node-red-contrib-jetson-mfrc522

A [Node-Red][1] node that allows you to read NFC tags with an RC522 card reader. Tested the node on a Jetson Nano.

Requirements

• [Python3][2]
• [Jetson.GPIO][3]
• [Jetson-MFRC522][4]

Enable SPI

• Next, configure the Jetso for SPI, use the command

    sudo /opt/nvidia/jetson-io/jetson-io.py

• Select Configure Jetson 40pin Header
• Then, Select Configure Header pins manually
• Select spi1 and then select exit
• Select Save pin changes
• Select Save and reboot to reconfigure pins
• Last, use the following command to enable spidev

sudo modprobe spidev

WIRING

You need to connect to RC522 card reader to the following pins:

|      | PIN |
|------|-----|
| SDA  | 24  |
| SCK  | 23  |
| MOSI | 19  |
| MISO | 21  |
| GND  | 6   |
| RST  | 22  |
| 3.3V | 1   |

NOTES

Currently this project only support reading tags on SPI bus 0.0. Also, the node only supports reading tags, not writing tags.

[1]: https://nodered.org [2]: https://www.python.org [3]: https://github.com/NVIDIA/jetson-gpio [4]: https://github.com/SantaCRC/Jetson-MFRC522