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An idea to use nexus s as a key-fob

Hi,
An idea just hits my mind when I put my nexus s beside my key fob for my room, nexus has shown an unknown tag using NFC technology. The idea is to make nexus reads the key-fob id then use nexus as an alternative key-fob.
Hopefully someone can get this idea out and make it real.
Thank you.

I guess to start, someone will need to be able to tell the NFC to *transmit* instead of just receive.
Sorta like the FM radio chip that's supposedly on board. Someone said in another Nexus S thread that there's an FM radio chip in there somewhere (in the wifi chip maybe?) and that it was intended to be a transmitter.

cormyn said:
I guess to start, someone will need to be able to tell the NFC to *transmit* instead of just receive.
Sorta like the FM radio chip that's supposedly on board. Someone said in another Nexus S thread that there's an FM radio chip in there somewhere (in the wifi chip maybe?) and that it was intended to be a transmitter.
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Click to collapse
this is the chip in the Nexus S and it does indeed transmit and receive FM
http://www.broadcom.com/products/Wireless-LAN/802.11-Wireless-LAN-Solutions/BCM4329

It should be possible. The NFC chip on the NS can do write/card emulation/P2P modes, but they're not enabled in the Gingerbread API. There's library code to get close to doing this in previous revisions of the AOSP projects (see libnfc-nxp.git and Nfc.git projects), but the NFC library's hairy and poorly documented, so it'd be a bit of an effort (I've looked).
Google have said they'll be enabling the write and P2P modes later, so it's either more hackery now, or wait for Google to enable it.

mwak14 said:
Hi,
An idea just hits my mind when I put my nexus s beside my key fob for my room, nexus has shown an unknown tag using NFC technology. The idea is to make nexus reads the key-fob id then use nexus as an alternative key-fob.
Hopefully someone can get this idea out and make it real.
Thank you.
Click to expand...
Click to collapse
The only problem I can think of is the method in which key fobs work. I have a 135i with comfort access and I know for a fact they use a type of rolling code to prevent this kind of thing. You would have to be able to adjust the frequency each time and make sure that your car picked up that same frequency.
That probably doesn't make too much sense, and I'm having a hard time putting it into words so here, this explains rolling codes and how key fobs work:
http://electronics.howstuffworks.com/gadgets/automotive/unlock-car-door-remote1.htm

booyakasha said:
The only problem I can think of is the method in which key fobs work. I have a 135i with comfort access and I know for a fact they use a type of rolling code to prevent this kind of thing. You would have to be able to adjust the frequency each time and make sure that your car picked up that same frequency.
That probably doesn't make too much sense, and I'm having a hard time putting it into words so here, this explains rolling codes and how key fobs work:
...
Click to expand...
Click to collapse
If it's not NFC-compliant tech (which from what you describe, isn't), it won't work, that's a given.

Nfc can be used for secure access so like your coprorate buildings and is liminlted to about 10cm distance. So yes, a car manufacturer could implement it.
As for a radio fob, most of those are 868Mhz low power RF. Funny thing is, NXP, the semi company that makes the nfc chip also makes the 868Mhz RF chip in most car fobs.

(Work in Progress)NFC for all SGS2

Hi guys,
Yesterday I was thinking about how to enable the NFC sgs2 not have this technology, so I thought that using bluetooth or wifi direct you might also enable nfc
Android is not a developer so I need someone who can create a program that "hijack"the signals that are transmitted via the nfc nfc chip to an external device via bluetooth or wifi direct, then I did this I will create a hardware device composed of the NFC chip and a receiver / transmitter bluetooth or wifi direct to hide behind the battery, you will be able to receive the signal and then sending it to the NFC chip.
Does anyone know how to help me?, I am completely new in the Android paronama.

Think you need an extra chip for that, not as "simple" as hijacking a signal.

