Difference between revisions of "PN532 NFC HAT"

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4. Connect USB to TTL module to UART1 interface (PA9->RX, PA10->TX) of STM32 and PC.
 
4. Connect USB to TTL module to UART1 interface (PA9->RX, PA10->TX) of STM32 and PC.

Revision as of 10:48, 10 August 2019

PN532 NFC HAT
PN532 NFC HAT

PN532 NFC HAT for Raspberry Pi, I2C / SPI / UART
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Instruction

This is a Raspberry Pi NFC HAT based on PN532 operating in the 13.56MHz frequency range. It supports three communication interfaces: I2C, SPI, and UART.

NFC (Near Field Communication) is a wireless technology allows contactless point-to-point data communication between devices within a short distance of 10 cm. It is widely used in applications such as access control system, smart tickets, meal card, etc.

Based on the popular NFC controller PN532 with multi interface options, this HAT will easily enable NFC function for your Raspberry Pi.

Features

  • Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
  • Onboard PN532 chip, supports various NFC/RFID cards like MIFARE/NTAG2xx, etc.
  • Three interface options: I2C, SPI, and UART, configured via jumpers and switches
  • Breakout control pins, for easily connecting with host boards like STM32/Arduino
  • Comes with development resources and manual (examples for Raspberry Python/C, STM32, Arduino)

Note

  • This module can only be used to write/read NFC card whose password is known, it cannot be used for decrypting encrypted NFC card. For example, the default password of all blocks of Mifare Classic card is 0xFFFFFFFFFFFF. the Mifare card can be written/read only when the default password isn't changed
  • This module cannot be used to copy card, unless that the card use default password.
  • This module cannot be used to simulate NFC card. Because ID of NFC card are 4 bytes, because of security policy of PN532, it will set the first byte of simulate card to 0x08. For more details, please refer to http://www.nfc-tools.org/index.php?title=PN53x%E3%80%82

Quick testing

You can quick test the module by connecting it to PC with USB to TTL module instead of Raspberry Pi

1. Hardware connection
PN532 NFC HAT USB to TTL Module
3V3 3.3V
GND GND
TX RX
RX TX
2. Set L0 to L and L1 to L by jumpers
3. Connect USB to TTL Module to PC by USB cable
4. Open Serial assistant software, set it
  • 波特率(Baud rate):115200
  • 数据位(Data bits):8
  • 停止位(Stop bits):1
  • 校验位(Parity):None
  • 流控制(Flow control):None
5. Check "HEX发送” and “HEX显示”
PN532 NFC HAT.jpg
6. Select correct serial port and open
7. Send data below to wake up FN532 module:
55 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF 03 FD D4 14 01 17 00

(Please refer to PN532 User Manual HSU wake up condition Chapter)

The response from PN532 module should be:

00 00 FF 00 FF 00 00 00 FF 02 FE D5 15 16 00
8. Send data below to scan Mifare Classic card(The blue card provided, hereafter called as "card")
00 00 FF 04 FC D4 4A 01 00 E1 00

Closing card to coil part of module, module scan it and response:

00 00 FF 0C F4 D5 4B 01 01 00 04 08 04 XXXXXXXXXX 00

XXXXXXXXXX in response data is ID (3 bytes) and checksum (1 byte) of card.(Please refer to PN532 User Manual InListPassiveTarget Chapter)

Using demo codes

PN532 NFC HAT supports UART, I2C and SPI interface. You can use them according to your situation.After connecting PN532 NFC HAT (hereafter called as PN532) to Raspberry PI, then set the L1, L0 jumpers and DIP switch for different interfaces.

Choose the interface:

  • UART:By default, UART interface of Raspberry Pi is used for Sheell debugging. If you use serial port for degbugging, you need to add an USB to TTL module for communicating just like what we do on #Quick testing. In this case, the serial port is mapped as ttyUSB0 instead of ttyS0
  • I2C: Raspberry Pi doesn't supports I2C Clock Stretching. However, PN532 may use Clock Stretching (slaver pull-down SCL pin of I2C interface). Clock Stretching cause that Raspberry Pi cannot control all I2C devices, therefore, if you need to connect other i2C device, we do not recommend you to use I2C interface.
  • SPI:We use D4 (BCM) pin as Chip select pin of SPI interface. Take care about GPIO conflict.

Raspberry Pi examples

Download demo code from #Resources, unzip and copy raspberrypi folder to /home/pi of Raspberry Pi. You can firstly copy it to /boot of SD card, then copy it to /home/pi.

