Hi, today I received my Nfc arduino board from china.
Here are the first picture and caracteristics:

-> Atmega 328
-> pn532 connected by uart
-> antenna designed for the NFC ring (but it's need some modifictions for the according circuit)
-> FT232 (USB to UART)
The other caracteristics are the same than the arduino uno (3v3/5 v output,... SPI, I²C, UART)

Reading;
-3cm for normal card tag
-2cm for badge tag
-1cm for the nfc ring....

I thing the according circuit isn't as good as the simulation so I expect a bigger reading distance with the version 2. But with this configuration it's still better than the PN532 shield with my NFC rings (normal ring) :)

The version 2 (WIP) will have:
-> uhl connector for a deporting antenna
-> Bluetooth loow energy module
-> MSP430 proc (not sure)

What do you thing about that? :)

D-1 ! :)

After 1 year, the keyduino nano is available! :D
You can found the board at elecrow for 25$ (here)

It's still a ATMEGA32u4 but I redesign the NFC antenna and add few ameliorations.
Currenlty I try some project like communication with a credit card, HCE communication, etc. If you have any cool projet to suggest with or without the NFC ring, tell me !

Some news!
Today I start working with a friend on the according circuit,

(beautiful no?)

That improve the reading distance of the big tag (badge -> 3cm now) but the reading distance of the ring is still 1cm...

I will work more on the antenna design, and I expect found something.

First picture from china:

Normal one:

As you can see, there are 2 buzzer pad in more for identification application :)
Nano one:

I really like the black PCB with white silkscreen :D
For the nano one, the connector is maybe a little bit too big, btw it will be a male connector instead of a female one.

Hi, thank you for the support :)
The KeyDuino normal will be a KickStarter soon (in november normaly)

Here is a tutorial that allow you to control your car doors by a NFC communication;

code here : http://keyduino.forumsactifs.com/t24-nfc-doors-unlock
Lib and APK here: https://github.com/CITCEuraRFID/KeyDuino
NFC ring code : KeyDuino lib>example>relay shield

Hi,
The actual design antenna of the current shield are not well designed for the small tags like badge and nfc ring, but the pn532 shield is one of the less worst for the NFC ring. (TRF7970A work too).
But the inductive field is not enough for have a good reading distance...

Actually, I work on a arduino NFC & arduino nano NFC with a antenna / according circuit designed for the nfc ring. With the test with a RC522 reader I can read to ~2cm. Now I wait the current board with a PN532 from china for some test. After that I would like to make a Kickstarter with all schematics in open source (antenna design too), but it's not sure yet. Maybe you can be interested by this issue?

New eagle project:

A PN532 chip with the resonnant circuit (a friend working on a more suitable antenna for the NFC ring). Connexion by SPI.

******link for the pn532 ******

this is for a project of a radio frequency switch with nfc control.. I have not yet the implenter technology for the PN532 (0.2mm space between pins). So I'll see if the mechanical engraver can achieve the board or if I should use a QFN32 adapter -> DIP 32

I also working on a simular project using a chip TRF but it is related to my job and I can not disseminate plans ... sorry!

So I make the board with EAGLE and there are made in china, with MAKERSTUDIO (low cost: 10boards for 10$. and assembling the components is not expensive ;) ).

Oh, I forgot to say but I also have a arduino nano version in progress :)

After 1 year, the keyduino nano is available! :D
You can found the board at elecrow for 25$ (here)

It's still a ATMEGA32u4 but I redesign the NFC antenna and add few ameliorations.
Currenlty I try some project like communication with a credit card, HCE communication, etc. If you have any cool projet to suggest with or without the NFC ring, tell me !

If your antenna + according circuit is matched at 13.56Mhz, there are no problem but I think it will be difficult to find an antenna that match with the according circuit currently on the keyduino and you will need to change some component value to improve your reading range ;)

Hi Parviz, sadly I don't sell any prototype due to legal responsability, if you only need to unlock the car by NFC, you can follow this easy step by step tutorial: http://www.instructables.com/id/NFC-Car-Door-Control/

Bye,
Pierre

For now, the motor start with a defined time, there are no check if it's really launch or not.
If you want, you can connect a optocoupler on the pin n°3 of the header "EXT" and connect the optocoupler to the ODB2 pin 7 ;)

It works, you have to click on "téléchargement gratuit (vitesse NORMALE)" then wite the captcha and click on "télécharger ce fichier".
There are only the layout and not the schematics but I can upload both if you want.

Hey @Laszlo, we already launch a new production of 100 boards, in fact there are 96 boards lefts ;)

Currently when you buy a pack on elecrow, it's the same design than the KS version but there are some little change:

• reading distance a little bit improved thanks to a new matching circuit
• all pack come now with a big deported antenna, that can read 2016 nfc ring only
  I don't know if I relaunch another production after this stock, as the sales decreases quickly.

But I currently I work on 2 designs:

• the keyduino nano (same than the normal one but smaller)
• ozOne, a NFC reader with wifi, LEDs and LIPO charger

Keep me in touch if you're interested :)

Bonjour à tous, KeyDuino est disponible sur ELECROW pour 40$ (FDP out) avec une petite antenne, il n'en reste que 12 disponibles!

KeyDuino is now available on ELECROW for 40$, there are only 12 boards lefts!
http://www.elecrow.com/keyduino-p-1620.html

Here is a tutorial that allow you to control your car doors by a NFC communication;

code here : http://keyduino.forumsactifs.com/t24-nfc-doors-unlock
Lib and APK here: https://github.com/CITCEuraRFID/KeyDuino
NFC ring code : KeyDuino lib>example>relay shield

Hey Logan,
It's a good question, I currently make a tutorial for the doors opener and use a push button to start/stop the KeyDuino.
For the NFC starter, I use the temporary light (that allow 30s of supply to scan the ring/tag).

I don't know how long you can use a battery if you use like 150mA, but I think it's a bad idea to "always powered" something in your car ;)

How, just for your information, if you have any question/ rem related to keyduino; please sen them on the keyduino forum, so me and my friend can answer to your question :)
http://keyduino.forumsactifs.com/

Hey !
For now, the small antenna's orders are closed but some of them will be selled by ELECROW with the keyduino soon.
I take the decision to add some free antenna in these pack :
-DELUXE CLASSIQUE
-DELUXE NORMAL
-MASTER
But if you didn't order one of them, and your really want a deported antenna, please contact me with your KS account by message.
Also note that you don't need any deported antenna to read the NFC ring as there is an integred antenna. And that the large antenna work really fine with the 2016 ring.

Bye,
Pierre