^
From what I understand, I think he is suggesting an "external"/standalone NFC device that will communicate with the phones via Bluetooth or Wifi.
@OP
I suggest you look for NFC capable android-arduino (open source dev boards for android phones).
Like this(I think this is exactly what you want to do as that board all needs is a BT module and an android program to interface with the board.):
Arduino to Android IO on the cheap (aka Poor Man's NFC)
http://jdesbonnet.blogspot.com/2011/05/arduino-to-android-io-on-cheap-aka-poor.html

I think the only advantage of NFC technology is security.
It was intentionally design to attenuate in a very short distance for security sake.
If NFC signal can be transferred to another wireless signal,then why we use NFC in the first place.

Listening device using phone(s), Bluetooth, headset, FM Radio

How could one use a cell phone(s) to listen in on their office when off premise. For instance-A phone with ringer turned off & auto answer where a phone will answer after a set amount of silent rings-3, 5, 10 etc. Or could Bluetooth be used if someone was only 15 feet away & again an auto answer scenario/setting. Sometimes a headset is supposedly needed & has to be plugged into achieve this effect & would use the Michael in the headset for listening. Any hardcore mods would be OK that may require soldering, micro soldering, extra parts, rehousing phone in different case, programs etc. Also, If anyone knows of any Java options/programs or anything that would need a cable & software would be fine too. Yeah, An older Java type track phone would be great-But Android, Windows Mobile etc. would be fine. Or would a website work for 2.4 ghz fine tuned to the device & have it bookmarked on a browser on an android phone device for quick access but prob limited range unless there is a site you can buy a page for your special needs-Or what aouta scanner site like radio reference?. Also is there anyway to listen to the audio portion of 2.4 ghz The portion of the band used for security cameras etc. Audio would be fine-Video a bonus. Bluetooth operates somewhere in the 2.4 ghz band as well. Some phones have FM radio but that would require a major overhaul_basically starting over as the system is not set up for a FM transmitter-But it could be done. I've seen devices that use a sim card like a computer mouse that works/acts like any mouse but uses a GSM sim card-So, One calls the number assigned to the sim & gets full audio of the room with no distance limitations-But many have the disclamer "Does Not Work In USA Or Canada" Most say this-But not all. I'm wondering if this is for legal reasons & more of a formality than reality as I had a similar situation before. What would be the best GSM sim do you all think would be best? Also a finished modded unit would be fine too-But really need the reciever to be a phone-Of any type. Let me know. Thanx.
PS-I'll share results answers, PM's with anybody who asks.
Saw a phone modded & done for sale by an outfit in England for about $1,500 that was amazing. Did way more than I needed-But maybe at a later date etc. $1,500 is way out of budget-But zi'm realistic & not cheap for what I need. Prob a $300/cap.
Sent from my SGH-T959 using xda premium

bigthunder1 said:
How could one use a cell phone(s) to listen in on their office when off premise. For instance-A phone with ringer turned off & auto answer where a phone will answer after a set amount of silent rings-3, 5, 10 etc. Or could Bluetooth be used if someone was only 15 feet away & again an auto answer scenario/setting. Sometimes a headset is supposedly needed & has to be plugged into achieve this effect & would use the Michael in the headset for listening. Any hardcore mods would be OK that may require soldering, micro soldering, extra parts, rehousing phone in different case, programs etc. Also, If anyone knows of any Java options/programs or anything that would need a cable & software would be fine too. Yeah, An older Java type track phone would be great-But Android, Windows Mobile etc. would be fine. Or would a website work for 2.4 ghz fine tuned to the device & have it bookmarked on a browser on an android phone device for quick access but prob limited range unless there is a site you can buy a page for your special needs-Or what aouta scanner site like radio reference?. Also is there anyway to listen to the audio portion of 2.4 ghz The portion of the band used for security cameras etc. Audio would be fine-Video a bonus. Bluetooth operates somewhere in the 2.4 ghz band as well. Some phones have FM radio but that would require a major overhaul_basically starting over as the system is not set up for a FM transmitter-But it could be done. I've seen devices that use a sim card like a computer mouse that works/acts like any mouse but uses a GSM sim card-So, One calls the number assigned to the sim & gets full audio of the room with no distance limitations-But many have the disclamer "Does Not Work In USA Or Canada" Most say this-But not all. I'm wondering if this is for legal reasons & more of a formality than reality as I had a similar situation before. What would be the best GSM sim do you all think would be best? Also a finished modded unit would be fine too-But really need the reciever to be a phone-Of any type. Let me know. Thanx.
PS-I'll share results answers, PM's with anybody who asks.
Saw a phone modded & done for sale by an outfit in England for about $1,500 that was amazing. Did way more than I needed-But maybe at a later date etc. $1,500 is way out of budget-But zi'm realistic & not cheap for what I need. Prob a $300/cap.
Sent from my SGH-T959 using xda premium
Click to expand...
Click to collapse
im pretty sure any kind of phone taps and such like that is probably illegal.

