Reading multiple tags simultaneously - NFC advantages over QR - NFC Hacking

The advantages NFC has over QR code is the ability to be read without lights and on curved surfaces. One potential advantage could be to read multiple nfc tags simultaneously. Is this possible with NFC?

No, this wouldn't be possible - not with phones, at least. Many readers, when presented with two tags 'stacked' together, will simply read neither of them. Others will read just one of them.
A slightly related piece of information is that a single NFC tag can't be read by multiple devices at the same time.

Related

Are these NFC Tags good?

Didn't see an NFC tag thread. I asked this in the MP Lounge but figured Nexus owners would really know since this is probably the phone most used NFC.
I don't know NFC tag specs very well, but this seems like a good deal, apparently a 4" distance read and it's "better" than "older" tech tags (whatever that means).
At $1 each, is this good? I plan to get some to play around with some NFC tag tasks.
http://www.ebay.com/itm/10-X-SMARTR...337397?pt=PDA_Accessories&hash=item3cc9b85075
ntag
orangekid said:
Didn't see an NFC tag thread. I asked this in the MP Lounge but figured Nexus owners would really know since this is probably the phone most used NFC.
I don't know NFC tag specs very well, but this seems like a good deal, apparently a 4" distance read and it's "better" than "older" tech tags (whatever that means).
At $1 each, is this good? I plan to get some to play around with some NFC tag tasks.
It's a NTAG203 type, Highest ScanStrength of all, but not one combination of Phone-Tag goes up to 4 inch. The "best" phones goes up to 2 inch (4 cm) with this type of tag. www nfc-phones.org/nfc-tags/ (About Tectiles, SmartTags, Tag+, Mifare and much much more.)
The price, $ 1,-, depends also on the amount of tags and shipping, You want 1000 pc? shop around a bit .
Click to expand...
Click to collapse
joao22 said:
It's a NTAG203 type, Highest ScanStrength of all, but not one combination of Phone-Tag goes up to 4 inch. The "best" phones goes up to 2 inch (4 cm) with this type of tag. www nfc-phones.org/nfc-tags/ (About Tectiles, SmartTags, Tag+, Mifare and much much more.)
The price, $ 1,-, depends also on the amount of tags and shipping, You want 1000 pc? shop around a bit .
Click to expand...
Click to collapse
No, 10 is fine, lol. Dunno what I'd do with 1000 of these.
$10 for about $12 shipped on this deal.
On this specs it says:
The SMARTRAC 38mm Bullseye NXP NTAG203 is one of the newest NFC tags available and of the highest quality. It has significantly improved performance over previous tags such as the Ultralight, Ultralight C and Mifare 1K. It offers 144 bytes of user memory and a reading distance of up to 10cm. They can be made read-only and are compatible with all (see note below regarding Sony Xperia) current NFC enabled devices and read/writers.
The reading distance of 10cm is where I got 4 inches from, is that BS?
You're saying this is a good quality one though? Is there a better deal you can point at if I just want 5 or 10 or should I just get this one?
orangekid said:
No, 10 is fine, lol. Dunno what I'd do with 1000 of these.
$10 for about $12 shipped on this deal.
The reading distance of 10cm is where I got 4 inches from, is that BS?
You're saying this is a good quality one though? Is there a better deal you can point at if I just want 5 or 10 or should I just get this one?
Click to expand...
Click to collapse
For many, this ntag type is a good choice.
10 cm = 4 inch, yes, theoretical maximum for nfc. Every handset is different, I never read of a phone able to read from 2 inches. In tests, up to 40 mm is the maximum achievable distance.
I think the price is ok (shipping very cheap).
This NTAG type should work with all nfc enabled devices (mifare classic type not). Highest ScanStrength and reasonable storage.
You could also consider; what is most convenient for me? Stickers, key fob, round or square, outdoor?
I just received NFC tags from tags for droid.
I wrote a few and they work just fine. My package even came with a key fob which is awesome.
I got 10 + key fob for $15.99 shipped.
Here's the link. http://tagsfordroid.com/tags/Home.html
Sent from my Nexus 7 using xda premium

