Hi, anyone of you using NFC tags?
I bought some and don't know if they are working correctly...
My tags are only found when they touch the back glass - when there is a little spacing they don't work! Whey I use the plastic phone protection (less than 1mm thick) the tags are not detected any more! (maybe once in 100 attempts)
What distance do you reach?
Is there a possibility to increase the range?
What part of the back are you touching? The antenna is right between the LG and the Nexus. http://guide-images.ifixit.net/igi/yapggXkL1qUdlt3J.huge (The black sticker)
It works fine with my dixtronic. That covers the glass too.
I believe NFC has a maximum working distance of 1.5 inches.
AW: NFC distance
1.5 inch are about 3.5 cm - I don't even get 0.3 cm!
It is independant of where I put the tag - believe me, I tried it everywhere on the phone...
So you manage distances of several cm? Then I must have bought bad tags...
AW: NFC distance
Once more:
- What tags are you using?
- What distance between Nexus 4 and tags is (really) possible?
I'm having this same issue and this thread came up in Search so I thought I'd revive it instead of making my own thread.
I am using two different NFC stickers as my test. One is actually stuck to my desk at work, the other is still on the wax paper it came on. I can only get the movable sticker to read, and that's only when I touch it to the back of my Nexus and slide it down. Once it reads, I set it down on my desk to act like it's stuck (in case the one that is stuck there is bad) and I can't get it to read. I even set the phone down on it, nothing. I hover a millimeter above the desk and slide it down the phone and I get nothing. When I lift it back up and touch it to the back and slide like before, it reads. Why is my range SO small? How is it not reading the stickers when they're horizontal on my desk? If it matters at all, I bought the stickers from the people who made NFC Task Launcher app.
Well - to be honest, I do not use them anymore...
BUT: If you try "NTAG203 168 Byte" or "NXP Mifare Classic 1K" or "NXP Mifare Ultralight C 192 Byte" (the best one) you can reach far more distances (up to ~2cm) - then it works though the Phone-Cover and some mm more plastic without any problems.
Ok I did more messing around and found out what was wrong, I'll post in case anyone in the future finds this thread.
After doing more experiments, I found that I could lift the phone up, and lift the sticker up and it would read the sticker from a distance of around 2-3cm. I tried doing it horizontally and vertically, in case for some random reason, my phone's NFC wouldn't read horizontally. It worked when off the desk, but as soon as I set the sticker back down and tried to read it, nothing. After pondering for a bit, it hit me. My desk is basically all metal. I didn't really think of it because most of what I see is "wood", but upon further investigating I found out it's just a thin covering of some material that looks like wood on a full-metal desk. After 1 Google search, I find out that metal can interfere with NFC signal, which is why I couldn't pick up my tags on the desk.
Sure enough, put the tags on a small stack of sticky-notes and my phone read it from about 3cm above the tag. Problem solved. Man, that was frustrating. I was worried that my phone's NFC sensor was defective or something. I wasn't about to RMA and wait for weeks to get my phone back, I'd miss the thing too much so I'd just live with it. Well, that's not the case so great. Hopefully this helps someone in the future.
Oswald-Kolle said:
Hi, anyone of you using NFC tags?
I bought some and don't know if they are working correctly...
My tags are only found when they touch the back glass - when there is a little spacing they don't work! Whey I use the plastic phone protection (less than 1mm thick) the tags are not detected any more! (maybe once in 100 attempts)
What distance do you reach?
Is there a possibility to increase the range?
Click to expand...
Click to collapse
I've tried tried on a wireless payment card and my N4 can read it through 5mm of paper, any more than that it can't find it.
The problem may be with your tags, do you have anything else you can test it with like a wireless credit card or transport card?
Related
Hi Guys,
I bought one of these and as "good" as it may seem, just warning you off, or at least giving you notice.
The magnet affects the phone and operates the screen by it's self.
Well, that's a little miss leading. What it does is I think, is tell the phone that you have opened the slide.