Illegal in (most) countries. And unethical.
Sent from my MT27i

Smartwatch for cycling.

I have a question. If I would like to use the SmartWatch following situation: I'm going on a bike, on hand SmartWatch (without SIM in slot), in a backpack or pocket smartphone HH6 (with SIM) paired with a watch by BT. Someone calls me, I answer a call on the watch and lead the conversation by saying to the hand on the steering wheel. At this time, simultaneously goes GPS and Endomondo. It is feasible that equipment? Such a test network I have not seen, and the only excitement is that you can let go of a game or film. Which to me is a complete misunderstanding, taking into account the size of the display and battery.
I thought about d5 but there probably is not possible to carry on a conversation by saying to watch when the SIM card is in your phone.
Can the new K18 (2016) would give this advice? Is K18 and K10 the same thing?
Wysłane z mojego H60-L04 przy użyciu Tapatalka

I would say a yes - sort of... There are considerations which would affect your scenario that would impact *any* device regardless of who manufactures it. If the phone is in a backpack and the watch on your wrist, there there will probably be issues with BLE signal quality between the devices. However, if the phone is on the side where you're wearing the watch, then there will less drops/glitches. This of course is *before* we talk about the quality of the wrist device itself - in how well its microphone/speaker might work, etc.
With all of that said, I have a similar setup with several devices. I just received the No.1 A10 (mainly for swimming but also for general use when out-and-about) and the K9 3G (more for 'civilized' situations) each of which I pair with my HTC one M8 when in-use. I also have a SIM in my K9 3G, both as a backup for my phone and for SMS (I've been involved with the SWApps Link app roadmap since early stages - so I test its failover from BLE to Push and SMS) and for tethered use/notifications from the phone. I'm not sure if that helps you, but it should give you some 'color' on the options that are available.
I think just about *any* device will promise to do what you suggest. But there's bad news: the real world. The little bit of time I've spend with the A10 as a transponder (phone calling **** Tracy style, but the call is to/from the mobile phone in my pocket with the A10 as mic/speaker) has been bad enough that I pulled the phone from my pocket and took over the call. I'll spend more time experimenting with it and the K9, but I'm not sure if the technology is really ready for the real world, if the hardware I've selected is actually up to the task - or - if my standards are simply too high.

I thinks all you need it an Android wear/ or Original Android to connect with your phone and also can run Endomondo. To answer the call, I think it will be better if you use a bluetooth headset, It will better for music, voice training and call.
Now I'm using a D5 with backup sim with a mi bluetooth headset to track my running. I let my phone home and set an automatic app to send a sms for someone who call my phone to call to my backup number in necessary case. And it just works fine with me (I try and D5 can run almost all running apps quite good. But for see the map when you run, looklike Runkeeper and Endomondo is the best)

So at the moment is not fully good watch, which can be used for making calls, if your SIM card is near the inside of the phone?
I care not to insert every time the SIM card from my phone to watch and vice versa. I also do not want to run another SIM number.
Are D5 offers such a possibility at all? In the movies on YT people call from the watch, in which is placed SIM card. I have not seen anyone talking on his watch and the SIM card in the phone.
Are currently in the Chinese market is something better than D5 in price to approx 150$. I mean similar or better functionality. I mainly depends essentially on the good battery life, protection against light rain, GPS and the communication with the phone, about which we speak. Maybe M8? There is battery 600mAh.
Are K18 for example, would not be better? There is probably the SD card slot.