Samsung Galaxy Gear vs Sony Smartwatch 2 - Detailed Comparison

Seems like Sony has decided to go a step backwards in designing their smart watches... The SW2 was fantastic and very useful because it handled like a small phone, being able to have your apps displayed across home screens and having the ability to download many other apps. Android Wear just doesn't appeal to me... It's way too simplified and dumbed down of an experience for my liking.
so your contribution to the sw3 forum is "I don't want a sw3" lol
Even better, I don't want a ducati, I want a car, the use of only two wheels is a big step backward in the world of driving.
None of this is relevant feedback. If you want an android wear watch that is perfectly readable in daylight and can keep on all day without worrying about battery life, this is the one. The main cons in my book are the lack of interchangeable straps, the lack of wireless /easy charging, and the lack of a heart rate monitor. That said, as of today, I think it's the best aw option because of the usefulness of the screen.
Fwiw I have an original gwatch, moto 360, and briefly a gear live.
Khidr said:
The main cons in my book are the lack of interchangeable straps, the lack of wireless /easy charging, and the lack of a heart rate monitor. That said, as of today, I think it's the best aw option because of the usefulness of the screen.
Fwiw I have an original gwatch, moto 360, and briefly a gear live.
Click to expand...
Click to collapse
This watch does have interchangeable straps. I also wish it had wireless charging, but I'm okay with it due to the IP68 rating. Also, the fact that it's micro USB and not a proprietary charging cable/crable is a plus in my opinion. Concerning heart rate monitor's, it's lack is apparent but at the same time, HRM's are not very accurate in wrists compared to chest or arm bands. I won't miss it.

SWR50 Accelerometer/Gyro

I am interested in making some vibrations measurements using an SWR50 smartwatch. I have been tinkering a bit with it, and making a tiny app that samples and stores accelerometer data. While doing it, two questions arose:
Which is the accelerometer/gyroscope chip installed inside the watch? I have been searching teardowns of this watch to get it, but the only one I found doesn't have enough quality to read the reference of some chips. I'd like to know the part used, to browse its datasheet.
I'm getting a maximum 250 Hz sampling rate. Is it possible to obtain a higher one? Reading here, it looks like there is no conventional way of doing it, but I'm wondering if maybe hacking through OS images...
I'd like the measurements to be as precise as possible, but it looks like it can be tricky obtaining good results.

[DISCUSSION] Physical watch versus Smart watch...

