NFC Problem

[aleynasarcanli]

Hello everyone, I need some help. How can I use my nfc shield with raspberry pi ? my shield link below. I dont know which pins I must use, I must comunicate them with python. Please help, this is my homework

[texy]

Hi and welcome to the forum.
Well for one thing you need to do your own homework, otherwise you will not learn anything
Secondly you have not supplied the promised link to for the nfc shield................

Texy

[aleynasarcanli]

oh, I am sorry I forgot link, ok. I added. I am searching for a long time, but i didnt find anything about it, now I dont have a much time, i must comunicate raspberry pi and nfc shield, and I must make python script for take any nfc card's uid. shield link below

http://www.seeedstudio.com/wiki/NFC_Shield_V2.0

[DougieLawson]

It's an SPI device, so connect the MISO, MOSI (on the ICSP header) and pin#10 (CS) to the SPI pins on your RPi.

You should then be able to use the python-spidev library to communicate with it.

[aleynasarcanli]

Thank you mr Lawson, but I tried everything, it is not working. I cannot find when I run cat /dev/spidev

[DougieLawson]

SPI needs to be enabled with a config.txt parameter

Code: Select all

dtparam=spi=on

Once you add that then /dev/spidev0.0 and /dev/spidev0.1 will appear.

[aleynasarcanli]

Ok, I am trying now

[aleynasarcanli]

mr Lawson, I found raspberry spi pins and attached it to the nfc board, nfc pin(10 cs pin) attached raspberry pi pin gpio 8 [ce(0)] and my code below, nothing working, always response "0" do you any idea ?

Code: Select all

import spidev
import time
spi = spidev.SpiDev()
spi.open(0,0)
while True:
   resp = spi.xfer2([0x00])
   print resp[0]
   time.sleep(1)

[DougieLawson]

I'd start by reading it with an Arduino, since you've got ready made code for that.

[aleynasarcanli]

Anyone for help ?

[texy]

Looking at the spec it's rated at 5v. The pi requires a 3v3 input so maybe it's not comparable.
Texy

[iyosch]

hello.. have you tried this viewtopic.php?f=45&t=78966&p=560905&hilit=pn532#p560905
to setup the hardware and the libnfc setup for raspberry pi
and perhaps this https://learn.adafruit.com/adafruit-nfc ... ing-libnfc
and i guess someone already make your project http://www.instructables.com/id/Attenda ... -software/
Tell me if you made progress.. hope that helps..