SPI Interface

1. Set L0 toL and L1 to H by jumpers

2. Connect RSTPDN->D20 by jumper

3. Set DIP switch to

SCK MISO MOSI NSS SCL SDA RX TX
ON ON ON ON OFF OFF OFF OFF
PN532 NFC HAT-2.jpg

4. Connect PN532 NFC HAT to Raspberry Pi

Connect PN532 NFC HAT to Raspberry Pi via SPI interface
PN532 NFC HAT Raspberry Pi (BCM)
SCK SCK
MISO MISO
MOSI MOSI
NSS P4 (D4)

5. Enable SPI interface

Open Terminal of Raspberry Pi,use command: sudo raspi-config

Choose Interfacing Options -> SPI -> Yes

6. Run demo codes(Use example_get_uid.py and rpi_get_uid.c as example)

Open Terminal, navigate to directory of demo codes

cd ~/raspberrypi/

1) python code:

Enter directory of python codes: cd ~/raspberrypi/python/

Modify example_get_uid.py file,set the initialize code as :

pn532 = PN532_SPI(debug=False, reset=20, cs=4)
#pn532 = PN532_I2C(debug=False, reset=20, req=16)
#pn532 = PN532_UART(debug=False, reset=20)

Save after modifying, then run the codes with command:

python3 example_get_uid.py

2) C codes:

Enter directory of c code: cd ~/raspberrypi/c/example/

Modify rpi_get_uid.c file, set initialize code as:

PN532_SPI_Init(&pn532);
//PN532_I2C_Init(&pn532);
//PN532_UART_Init(&pn532);

Save and compile:sudo make

Run the code:

./rpi_get_uid.exe

7. Expected result:Close card to coil part of PN532, the UID of card is read

UART interface

1. Set L0 to L and L1 to L by jumpers

2. Connecting RSTPDN ->D20 by jumper

3. Set DIP switch to

SCK MISO MOSI NSS SCL SDA RX TX
OFF OFF OFF OFF OFF OFF ON ON
PN532 NFC HAT-3.jpg

4. Connect PN532 to Raspberry Pi

Connect PN532 NFC HAT to Raspberry Pi via UART interface
PN532 NFC HAT Raspberry Pi
RX TX
TX RX

5. Enable Serial port. By default, serial port is used for Shell debugging.

Open Terminal of Raspberry PI and run command: sudo raspi-config

Choose Interfacing Options-> Serial -> No -> Yes

【Note】You need to restart Raspberry Pi after enabling serial port

6. Run demo codes(Use example_get_uid.py and rpi_get_uid.c as examples)

Open Terminal and navigate to directory of demo codes:

cd ~/raspberrypi/

1) python code:

Enter directory of python code: cd ~/raspberrypi/python/

Modify example_get_uid.py file, set initialize code to:

#pn532 = PN532_SPI(debug=False, reset=20, cs=4)
#pn532 = PN532_I2C(debug=False, reset=20, req=16)
pn532 = PN532_UART(debug=False, reset=20)

Save.Then run code by command:

python3 example_get_uid.py

2) C code:

Enter directory of c code:cd ~/raspberrypi/c/example/

Modify rpi_get_uid.c file, set initialize code to:

//PN532_SPI_Init(&pn532);
//PN532_I2C_Init(&pn532);
PN532_UART_Init(&pn532);

Save then compile code: sudo make

Run code:

./rpi_get_uid.exe

7. Expected result:Close card to coil part of PN532, the UID of card is read

If demo code of UART run failed, you can test serial port by this example
cd ~/raspberrypi/python/
python3 example_uart_hex.py

Enter data and sent, data sent and received should be printed on terminal as expected. e.g. sent data below to wake up PN532:

55 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF 03 FD D4 14 01 17 00

The response data should be:

00 00 FF 00 FF 00 00 00 FF 02 FE D5 15 16 00
I2C interface

1. Set K0 as H, L1 as L by jumpers

2. Connect RSTPDN ->D20 and INT0 -> D16(avoid from Clock Stretching) by jumpers

3. Set DIP switch to

SCK MISO MOSI NSS SCL SDA RX TX
OFF OFF OFF OFF ON ON OFF OFF
PN532 NFC HAT-3.jpg

4. Connect PN532 to Raspberry Pi

Connect PN532 NFC HAT to Raspberry Pi via I2C interface
PN532 NFC HAT Raspberry Pi
SCL SCL
SDA SDA

