this was interesting! Had some ideas for my cats (Chief and Stitch) but yeah, I always have to many project ideas. Nice to see somebody else also experimenting with it with Chinese readers. Two question though. The coil you made, you just build it or did you do some calculations? And did you only try the more expensive reader? I would be interested to see if the cheaper readers also work is the cat is inserted into the coil (aka distance is pretty small).
Each reader needs a different coil. I tried to switch coils and it did not work. I had a working solution so I did not check the weaker devices. The chance they work is not too big, I assume.
Hi, thanks for the great video. I have bought and tried the second RFID reader and connected it to an Arduino mega. I tried to read it but constantly get 0 from Serial.available(). Any idea what I am doing wrong?
Unfortunately, I cannot do remote debugging. I would connect the reader to a USB to Serial adapter and check if the reader works. If you have an oscilloscope this might also help. But first I would check if you reversed RX and TX...
Hello Andreas, nice video! Thanks, nice to see that it actual works! I’m also working on a petfeeding system for my 2 cats, each with a seperate diet. Can you give/send me a link how you connected the last one (the high voltage one). I couldn’t find this via the links below .. I’m currently struggling with that. Thanks!
You should be able to read it with Serial.read(). I have no code anymore :-(
@@AndreasSpiess Thanks for the answer, I was doing that, but sofar no success for me. Btw, my cats have a dutch accent ;-)
@@RealDameBlue I'd love to hear an update. did you succeed? Surefeed bowls wont do for us bc we need a system with a timer for scheduled feeding when we leave for a weekend, so our cat sitters dont have to come in twice a day but only once. I was thinking to get a small shelf with doors, put cat doors into its side walls on 2 different levels that recognize which cat is trying to enter, and place something similar to catmate bowls inside (the round ones with a built-in timer). i'm kind of in the mood to overengineer the whole thing
Andreas, do you know what the RST pin is on the expensive board. I'm guessing its reset but pulling it to ground didn't do anything. The board seems to only report the chip ID once when it first sees its presence. I'd like to be able to poll for a chip on demand so I can tell if the cat is still present after it's seen and I was hoping the RST would do that.
I never tried this variant. So I do not know
Thanks for the great video, it's often hard to find info on the 134.2kHz stuff. I'm curious about the antenna diameter, wire gauge used and how far away from the antenna will it still reliably detect the cat?
The rech is only a few cm. The idea is that the cat passes the loop
@@AndreasSpiess Thanks for the response. I am having issues getting my antenna to read more than about 10mm away from the antenna...basically if I pass the RFID tag directly against the antenna, I can see it but if I am say 2cm away it will not detect. If the cat is going one way through the cat door, then the antenna works. If the cat goes the other way, the gap created by the flap on the cat door prevents reading. I am sure that the issue my lack of skill with building the antenna, and hoping I can figure out how to improve. Thanks!
@@rogerarchibald Did you ever figure out the issue? Try to match the antenna diameter to what Andreas used, as well as try different orientations of the antenna plane vs the chip. It could be unlucky how the chip in your cat is oriented. May be easier to buy a chip online for testing so you can control this more easily (rather than flipping your cat around in circles :) Also could be the reader not using enough power or the number of turns in the antenna.
Hi Andreas, I have 2 cats that are over weight. I'm planning to integrate this detection in a feeder and access plaform for my 2 cats.
On the one hand it will measure the amount of food they are allowed to get (on a daily basis), and on the other hard it will allow access to their own food bowl based on the chip id.
Thank for pointing me the right way to the correct chip reader...
Bad for the cats ;-) I hope everything goes well. This is an interesting project!
@@AndreasSpiess Thank you. Still in progress ...
However I was wondering is the model for the gate/custom antenna is available somewhere? Thingiverse?
It was just a hack :-(
Hi Andreas, I'd like to build a similar receiver and build my own antenna. I think you used copper wire with insulation (enamelled). Would it be possible to use wire without insulation?
The wire has to be insulated. Otherwise it behaves like only one winding.
she is adorable! :)
Thank you. I will tell her ;-)
so which one did you use for the final one with the self-made loop? The most expensive one? Or would the middle one also work? Do you think you missed any important details if I were to replicate this? I only have moderate knowledge on these things
I used the expensive one.
Hi is it possible to do a screen test, mainly power consumption, for small oled or e ink module? Thx
I think so.
What do the bank of capacitors links do ?
I assume you use them to tune the Ariel ? But not sure how
If it is tuned does it improve the range ?
The range will always be small.
Thanks for the experiments & the video ... will try out the 7€ version to build a small reader w/ ESP8266 and OLED display for our animal rescue organisation ... hopefully it will work ;)
This should work.