elephant_ml said:
So at the moment is not fully good watch, which can be used for making calls, if your SIM card is near the inside of the phone?
I care not to insert every time the SIM card from my phone to watch and vice versa. I also do not want to run another SIM number.
Are D5 offers such a possibility at all? In the movies on YT people call from the watch, in which is placed SIM card. I have not seen anyone talking on his watch and the SIM card in the phone.
Are currently in the Chinese market is something better than D5 in price to approx 150$. I mean similar or better functionality. I mainly depends essentially on the good battery life, protection against light rain, GPS and the communication with the phone, about which we speak. Maybe M8? There is battery 600mAh.
Are K18 for example, would not be better? There is probably the SD card slot.
Click to expand...
Click to collapse
You confusion is well founded. My two examples, the No1 A10 and the K9 3G are to show examples of *completely* different device setups.
A10 - Bluetooth connection to phone only - no SIM. It has a microphone and speaker for using like a bluetooth headset for answering calls, except it's on your wrist. The No1 A10 can be found online for $50-60US.
K9 - It can *both* function as a bluetooth extension to the phone like the A10- - AND - also operate on its own with a SIM chip inside the watch itself. Depending on how your carrier operates, you *may* be able to set up the SIM on your wrist to look/act/feel like the SIM on your phone (presenting the same number, receiving calls, etc) so that the experience is relatively seamless. But aside from the technical hurdles as to whether the telecom/mobile carrier actually allows this function - there's the cost. I paid $124 for the K9 3G and you can find it for prices in that range at various outlets online. The cost of running a second SIM and related hassles vary widely.
The D5 is more similar to (and perhaps even exactly the same as) the K9 3G though I don't know the D5. I chose the K9 because of the 1900 support that allows me to use it on T-Mobile in the US.
These two different device profiles give different positives and negatives. One the one hand, the K9 is a much "smarter" watch, with more capaiblities - being that it runs full Android 4.4.2. On the down side, it burns through battery very quickly when in heavy use (such as running Google Fit to track steps/location via GPS during workouts) - and it isn't fully waterproof. The A10 is water "resistent" and presumably more able to handle the rough-and-tumble world, and the battery last several days without a charge - but - it has no SIM, no memory to speak of, and relatively limited functionality.
That is a very, very long way of saying YMMV (your mileage may vary).

Question about NFC RFID Emulation

I've looked all over for detailed information on smartphones NFC feature and it's ability to emulate an RFID card, but all I keep turning up is very generic information and can't find anything that really digs into the technical specifications and limitations.
This being the one stop shop of all things Android, it seemed logical to try here first to see if anyone might know more that the basic grab regurgitated over and over everywhere you look.
What I have managed to glean from my scouring is that NFC in smart devices operates at the 13.56Mhz range, which seems to be the standard for RFID chips available today. But apparently there's also another group of RFID chips using a much lower frequency of 125Khz and this is where I couldn't turn up any relevant information.
What I'm wanting to know is are the NFC devices backward compatible with the lower frequency? If not is there any sort of chip that acts as a bridge between the two bandwidths that would allow a newer device to communicate with an older one?
I guessing from the lack of info that the answer I'm looking for isn't what I'm going to get, but that's why I'm here, to find out for sure one way or another.
The long story made short to this inquiry is I have a aftermarket device that adds push to start feature to an otherwise ordinary keyed ignition automobile that uses RFID to enable the ignition system, but as I've uncovered it's using the 125khz frequency, that I very much would love to find a way to use my oneplus 8 pro's NFC functionality to be able to operate.
So is there any way I can make this work or am I just SOL and short 2+ hrs of my life for not just coming here first?