Unable to open NFC device spi using pn532 SHIELD on rasp pi zero

Question

I have a pi zero v1.3:

PI – pn532

5v to 5v
gnd to gnd
BCM10 to MOSI
BCM9 to MISO
BCM11 to SCK
BCM5 to SS

I think the issue is BCM5 to SS? I believe this should be CE0 or CE1?

I have closed both SEL0 and SEL1. The only other thing is instead of using the DI/O 1-6 corresponding to the “MISO/MOSI/ETC”, I plugged the wire directly into the hole for MISO/MOSI/ETC.

Any help would be awesome!!

Link to the product: https://learn.adafruit.com/adafruit-pn532-rfid-nfc/shield-wiring

Thank You,

I’ll have to find it.Is there another it should connect to? — Denis, yesterday
You might like to show us a photo of your module, similar to the photos in these NFC questions: (1) stackoverflow.com/questions/60819793/…, (2) raspberrypi.stackexchange.com/questions/109773/…. Cheers. — tlfong01, yesterday
I googled the tutorial for your module and found it is for I2C. (3) learn.adafruit.com/adafruit-pn532-rfid-nfc/shield-wiring. Actually your module can do I2C, SPI, and UART. My answer in Ref 1 above is for PN532 in I2C mode, and I successfully followed the libnfc tutorial to setup the mdules OK. I can show it in SPI mode if you prefer to do SPI. BTW, the tutorial in your mdoules is for Arduino, you need to find other NFC tutorials for Rpi, such as libnfc for PN532 or simpleMFRC522 etc. — tlfong01, yesterday
In case you really prefer to do SPI, you need to first make sure your SPI setup is correct, by doing the SPI loopback test. See this for more details: “SPI NFC Module Testing Part 3 – Troubleshooting SPI Software and Hardware using LOOPBACK”: raspberrypi.stackexchange.com/questions/109773/…. You may also like to use a python program to read/ping the NFC module’s “Version” register to make sure the NFC module not bad, and more or less working OK. — tlfong01, yesterday
I have also listed demo code in my answers above on how to read a SPI “version/ID” or “config” registers. If you can show me a photo of your module, then I can give more details on how to connect MOSI to MISO in a cross-over/loop, and also how to connect the CLK/MOSI/MISO/SS to both Rpi’s buses: SPI 0.0, 0.1, 1.0, 1.1, 1.2 etc. — tlfong01, yesterday
Your module and accompanying tutorials seem to be 8 years old and for Arudino only. I guess you need to find more up to date Rpi compatible tutorials such as libnfc or simpleMFRC.References:(4) Adafruit PN532 NFC/RFID Controller Shield for Arduino 2012 [Product sheet] adafruit.com/product/789 (5) Adafruit PN532 NFC/RFID Controller Shield for Arduino 2012 [Tutorial] learn.adafruit.com/adafruit-pn532-rfid-nfc (6) Adafruit PN532 NFC/RFID Controller Shield for Arduino 2012 [Wiring] learn.adafruit.com/adafruit-pn532-rfid-nfc/breakout-wiring — tlfong01, yesterday
Having said above, there is indeed update of the above tutorials more Rpi, but using CircuitPython/MicroPython. Byt I think Ccircuit does not run very smoothly in Rpi. But anyway, you can try your luck: (6) Adafruit PN532 NFC/RFID Controller Shield for Arduino 2012 [Rpi/MO Circuit/Micro Python] learn.adafruit.com/adafruit-pn532-rfid-nfc/python-circuitpython. Good luck and cheers. — tlfong01, yesterday
Hey thank you for all of this!! I checked the spi an that was good. Here is what I posted in the forum. I looked it up and matched the arduino connections to the shield and I have rewired up the nfc pn532. I will post a new photo tonight but it is still not workin 😦 forums.adafruit.com/viewtopic.php?f=60&t=164398 — Denis, 8 hours ago
Your forum discussion is good. If you know your SPI thing is OK, then you can try the libNFC right way. I found that AdaFruit also recommended libNFC way back in 2010! I vaguely remember Lada Ada saying that SPI is not reliable, so she chose I2C. Of course no harm trying it. By the way, I am drafting answer with some pictures, so we can compare and contrast. I only tried libNFC’s I2C mode. So it would be nice if you try it first, and I will follow! 🙂 — tlfong01, 7 hours ago
One more thing before I forgot: You asked about the pin “D5” referred in the Arduino guide. I guess that refers to Arudono UNO R3’s “D5”, which means “Digital pin number 5”. For Rpi, perhaps you need to read the libNFC guide which Rpi GPIO pins are referring, for the “Reset” and “Interrupt” purposes. — tlfong01, 7 hours ago
The libNFC test in SPI mode is as easy as I2C. You may find the tutorial by the Wilfrid Laurier Uni good (Ref 6, 7). Cheers. — tlfong01, just now