So depending on your settings, whenever you attach the phone it will either unlock it, open the dialer, read your sms messages or start pressing the soft keys.
Apart from the ridiculously poor delivery (1st class postage arrive 7 days after shipping. A parcel from US came quicker" ) that I don't know whether to blame on them or Royal Mail, I must of got the one adapter with no bloody adhesive on the back! Industrial sticky tape needed, that's if I decide I can live with the unlocking!
*mods* Really sorry, I didn't notice the "accessories" thread. I only hang out in this one, I've only just noticed it.
Sorry to hear you are not very happy with this, i've had one for a while and i reckon its one of the best i've had. as well as being small and discreet the magnet holds the pda even when driving down dirt tracks and over speed bumps.
The magnet does occasionally set off the quick list but it has already been mentioned on this forum that it is activated by magnet it just depends where you put the adapter
i dont know about you guys but im keeping magnets well away from my device.
kerrance76 said:
The magnet does occasionally set off the quick list but it has already been mentioned on this forum that it is activated by magnet it just depends where you put the adapter
Click to expand...
Click to collapse
Do you have a Dual then? Where is your strip to attached the magnet?
After a bit of experimentation, if you place the strip horizontal just underneath the camera (in the center) then the magnet wont set off the phone!
Now I've fixed it with my own tape I'm really happy with it!
i've got mine right in the middle, covering the orange logo, after playi g with it a bit last night it seems to depend a lot on how quickly you move the dual towards the magnet and whether you go staraight towards it or come in from an angle. one thing i havent tried is disabling the quick menu, will give it a go later as i never use it anyway
Prying the frame open wasn't such a problem although you should be careful not to force anything, it actually clicks open nicely when handled carefully. I ran into problems with the little bridge of the GPS, it broke of when I looked at it. Well actually I did help a little with a screwdriver but it broke on touch so to speak.
So there I was with a broken GPS and my sight isn't everything either so what to do. Well I found a solution. Have a seat. This is shocking.
I folded a peace of alu foil a few times and fitted it in the little space on the speaker just left from the gps and covered the broken bridge with it. I wont have to tell how difficult this is considering you have to avoid all contacts in this area. So if you try it it's your choice.
Result. A blasting fast GPS that indeed gives me never seen before fixes. This just must be my lucky day. Geocaches here I come. Time to put my external GPS aside again. Nothing beats a mad hatter.
So you kind of inadvertently upgraded the GPS antennae!
Thanks for posting, don't suppose you could post a picture?
Been checking this GPS thing myself.
I actually wonder how people manage to break that contact. You only have to bring it up a notch.
When checking the back cover you can see that there are 2 places that are contacts. i've checked with the multimeter and both are connected to each other.
Now there is one thing that is strange to me. The contact that is not the one touching the metal 'spring', well on the circuitboard there is this what looks like a piece of conducting foam that would make contact with the other one on the back. Measuring that foam it indeed conducts. It conducts to ground (measured between the coax connector and foam = 0 Ohms).
Now I actually dont know if it really touches the antenna but it would be odd to create a contact when it would not be touching.
So maybe there are 2 places that should make contact to the antenna.
Does anyone have an actual clue, or even better pictures, of the changes that were made on the models after October?
I just received a cheap case for temporary use until I get an actual one, but the case claims to have the "smart cover" feature where the magnets put the tablet to sleep. However, the tablet doesn't go to sleep. I tried using a fridge magnet and running it along the screen as I've seen it done in videos before, but that doesn't even work. Is mine defective? Does anyone else have this problem?
Thanks
You're sure that you're putting the magnet on the right spot?
Well I ran a magnet all the way around the 4 sides and it doesn't shut off. It's "supposedly" on the left side right?
Yeah, it's on the bezel just left of the screen somewhat near the bottom. Make sure that you're placing the magnet exactly where they put it in the videos.
Okay I played around with it, a kitchen magnet does nothing. The case does nothing. Weird thing is, when the tablet is not in the case, I can use one of the magnets in the cover and it'll work. I've tried many other magnets and none work. The case itself seems messed up as the magnet is on the outside edge (right side) and not on the left. Does it only work with certain magnets?