Received the reader within less than 2 weeks, came with an RFC card, supposedly FDX-B, which works in short distance (~2cm), but can't get it to read either my dog's tag, nor the neighbors dog's ... not sure whether it's the "wrong" antenna/reader circuit, or the bad maximum distance ...
I'm building an automated cat feeder based off your video, so THANK you for doing this testing! Question though: what is driving the diameter of the loop? I'd like a larger loop for my kitties if possible (maybe even a square shape), but I assume I'd reduce the range of the scanner. Is this true?
The driving factor is the size of the cat. But you have to test the range.
No, if you make a square shape that would effect for the position of your tag, the tag and the antenna should face to face, but in a circular shape the different position of your tag wouldn't cause anything
Hi Andreas, was that your video when you mention "image recognition" or a snippet from somewhere?
So far I did nothing with image recognition :-(
The 4 dislikes were from cats who did not fancy a dirty great needle injecting an RFID tag under their skin!
I don't think they can feel it. I had to inject considerable amount of saline under the skin for a few days and my cat put up no fuss.
They feel it. That's why vets now prefer to chip under sedation. I call the needle for injecting the chip rather a pipe.
@@carelx7029 are you sure? That area at the back scruff of their necks that the momma carries them by is very nerve inactive. But many cats also don't tolerate a vet poking and prodding period and they probably give shots while they do the RFID too, so sedation is probably a norm for the work. Just guesses based on experience.
@@anullhandle Same. And that was a *big* needle!
I had 5 cats chipped unsedated. My job holding the cat and it sure hurts them. The bigger the needle the bigger the chance you hit something. Off course vet ethics is also a moving subject. No pain if it can be avoided is now the standard.
Hello, how do you do the conversion from the HEX you are reading from the RFID reader, and converting it to the number(DEC) that is shown on the tag itself?
Maybe you have a look at my code (link in the video description)?
@@AndreasSpiess i see that you convert Numbers from (x-y) into nummers between 0 and 9, this method does not seem to be working with my tag(dont know if my hex is difference to yours).I most sertainly missed something, but did not find a Great description in your code to solve it.
Hi Andreas, is it possible to build a coil as big as a front- or other door, so aproximately 2.00 x 90 cm? So you can detect if a pet went through the door. The coil is than hidden around the doorframe. I understood the method to follow is: measure the inductance of the sensor coil and replicate this inductance in your own coil. (I have lots of thin enamelled wire.) And is there a formula I could use to know in advance how many turns I have to make around the doorframe?
I do not know if this would work. But I am very sceptical. You have to try if you want to know.
That was very helpful, I am building a cat scanner to place outside but I wonder if you give me some advice about the DIY antenna, I am using a 24AWG cable for about 20 CM diameter. The ohm is about 6.03 but still cant scan the chip.
Resistance is not important. inductance and resonance is important. And unfortunately I cannot do remote debugging :-(
@@AndreasSpiess oh yeah I just talked to the guy who made the board and said the same. They were very helpful. Apparently there is no much different in working state between 6 and 9v. He told me that at 6v will just heat up more.
I found one small bug on your software where I can store a bigger number than long. I got a test chip that is bigger and I need to work out how to store that in two different long
@@AndreasSpiess got more info, the antenna should be tuned to 580uH , from what the manufacturer told me, I am using 24 AWG but seems not working but once I get the meter I will double check why.
Also I found from another youtuber this handy calculator www.circuits.dk/calculator_multi_layer_aircore.htm
I have to try, but maybe uint64 will do the job to fix the overflow of the 10 byte to int of the RFID.
Extra info. There is a need of a capacitor for this module to make sure you can have the full range and potentially change the jumpers. The manufacturer suggest a 1000 capacitor
Hi, should the module flash when it reads a chip? Does it need to be able to read a chip even if it's not connected to the Arduino? I ask these questions because my module does nothing, even when powered it detects nothing. Thank you.
I do not remember those details :-( But it should work without Arduino.
Thanks for the lesson. We care for a friendly feral cat that has adopted us and remains outside. He has been processed by the "Catch, vaccinate, nueter and release program". They also clip the ear of the cat so if trapped again they know it was previously processed. My wife read they also chip some of these cats and we are curious if our furry friend was also. I have the means now to do so. Cheers.
Adopting these poor cats is a good thing!
this is Amazing RFID program and give me an idea for my sheep.
Good luck with your project!
I'm wanting to do this with my reader so i can track these strays, hope to find your info to help me do that.
Thought about just modified reader.
Or maybe you have pre built one cuz I'll take years to learn it.
