Arduino and NFC
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Yeah that's one of the errors I was getting before I sorted it out - you've put each one seperately in there along with the ndef folder and whatever other libraries you have installed, then you've restarted the arduino program?
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Well, whaddayaknow... the RC522 unit did a full dump from the Alpha ring using that library you found.
The one I had was a branch from that and must have been doing something odd.It wont work with my normal ring, and it refuses to play nice with the old-style carbon fiber, but it does read that one alpha inlay, and does a full content dump.
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Yeah that's one of the errors I was getting before I sorted it out - you've put each one seperately in there along with the ndef folder and whatever other libraries you have installed, then you've restarted the arduino program?
yeah, each of the folders are in the arduino lib folder separately, including ndef.I eventually got it to compile by fixing the errors one by one. Now it is not detecting the pn532. Not sure if the board is toast from desoldering that one header or if my "fixes" didn't really fix it. Giving up on this one for now. It has an external antenna. I tested in on my itead module and the read distance was horrid on regular tags, nothing with the ring.
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That's weird, it's pretty much what happened to me the first time around - I ended up reinstalling the arduino sdk and starting again on the home computer after which it worked properly.
My laptop on the other hand has done the same thing and nothing I do seems to sort it out. That said I've got two versions of that particular library installed and I think that it might be making the sdk confused because of that.
The boards shouldn't fail that easily - got a picture man? I don't know how experienced you are with a soldering iron, but best is to have the iron set high and make contact with the solder/wick only briefly each time and give it time to cool in between hits. -
Oh also, depending on the interface if you mix up MISO/MOSI or SDA/SCL then it'll fail to detect.
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I think the board survived. Not much in the area, no apparent signs of too much heat, and I'm pretty sure that header is just a pass-through. Re-installing the SDK is probably a good idea. I just need to find some time to take a closer look at things. I have my family visiting this weekend and friends the following weekend, so busy getting my place in shape. The shield is plugged directly into my uno, so hopefully no issue there, but i will pull up the schematics when I get time and make sure everything is kosher with the lib.
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Ah cool, thought it might have been breadboarded in like mine are, directly plugged in is a lot easier at this point eh.
I definitely think uninstalling and reinstalling the SDK and libraries is the go. Make sure you've got copies, cos it'll ditch them all in the uninstall. Fingers crossed that'll do the trick! -
Ah cool, thought it might have been breadboarded in like mine are, directly plugged in is a lot easier at this point eh.
Yeah, I have a lib backup folder. I have had to re-install before to solve a lib issue, not sure why I didn't think of that myself!
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Same reason I installed the PN532 libraries wrong several times eh ;-)
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PN532 from Elechouse works great. I have a bunch here and I use them all the time. I use them with a nano too.. $10 for nano, $20 for pn532 afaik.. Major win!
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Also note I some some open pull requests to the elechouse PN532 elechouse library.. https://github.com/elechouse/PN532/pulls -- feel free to comment on them to get them merged in.. The elechouse guys are a pretty slow..
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PN532 from Elechouse works great. I have a bunch here and I use them all the time. I use them with a nano too.. $10 for nano, $20 for pn532 afaik.. Major win!
Nice one, I think I'll take that as a 'go' to get more of them (I'd already pretty much decided they would be the weapon of choice!)
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Also note I some some open pull requests to the elechouse PN532 elechouse library.. https://github.com/elechouse/PN532/pulls -- feel free to comment on them to get them merged in.. The elechouse guys are a pretty slow..
Done and done.
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ok, so finally got the sketch to compile. Couldn't get it working on my windows 7 installation even after reinstalling arduino software. I fired up an XP VM, installed the arduino software and the sketch compiled first try. There must be some lingering data after uninstall that I need to take care of.
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Ah cool, so is the board working any better at the moment then? That car entry sketch I put here somewhere does a card identify/UID dump on a read for either mifare or NTAG so that might be worth trying.
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This post is deleted! -
@itzdarkoutthere I've also been playing with this module. I can't seem to get it to recognize any tags yet. Have you? 7 months ago....hopefully you didn't give up! :P
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Hi @flashoflight, it's been a while since Mike was online. I gather he's been busy!
So have you got the ITEAD module that he was playing with to start off? -
@Lokki Yup! I have been using this tutorial to try and set it up https://learn.adafruit.com/adafruit-pn532-rfid-nfc/breakout-wiring
I did wire it without the 4050 stepper though. I'm thinking maybe that is causing the issues. What do you think?
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Couple questions, did you get the shield or the board, and which interface are you using? SPI or I2C?
If SPI, you have the level shifter in circuit and working? If I2c you have the pullup resistors?
Oh also, which arduino are you using?The main issue with the itead units is that they have a max distance of ~3cm. That's really really low power, so the RF Field is going to have a hell of a time reading an NFC Ring.
You'll most likely get a reasonable performance with a standard tag and an infuriating one with a ring.
The Elechouse V3 reader unit has a maximum range of up to 8cm (mine works at that distance with fobs and a card) and so there's a far better experience with the ring which tends to read up to a couple centimeters away.
This is because the Elechouse unit has better power output and a better antenna.
