KeyDuino, Arduino NFC (PN532+ATMEGA 32U4) by MrStein
-
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?
-
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.
-
It definitely would, @jasok2. Those and the car starter, it'd make it a one stop shop so to speak.
-
@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 :)).
-
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?
-
Ah ah, that a good question, I never try that but you're right, it's time to switch :)
-
Awesome stuff, @MrStein!
-
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!
-
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 :)
-
Awesome, I'll be looking forward to hearing how it goes @johnyma22!
-
Wow the nano one is incredible.
How can I make/get one? -
I start a prototype today so I can't say when the final design will be done... (soon I hope ! )
I send you the board tomorrow @johnyma22 , there are some mistakes with the V1; pn532 became hot, baudrate fixed at 15200, uart configuration,... (you will see) ;)
@Lokki Oh you're right for the USB, it will be really cool if I can do that! :D
-
@MrStein, it would be absolutely awesome if it was able to be plugged in upside down. All they appear to have done is sunk the contacts down a whisker on both sides so that it doesn't short circuit on the shield. Seems like a pretty simple solution to the age old usb problem of never plugging in properly the first two times!
So will you be doing this one in association with your work, or looking at a kickstarter?
-
I am currently an apprentice so I would like to make a kickstarter with my work for that project (as final project study). :)