I am just a UA-camr and do not sell anything :-(
Hello Andreas. I know this is an old video, but I'm not finding anything on your website about this implementation and it's something I'm quite interested in. I've seen your github page for this, but would like details on how to wire things together, which I assume would be on the blog. Thanks!
I do not have other information available ☹️
Does matching the inductance of your antenna with the one that works mean that your antenna will work too, or are there other considerations?
Your assumption is right.
Great video
I’m only learning so I like to try and understand how the sketch works.
I’m not sure about the Hex into decimal function
It works fine for country.
When doing the ID , when you get to message[9] the mult x 16 is bigger than an unsigned long, so mult goes back to zero.
This means you only process the first 7 values
The checksum I have know idea how it works! And help with that would be great
Many thanks
Unfortunately I do no more remember what I did in this sketch and I have no time to go back.
Cool! Which module did you use for your DIY-coil? Would the cheapest do?
I used the most expensive. You would have to wind a different coil for each device. They do not work if you switch antennas
First, I would like to say thank you for your great videos. You are one person that I admire very much, I am a big fan. When I was doing a bit research on alliexpress I notice that a few vendors posted that with a area of antenna bigger, the range could be bigger too. Did you notice if the cards can perform better (increasing the range) enlarging the area of the antenna?
I only changed the antenna of one device. But as I showed you cannot just change the antenna.
@@AndreasSpiess ok yes I understood. But do you believe that if I use the last device that you used but change the size of antenna square (bigger) can I reach a better range of detection?
Andreas, your very informative video has given me hope of detecting cat pet-chips in an application I'm working on. I've prototyped and am currently using (well not me, my furry lab assistants are actually 'using') a litter-box (tray) that records motion video from above and has load cells below for weight measurement(rpi + arduino). I'm trying to make a system to record potty behaviors for early detection of health problems. Anyway, to automatically log which cat is using the box I'd really like to detect their chip. If I was to mod the antenna of the most powerful unit you linked and had the loop in a horizontal plane at the top rim of a deep cat tray would i have a chance of detecting a "between the shoulder blades" chip?
You saw how far of the antenna the chip was detected. So you decide. Of course, it is much easier if the cat moves through the coil.
@@AndreasSpiess I think a test is in order! I'll get the 'expensive and dangerous' unit and give it a shot. I'm also trying BLE-beacon tags for detecting who-is-in-the-box. If interested in the cat-box detection and weighing, the test results will eventually appear on raspberry pi forum here ( www.raspberrypi.org/forums/viewtopic.php?t=223728 ). Thanks again for great video
Andreas, did you try out the 9vdc reader with the esp8266? I am worried about the voltage (3.3 vs 9) but the Arduino Mega serial port is good up to 20v. Cannot find a spec on the esp. Also, have you posted a wiring diagram anywhere? I also left the comment from Lamachine on your Git.
You can check with a multimeter if the output pin has 3.3 or 5 volts. The ESP8266 is 5V tolerant, The ESP32 not.
@@AndreasSpiess Yup, I figured it out and already calculated the voltage divider. Thanks so much for the video as well as the answer.
I have 2 cats. One is a nibbler, the other is a gorger. I have been thinking that I need a feeder that recognizes which cat is which and keeps track of their food consumption so it can be limited to healthy amounts.
Good idea! This should be possible with such a reader.
Thanks for another interesting video. Instead of only robbing our money with your mailbag video's, now we also need to get more cats. :)
But pay attention: You get a lot of Chinese stuff for one cat ;-)
Warning: There are two new Mailbag videos in the making :-(
Hi Andreas, I was thinking of making such an RFID tag for my animals but I couldn't understand the HEX calculation you did (6:40). Even looking at your code I couldn't understand the logic behind it. Do you remember how you did it?
No, I do not remember :-(
Hello! It's lovely to see how animal behavior is getting more and more an automatic thing. I'm trying to do something similar with rats imitating how you didi it, but I couldn't find a sketch for the circuits on your own media links, can you help me out with that please?
There is no sketch available :-(
I bought the expensive reader but the number I get is missing a few zeros compared to the reader the vet has, this means I can not look up the animal on the database here in the uk.
Any ideas why this is happening?
I do not know. Maybe you look at the code if it has a limitation?
do you think you can use 3 antennas on one chip? With a switch between the antennas and the chip. The switch decides which antenna is used by move detection sensor or so. I want to build 3 feed channels in one box. How did you manage the entry restriction? Magnetic Locks? Thanks for your share.
You should be able to add relays for several antennas, I think. And I never did entry restrictions, so I cannot help.
@@AndreasSpiess what is your current use case for RFID reader?
@@saintenr3162 Currently, I do not use this technology anymore.