Build your own EasyCard payment system

With Raspberry Pi, RFID and Google Cloud

Setup Raspberry Pi

Go to https://www.raspberrypi.com/software/ to download the Raspberry Pi Imager, or download the OS manually from here.

In either method, for Raspberry Pi 4 with 4 GB+ RAM, 64-bit version of the Raspberry Pi OS is recommended. If you have downloaded the image manually, use https://www.balena.io/etcher/ (balenaEtcher) to flash a microSD card (with recommended capacity of 8 GB+) with the OS image.

For headless setup (setup without any monitor/KB/mouse) with Raspberry Pi Imager, please fill the necessary details in the below configuration page.

Connect Pi with MFRC522 RFID module

Please follow the below wiring diagram with the table guide to connect Pi with the rfid module.

MFRC522 Header	Diagram Colour	Pi Header	Notes
3.3V	Grey	1	3.3V
RST	White	22	GPIO25
GND	Black	6	Ground
IRQ	–	–	Not connected
MISO	Purple	21	GPIO9
MOSI	Blue	19	GPIO10
SCK	Green	23	GPIO11
SDA	Yellow	24	GPIO8

Raspberry Pi GPIO pin diagram is available here: https://pinout.xyz/

Mifare Classic 1K card memory dumps

1. Factory Formatted Card

2. NDEF Formatted Card

3. NDEF Formatted Card with text data

Recommended apps to play with NFC cards

1. NFC Tools: https://play.google.com/store/apps/details?id=com.wakdev.wdnfc

2. NFC TagInfo by NXP: https://play.google.com/store/apps/details?id=com.nxp.taginfolite

3. NFC TagWriter by NXP: https://play.google.com/store/apps/details?id=com.nxp.nfc.tagwriter

Slides for hardware section of this project

Build your own EasyCard payment system - Hardware

Build your own EasyCard payment system - Cloud