5. Enable I2C interface

Open Terminal of Raspberry Pi and run command: sudo raspi-config

Choose Interfacing Options-> I2C -> Yes


6. Run code(Use example_get_uid.py and rpi_get_uid.c as examples)

Open ternimal and navigate to directory of demo codes:

cd ~/raspberrypi/

1) python code:

Enter directory of python code: cd ~/raspberrypi/python/

Modify example_get_uid.py file, set initialize code to:

#pn532 = PN532_SPI(debug=False, reset=20, cs=4)
pn532 = PN532_I2C(debug=False, reset=20, req=16)
#pn532 = PN532_UART(debug=False, reset=20)

Save, then run code

python3 example_get_uid.py

2) C code:

Enter directory of c code:cd ~/raspberrypi/c/example/

Modify rpi_get_uid.c file, set initialize code to:

//PN532_SPI_Init(&pn532);
PN532_I2C_Init(&pn532);
//PN532_UART_Init(&pn532);

Save then compile codes:sudo make

Run code:

./rpi_get_uid.exe

7. Expected result:Close card to coil part of PN532, the UID of card is read

Arduino examples

1. Make sure that you have installed Arduino IDE in your PC

2. Create a new folder in ...\Arduino\libraries (Installation directory of Arduino IDE) and named it as pn532

3. Copy files pn532.c, pn532.h, pn532_uno.cpp and pn532_uno.h to ...\Arduino\libraries\pn532 from Arduino demo codes

4. Demo codes is under examples\arduino (demo codes you download) directory

5. Herein we take Arduino UNO board as example

SPI interface

1. Set L0 to L and L1 to H by hy jumpers

2. Set DIP switch to:

SCK MISO MOSI NSS SCL SDA RX TX
ON ON ON ON OFF OFF OFF OFF

3. Connect PN532 NFC HAT to Arduino UNO:

Connect PN532 NFC HAT to Arduino UNO via SPI interface
PN532 NFC HAT Arduino UNO
SCK D13
MISO D12
MOSI D11
NSS D4
PN532 NFC HAT-5.png

4. Run codes(Use examples\arduino\uno_get_uid\ uno_get_uid.ino as examples):

Open uno_get_uid.ino file, set initialize code to:

PN532_SPI_Init(&pn532);
//PN532_I2C_Init(&pn532);

Compile and upload codes to Arduino UNO

Open Serial monitor, press Reset button of Arduino Uno to reset

5. Expected result: close card to coil part of PN532, the UID of card is read and printed.

I2C interface

1. Set L0 to L and L1 to H by jumpers

2. Set DIP switch to

SCK MISO MOSI NSS SCL SDA RX TX
OFF OFF OFF OFF ON ON OFF OFF

3. Connect PN532 NFC HAT to Arduino UNO

Connect PN532 NFC HAT to Arduino UNO via I2C interface
PN532 NFC HAT Arduino UNO
SCL A5
SDA A4
PN532 NFC HAT-4.png

4. Run code(Use examples\arduino\uno_get_uid\ uno_get_uid.ino as example):

Open uno_get_uid.ino file, set initialize code to:

//PN532_SPI_Init(&pn532);
PN532_I2C_Init(&pn532);

Compile and upload codes to Arduino UNO board

Open Serial monitor, press Reset button of Arduino UNO board to reset.

5. Expected result: close card to coil part of PN532, the UID of card is read and printed.

STM32 example

The development board used here is Open103C which is based on STM32F103CBT6.

Download project

1. Open project by keil software(...\MDK-ARM\pn532_stm32.uvprojx),Click Rebuild to compile project.

2. Choose programmer:Options for Target -> Debug-> Use,default: ST-Link Debugger。

3. Choose download method:Options for Target -> Debug选项卡 -> Settings -> Debug -> Port,Default: JTAG.

4. Connect Open board to PC by programmer. Note that you should power Open board separately.

5. Click Download to download project.

Hardware connection

1. Set L0 to L and L1 to H by jumpers

2. Set DIP switch to

SCK MISO MOSI NSS SCL SDA RX TX
ON ON ON ON OFF OFF OFF OFF

3. Connect PN632 to Open103C board

Connect PN532 NFC HAT to STM32F via SPI interface
PN532 NFC HAT STM32F103CBT6
SCK PA5
MISO PA6
MOSI PA7
NSS PA4
PN532 NFC HAT-5.png

4. Connect USB to TTL module to UART1 interface (PA9->RX, PA10->TX) of STM32 and PC.

5. Open serial assistant software, and reset Open103C

6. Expected result: close card to coil part of PN532, the UID of card is read and printed.

Resources

FAQ

Supports

Support

If you require technical support, please go to the Support page and open a ticket.