What do you think of the physical watch over a smart watch idea?
I think it would be fine if the physical part would be transparent, for example when watching emails it would be completly transparent but normally there would be a led lighting it up
I like the idea of an analog watch with some smart watch features, the reliability of analog would go great with some basic use-cases of digital. Like, a watch that sends text messages? A watch that makes calls? What's the point when you have a phone in your pocket.
For privacy, I prefer analog versions of as much things as I can. Too many companies tracking everything you do on digital stuff.
davidhozic said:
What do you think of the physical watch over a smart watch idea?
I think it would be fine if the physical part would be transparent, for example when watching emails it would be completly transparent but normally there would be a led lighting it up
Click to expand...
Click to collapse
To me, this sounds like strapping your car behind some horses. I personally think it's not such a catchy idea, .... but to each his own!
davidhozic said:
What do you think of the physical watch over a smart watch idea?
I think it would be fine if the physical part would be transparent, for example when watching emails it would be completly transparent but normally there would be a led lighting it up
Click to expand...
Click to collapse
Doesn't Sound like a bad idea to me!
Smart Watch is better
The thing we wear on our wrists is getting a new life, and that is tech. With touchscreen and sensors, watches are becoming "smartwatches."
We're seeing an era in which everything wants to be improvised with technology. But how do these relatively new gadgets stand against the giants which has built their fame for ages?
We humans see tech a solution to a problem. When we have no way to communicate, we create telephones.
When we need communication mobile, we create smaller devices. When we need portable computing machines, we develop smaller computers we can hold on our palms. Technologies were known to create something based on our needs; it fixes things and eases the way we interact with our world.
But tech isn't stopping there. It's also moving into an industry we know thrives and survives well even without them. Techs are getting into your wardrobe; they're coming as part of your daily clothing. In short, they want to be inseparable from humans.
Apple Watch
With tech getting on our wrists, Apple has it with the Apple Watch, Samsung has it and Pebble also.
More contenders are up and against each other for the market that is once dominated with the likes of Swiss watchmakers. But how do these gadgets affect the industry? They certainly caught a lot of headlines, and they're all up against those old-fashioned watchmakers that made the value of a "watch" at stake.
Apple and others have taken a long time before having the proper time for the proper technology, and the vision to being their products to the market.
What we have on our wrists, previously, were worn by millions; they show bits of time, date and some others. Tech makers are fond on putting more things than necessary, but this time, they made another successful debut.
In the age of information, tech companies are putting more and more information. Smartwatches put a lot more things on your wrist. And the possibility is that there will be more things than you ever need on a device strapped tightly on your wrists.
Will these smartwatches be a replacement to the old-fashioned handmade state-of-the-art pile of cogs and gears? No. The traditional market will always have its own fans because they never want to purely put information on the wrist.
They all move in a different market.
Mohit Bansal Chandigarh says Smart Watches are Better Than Physical Watches
Mohit Bansal Chandigarh says Smart Watches are better as they offer loads of features which are helpful in our daily routine. Some of the features are activity and fitness tracking, heart rate monitoring, GPS, calorie tracking, Barometer, Sedentary Reminder, and Sleep Monitoring.
whizadvert said:
The thing we wear on our wrists is getting a new life, and that is tech. With touchscreen and sensors, watches are becoming "smartwatches."
We're seeing an era in which everything wants to be improvised with technology. But how do these relatively new gadgets stand against the giants which has built their fame for ages?
We humans see tech a solution to a problem. When we have no way to communicate, we create telephones.
When we need communication mobile, we create smaller devices. When we need portable computing machines, we develop smaller computers we can hold on our palms. Technologies were known to create something based on our needs; it fixes things and eases the way we interact with our world.
But tech isn't stopping there. It's also moving into an industry we know thrives and survives well even without them. Techs are getting into your wardrobe; they're coming as part of your daily clothing. In short, they want to be inseparable from humans.
Apple Watch
With tech getting on our wrists, Apple has it with the Apple Watch, Samsung has it and Pebble also.
More contenders are up and against each other for the market that is once dominated with the likes of Swiss watchmakers. But how do these gadgets affect the industry? They certainly caught a lot of headlines, and they're all up against those old-fashioned watchmakers that made the value of a "watch" at stake.
Apple and others have taken a long time before having the proper time for the proper technology, and the vision to being their products to the market.
What we have on our wrists, previously, were worn by millions; they show bits of time, date and some others. Tech makers are fond on putting more things than necessary, but this time, they made another successful debut.
In the age of information, tech companies are putting more and more information. Smartwatches put a lot more things on your wrist. And the possibility is that there will be more things than you ever need on a device strapped tightly on your wrists.
Will these smartwatches be a replacement to the old-fashioned handmade state-of-the-art pile of cogs and gears? No. The traditional market will always have its own fans because they never want to purely put information on the wrist.
They all move in a different market.
Click to expand...
Click to collapse
Very true. Absolutely agree.
Omega Seamaster / Longines Conquest / TAG / Rolex are statements in their own right - not just for blind technology. Hey, maybe we are so engrossed with tech that we fail to see that some may NOT want a beeper on their wrist for every notification that comes in/even if customized.
There's something called too much of it.
Hii every one,
Today's time where everyone, keep moving to the modern world here to stay fit is every one 1st priority. But due to unorganized schedule create a lot of health issues. So here is a new smartwatch which helps everyone to keep count everything. As I am working one, and not have enough time to measure my working hours and heart rate. Once I was just browsing in net, and I found bestviewreviews site, there I find lots of option and multiple varieties. And then order smart watch from there. And you will not believe, from the last 5 years, I am using the same smartwatch. It is nice, perfect in counts my pedometers and helps me to control my heart rates too.
Does not look good Sound I think it's a bad Idea.... !!! You have to again focus on it.
Satisfiedshoes
i think its a good idea but i think smart watch is better and it provides a lot of features.
Popularthemereview

Question Why the supernova when using fingerprint sign-in?

