KeyDuino, Arduino NFC (PN532+ATMEGA 32U4) by MrStein
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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? :)
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That's awesome man, I like it. Looking forward to seeing your v2 with antenna connector! The bluebottle will be handy too.
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OMG that is awsome!
How did you do that?
Creat your own board is perfect. -
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 :)
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Wow
Can you read your private messages MrStein please
If you're Ok i want to talk to you in private for more informations -
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. -
How well does the antenna work from the back of the board, @MrStein?
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It would be awesome if, once these boards which are custom made for the ring are working well they were available for sale in the NFC ring store.
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It definitely would, @jasok2. Those and the car starter, it'd make it a one stop shop so to speak.
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@Lokki ; for the back it's the same, I lose 1,6mm (the bord size) for the reading distance ;)
It's difficult to make an open source project (I work with a company on some contactless projects so I have restrictions for provide antenna design) BUT I currently ask to my Boss for make an open source kickstarter. I wait for the answer. I think my Boss will accept to sell them on the NFC ring shop too.. (I wait for a better protype design)
If it's not possible, I will provide all the board files without the antenna but with a UHL connector for use a deported one and some indication for improve them :)).
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Work in progress for the version 2. I use 1 atmega 328 connected to the pn532 by SPI for the reading and a atmega32u4 (leonardo) for the programmable chip. Nano version will be difficult in 2 sides pcb...
I also put some headers on the i2C communication for add a Bluetooth low energy module (maybe I will add a NRF chip for an other board but I don't add the time for make and test a 2.4Ghz antenna yet.oh, I make a prototype of an arduino nano bluetooth (not tested yet), if you are interrested, here are the files;
http://www.partage-facile.com/TL9CEJT1GP/arduino_bluetooth.rar.html (click on "téléchargement régulier")
I was wondering why the pn532 from electrohouse and my first version became hot with the time. It's because there is not level converter (5v to 3.3v for the spi/i²C/HSU communication. That rectified in the version 2.
I also add a switch on an interrupt pin and a RGB led for select the communication mode (BLE mode, NFC mode, BOTH or nothing).
If you have any question / idea of application say that to me !
Ah, and "NFCDUINO" name is already take, someone have a idea? :D -
@MrStein Why don't you share all the files on github?
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Ah ah, that a good question, I never try that but you're right, it's time to switch :)
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Awesome stuff, @MrStein!
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In production, the v2 of nfcduino (now steinduino NFC) and "keyduino" in arduino nano size (I spend a lot of time on this one ^^').
Keyduino can log you on you pc with the nfc ring. Of course you can use it for a lot of other projects :D.
Hope they will work fine :) -
Oh wow look at that Nano one, that looks mad exciting!
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Yeah, I love it. Definitely want one of those!
@MrStein even more awesome would be if you could make the usb end double sided. -
@Lokki That a good idea but the ground is also around the connector package (on the female connector) so you will have a risk of short circuit if you reverse it...
Thanks for the comments! -
@MrStein check out the connector these guys did, it's double sided and doesn't short (I've got one).
http://www.ractiv.com/ -
@Lokki I asked Pierre to send me a prototype board so I will look at it and create a video in English :)