As far as detecting magnetism goes, it's only the strength that matters, so maybe your non-working magnets aren't strong enough and therefore the sensor can't detect the presence of a magnet?
Yeah I considered that, but I tried several different ones but no go. Although the magnets on the case that holds the case closed does work. The thing is, those two magnets that hold the case closed are on the right side of the tablet, whereas the sleep is on the left side. I'm going to email the seller about this and hopefully it can be dealt with. At least I know that it works...
So I've been using my N7 on and off since I bought it in January. I would've used it more if it wasn't for the fact that the touchscreen responded really bad to touch and freaked out every now and then. It even almost bought an app on its own in the play store once. As I bought it through a retailer in another country I figured I would try to fix the problem myself - and I did kind of.
I tried a lot of things that people suggested in other threads here on xda, reddit, youtube, etc. but the only thing that seemed to work somewhat was tightening the screws around the edges after opening it up. The problem still persisted to some degree and got worse again after a few weeks.
After opening it up again a few weeks ago to fiddle around with the screws again I realized something - the phantom touch problem was gone and the screen had perfect response whenever I was handling it with the back cover off. So I put it in a case without putting the cover on first and I've been using it like that ever since - this leaves the wifi/gps/etc. without a grounding connection though, and I also prefer to use it without a case so my question is this:
Has anyone had the back cover apply pressure/mess with the touch screen in any way?
I have no screen lift at all, but these are the methods I have tried:
Tightening screws(worked somewhat)
Loosening screws(didn't work)
Putting a small piece of paper between the black cable that apparently connects the touch screen and the circuit board in case it was causing a short there due to pressure or something(didn't work)
Additional info: Whenever I remove the back cover, the only place where I have to apply some extra pressure to get it loose is right around where the aforementioned black cable is.
erikkr said:
So I've been using my N7 on and off since I bought it in January. I would've used it more if it wasn't for the fact that the touchscreen responded really bad to touch and freaked out every now and then. It even almost bought an app on its own in the play store once. As I bought it through a retailer in another country I figured I would try to fix the problem myself - and I did kind of.
I tried a lot of things that people suggested in other threads here on xda, reddit, youtube, etc. but the only thing that seemed to work somewhat was tightening the screws around the edges after opening it up. The problem still persisted to some degree and got worse again after a few weeks.
After opening it up again a few weeks ago to fiddle around with the screws again I realized something - the phantom touch problem was gone and the screen had perfect response whenever I was handling it with the back cover off. So I put it in a case without putting the cover on first and I've been using it like that ever since - this leaves the wifi/gps/etc. without a grounding connection though, and I also prefer to use it without a case so my question is this:
Has anyone had the back cover apply pressure/mess with the touch screen in any way?
I have no screen lift at all, but these are the methods I have tried:
Tightening screws(worked somewhat)
Loosening screws(didn't work)
Putting a small piece of paper between the black cable that apparently connects the touch screen and the circuit board in case it was causing a short there due to pressure or something(didn't work)
Additional info: Whenever I remove the back cover, the only place where I have to apply some extra pressure to get it loose is right around where the aforementioned black cable is.
Click to expand...
Click to collapse
Hmm, have you checked the N7 under a florescent tube light? You should try to view the light's reflection on the n7's screen. It should be 'mirrored perfectly'. If the reflection of the light is crooked/bent, this means your screen is no longer flat. Ie. A flat mirror should show your reflection as it is. A curved mirror will distort the reflection.
If the screen is heavily distorted, this could mean the touch sensors are also 'bent' and touching the screen internals.
Check the reflection with cover on, and also cover off.
If with the cover off the n7, the screen seems to be 'flatter'. Then we could conclude the screen is fatigued by stress somehow by the attachment of the covers. If it somewhat same, then the problem is something else.
