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    Arduino and NFC

    Ideas for using NFC Rings
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    • Lokki
      Lokki Community Helper last edited by

      Sigh. I reckon I've got a dud. The adafruit setup for I2C reports that the PN532 is there, and ready, but the **** thing wont even read the tags that came with it.
      Next!

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      • T
        Taylor last edited by

        I've used my ring successfully with Adafruit PN532 breakout board. They also have a PN532 arduino shield.

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        • I
          itzdarkoutthere last edited by

          @Taylor

          I've used my ring successfully with Adafruit PN532 breakout board. They also have a PN532 arduino shield.

          Nice, thanks! How is the performance with the ring?

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          • T
            Taylor last edited by

            You know, I hadn't really tested that. I'll let you know after I run it through some tests. I [i:12xo79s3]can [/i:12xo79s3]tell you that the sweet spot is right at the 'base' of the antenna i.e. the side of the loop closest to the IC.

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            • Lokki
              Lokki Community Helper last edited by

              It's good to know someone is having a bit of luck! I'm stuck waiting on the postman again.

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              • H
                HoodedClaw last edited by

                My elechouse reader (looks like the same red one Lokki has) came today, and I've just spent a couple of hours trying to get it to work.

                Good news is it works with the supplied cards and arduino uno. I used the downloads from here

                HTTPS://github.com/elechouse/PN532

                Connected to I2C

                Literally just got it reading so still need to understand it more but those files are worth a try.

                Can't try it with anything else though...

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                • Lokki
                  Lokki Community Helper last edited by

                  Haha! I'm an idiot - all my issues were caused by not installing the PN532 libraries as seperate libraries.
                  The libraries contained within the PN532 directory have to be copied seperately into the Arduino libraries directory (sometimes I am really really bad at reading instructions).

                  Small red elechouse clone card reader is now working via I2C!

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                  • I
                    itzdarkoutthere last edited by

                    @Lokki

                    Haha! I'm an idiot - all my issues were caused by not installing the PN532 libraries as seperate libraries.

                    Nice! How's it working with the ring?
                    Basically I just need to find a module/antenna that can read the ring reliably through a somewhat thin layer of ABS plastic. Since I'm making the enclosure with my 3d printer, I have flexibility in terms of thickness, but obviously, thicker is better to ensure it can take some abuse.

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                    • Lokki
                      Lokki Community Helper last edited by

                      Now that I've actually done the right thing with the libraries I've had a pay around with the example files and the reader works perfectly with the rings every time. The only one it has minor issues with is the Alpha with the slightly dodgy carbon fiber that John ended up replacing. That one needs to actually contact the top of the board before it will make a good read. Every other inlay reads within 15mm or so. It's worth noting that the elechouse board reads best from the top where all the SMD components are mounted so any covering layer will need to be thin to get a good read.

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                      • Lokki
                        Lokki Community Helper last edited by

                        Yeah, now that it's working and I'm happy with it again it seems to be a really solid little unit. I'm not sure if you noticed, but the Arduino Uno next to it is actually a microduino unit. I'm going to see if I can set it all up as minimalistically as possible with just the reader, microduino core and a latching relay or two for the car engine start. If that works out well I'll see about adding a second reader for the driver's door!
                        It wont work as nicely in my skyline as it will eventually in my dodge because of the steering lock though. Has anyone ever seen an aftermarket electric fail-open latch that would work in a steering column?

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                        • I
                          itzdarkoutthere last edited by

                          Nice, thanks! I doubt I will go any thicker than 2mm, so seems like I would be good with that one. I have a SainSmart and SeeedStudio module that should be here Thursday. I really like the form-factor of that one though.

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                          • Lokki
                            Lokki Community Helper last edited by

                            Shield number two:
                            RC522, from ebay. Currently working with mifare cards only - I haven't been able to find much online at all for these, certainly not as much as for the other reader/writer.

                            A pic with the Elechouse module for size/layout comparison.

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                            • I
                              itzdarkoutthere last edited by

                              I've seen a few of these modules based on the MFRC522 around, haven't seen any that said they support NTAG.
                              I should have taken one last look at your list before I ordered. One of the modules I ordered is nearly identical. [url=http://www.amazon.com/gp/product/B00E37T2F0/ref=oh_details_o00_s01_i00?ie=UTF8&psc=1:2aw9qudf]SainSmart RC522[/url:2aw9qudf]

                              btw, I have 3 of these itead pn532 modules that I can't seem to get working with my ring. If you're interested, I wouldn't mind sending one your way to play around with.

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                              • Lokki
                                Lokki Community Helper last edited by

                                Yup, same device with a different colour eh. I hadn't found any reference to 'em being capable with the ntag203 but I figured I'd give it a shot and see what happened.
                                It's interesting, the rings don't even trip the reader off at all, so I guess the chip simply doesn't support them. I did see something regarding firmware higher than 1.6 for ntag203 but closed the page out of reflex and can't seem to find it again.

                                You... like the itead colours or something mate? I certainly won't knock back the offer, thanks.

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                                • Lokki
                                  Lokki Community Helper last edited by

                                  Ah, yes. That'll happen hey! The best laid plans of mice and men...
                                  I'm well practiced at that one!
                                  So outta curiousity, which units have you ended up going with for the plans? I have to say I'm likely to get more of the Elechouse/clone whatsis NFC module v3. I'm thinking 2 for the house and 2 for the car to start with. And maybe an extra one for the 2-way radio.
                                  I'm going to have to think of more things than need NFC.

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                                  • I
                                    itzdarkoutthere last edited by

                                    @Lokki

                                    Yup, same device with a different colour eh. I hadn't found any reference to 'em being capable with the ntag203 but I figured I'd give it a shot and see what happened.

                                    I had big plans and didn't consider incompatibility when I ordered them all those months ago. :mrgreen:

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                                    • I
                                      itzdarkoutthere last edited by

                                      My rc522 is working with the ring. It practically has to touch the board to read it, but it does work!
                                      [url=https://drive.google.com/file/d/0B5f9BUaIGPfgV3ZSX2tURjdKTFk/edit?usp=sharing:sre0fxji]Video[/url:sre0fxji]
                                      [url=http://www.sainsmart.com/sainsmart-mifare-rc522-card-read-antenna-rf-rfid-reader-ic-card-proximity-module.html:sre0fxji]module[/url:sre0fxji]
                                      [url=https://github.com/miguelbalboa/rfid:sre0fxji]lib[/url:sre0fxji]

                                      I've got a few of the Elechouse modules on the way. Definitely needs some more ideas for NFC! Unlock computer via NFC?

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                                      • I
                                        itzdarkoutthere last edited by

                                        And I am more of a programmer! I would have tested the seeed nfc shield already, but i soldered one of the headers on in the wrong direction :P Now I get to practice desoldering, hopefully the shield will survive.

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                                        • Lokki
                                          Lokki Community Helper last edited by

                                          Wahey! Nice one. I'll try out that library on mine and see if it does anything differently!

                                          Pretty much anything that you can trigger with a high/low or talk to via serial should work eh, as long as you're up to the task of coding for it! (I hate that part, I'm more a hardware guy)

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                                          • Lokki
                                            Lokki Community Helper last edited by

                                            lol, damn man. Desoldering from those boards really sucks at times. Just don't get it too hot ;-)

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