First time with an in screen finger print scanner. It seems the Pixel 6 turns on at maximum brightness (regardless of the screens brightness) a circle under your finger as you unlock. This is very bright in a dark or dim room, causing my finger to glow bright red, sure I can see bone!
As I understand it the finger print scanner is just a capacitive scanner under the screen, so not something that "sees" justifying the bright light, so why is this happening? Is it just something Google thinks looks cool without giving much thought to it, or does it have a purpose?
I'd really like to get it toned down so it's not so jarring in a dark room when using at night, but see no settings to allow this, is there a way to change it?
Struggling to see how this is any better than a rear fingerprint scanner.
It's not capacitive, lel. How would that work? It's hidden under the display.
It's an optical fingerprint scanner. And optics means it requires light to function.
There are three main systems in smartphones: Capacitative, optical and ultrasonic. Google opted for an optical sensor on the Pixel 6 (pro).
Without light, the system can't work. It requires a combination of light and dark.
A capacitative fingerprint scanner uses an array of tiny capacitor circuits to cllect data. How would you exchange/store electrical charge, if a glass panel is between the scanner and your finger? It's just not possible, from a simple physical conditions standpoint.
It's working as intended.
Besides, it's simply NOT better than a rear fingerprint scanner. The old Pixel rear scanner was beatiful and just worked. In a dream world, the Pixel 6 would have faceunlock AND a rear fingerprint scanner, so we can enjoy unlocking with ease at home and use the fingerprint scanner whenever we wear a mask in public.
But, we are not in an optimal world.
Morgrain said:
It's not capacitive, lel. How would that work? It's hidden under the display.
It's an optical fingerprint scanner. And optics mean it requires light.
Without light, the system can't work. It requires a combination of light and dark.
It's working as intended
Click to expand...
Click to collapse
Many thanks, I did Google it after posting and found it was a CCD device so optical, should have done that first! I thought it just worked the same as the rear ones but just placed under the glass. Everyday is a school day, guess I will just have to use a pincode when its dark.
Must say I find the rear scanners much easier and natural to use, I don't see these personally as any improvement.
PhilipL2021 said:
Many thanks, I did Google it after posting and found it was a CCD device so optical, should have done that first! I thought it just worked the same as the rear ones but just placed under the glass. Everyday is a school day, guess I will just have to use a pincode when its dark.
Must say I find the rear scanners much easier and natural to use, I don't see these personally as any improvement.
Click to expand...
Click to collapse
You're welcome. I agree with you here, I liked the Pixel 2 and 3 scanner at the back, with a case on you just had this "easy" resting and finding place with your finger. It just "moved" naturally into the hole and unlocking was never a problem.
Sadly, Google decided to opt for another solution.
I edited my previous post btw with some more info about scanners, maybe you will find it useful.
I think it's a shame that Google doesn't use the latest technology for its fingerprint sensor. Google developed the Tensor chipset in collaboration with Samsung. Why didn't you just adopt the ultrasound technology for the fingerprint sensor from Samsung? In my opinion, this technology would be a perfect fit for the Pixel 6. Has it probably got too expensive for Google or Samsung doesn't want to share the technology (yet) with others? In any case, it's a shame.
KiLLiNGDAY said:
I think it's a shame that Google doesn't use the latest technology for its fingerprint sensor. Google developed the Tensor chipset in collaboration with Samsung. Why didn't you just adopt the ultrasound technology for the fingerprint sensor from Samsung? In my opinion, this technology would be a perfect fit for the Pixel 6. Has it probably got too expensive for Google or Samsung doesn't want to share the technology (yet) with others? In any case, it's a shame.
Click to expand...
Click to collapse
Maybe it had something to do with the supply situation, many parts are only hard to come by.
Pixel 7 next year got to have a reason to upgrade. I can see the return of a rear or ultrasonic in display + face unlock as a feature heavily marketed lol
Google is trying to stay up to date with the cool kids. That optical sensor is a gimmick nobody asked for. It's not nearly as fast or precise as the rear one. But hey, at least it's "cool".
PhilipL2021 said:
Struggling to see how this is any better than a rear fingerprint scanner.
Click to expand...
Click to collapse
I believe what's supposed to be potentially better about them is that they don't take up as much space in the phone, making more room for other things (like the huge batttery). I could be wrong about that.
KiLLiNGDAY said:
Has it probably got too expensive for Google or Samsung doesn't want to share the technology (yet) with others? In any case, it's a shame.
Click to expand...
Click to collapse
It is my theory that they have an agreement with Samsung to not make their phones "too good" (gimp them), in exchange (and money) Samsung provides them some parts. For that matter, Samsung could've just refused to license certain technology to Google. I'm glad at least the storage is UFS 3.1, from Samsung.
I suspected it was more for looks. Trying to make themselves look more mainstream.

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