Since the cover provides ground points for the n7 circuit and it's antennas, maybe you should try cleaning the contact points on the cover side. There should be grooves made by the contact pins from the n7 on the cover, over time they might oxidize and cause a short circuit.
It is possible the touch mechanism is not being properly grounded somehow.
PLEASE BE EXTREMELY CAREFUL if you are going to clean the contact pins on the n7 side, they are small and very brittle.
Try to see if anything on the cover is touching the circuit board or creating a short circuit somewhere when installed.
These are the 2 causes i can think of. I had this problem too, i loosen some screws and re-check under a florescent light to see it's reflection, and i re-loosen or tighten until the reflection is nearly perfect (screen should be flat and reflecting like a mirror), if not it is bent by stress from screws being too tight or loose at some points.
Then i also cleaned the contact points and pressed the aluminum 'heatsinks' on the n7 side to make sure they dont contact anything else. I did both the same time, following by a switch in ROM and Kernel. So i'm not sure which actually helped. I'm sure i took some stress off the screen by the reflection thing. The grounding also makes sense as an intermittent ground causes stuff to f-up (my car) lol. But you may try n see how it goes. Cheers.
I bought a second handed H918 in Asia and later found out the GPS failed to lock at all. AGPS works, but it is far from accurate and useless for navigation services.
I google a lot of similar issues, some suggested it's a software fault, some have to return the phone to LG for replacement. Since mine does not have any warranty whatsoever, I can only try to fix it on my own.
After I remove the top plastic trim, there are six metal connectors from the motherboard, but only three of them are aligned with a metal content point on the trim, that means only the antenna in the right is in place. I happened to have a dead LG G4 around me, so I pull one of the antenna sticker from its plastic cover (marked P1C 0518 from the top left corner) and aligned it to the top left connector (it is very lucky that the connector in the G4 is nearly the same width, so it only takes a little mod to make it fit). After I cut away all the unnecessary part of the antenna sticker to make it fit inside the plastic trim, it will still block the ir blaster which I will never use, so it is okay for me.
And my GPS is back! signal is strong and very reliable.
But I still have one question unanswered, I have no idea what is the use of that middle antenna. Does anyone have an idea what it does? I can't find any problem not having it. WIFI, BT, LTE all working very nicely.
Type2501 said:
I bought a second handed H918 in Asia and later found out the GPS failed to lock at all. AGPS works, but it is far from accurate and useless for navigation services.
I google a lot of similar issues, some suggested it's a software fault, some have to return the phone to LG for replacement. Since mine does not have any warranty whatsoever, I can only try to fix it on my own.
After I remove the top plastic trim, there are six metal connectors from the motherboard, but only three of them are aligned with a metal content point on the trim, that means only the antenna in the right is in place. I happened to have a dead LG G4 around me, so I pull one of the antenna sticker from its plastic cover (marked P1C 0518 from the top left corner) and aligned it to the top left connector (it is very lucky that the connector in the G4 is nearly the same width, so it only takes a little mod to make it fit). After I cut away all the unnecessary part of the antenna sticker to make it fit inside the plastic trim, it will still block the ir blaster which I will never use, so it is okay for me.
And my GPS is back! signal is strong and very reliable.
But I still have one question unanswered, I have no idea what is the use of that middle antenna. Does anyone have an idea what it does? I can't find any problem not having it. WIFI, BT, LTE all working very nicely.
Click to expand...
Click to collapse
Well done! Is there any chance you took any photo's while you had it apart?
I wish I could see it as well. My gps unlocks all the time
If this will help, I upgraded my H918 to the the latest stock 10u firmware and am now running a stock ROM and my GPS gets a lock near instantaneously when on device only. Not sure why but my phone just did not seem to like custom ROMs such as WETA ROM nor the NATF MEGArom when it came to GPS. I'm on ARB1 now so I think my only options now are ALPHA ROM and SUPER ROM so Im a plan on trying those eventually and see if same thing happens.
No clue why this would be as many users for those ROMs running my model reported no issues but just throwing it out there for people having issues.