Link: https://pan.baidu.com/s/10fLV6zEWkEGFYDyL7z4ICA 
Extraction code: xgjl

[delivery list]
1. One rc522 Mini module;
2. One standard S50 blank card;
3. One S50 special-shaped card (key ring shape as shown in the figure);
4. One 7p row needle;

Module description:
Rc522 module is a Mifare card reading and writing module based on NXP RF base station chip. The module works at 13.56MHz frequency and meets iso14443a standard. It can support Mifare1 S50, Mifare1 S70, Mifare light, Mifare ultralight and Mifare pro. The module has the characteristics of easy to use, high reliability and small size, which can help customers apply the contactless card to the system conveniently and quickly.
Interface pin definition and module parameters

Module size 3.5mm * 2.5mm, super small size, easy to embed into your system
The working frequency is 13.56MHz
The working voltage is 2.5 ~ 3.6V
Working current using program routine, card searching current 20mA (3.3V power supply)
Support type mifire1 S50 S70 ultralight Pro
Working temperature - 25 ~ + 85 ℃

grade           IO type                Function description
3.3V         Power Supply        Power supply positive
GND        Power Supply             Power ground
RST                input                           reset
MISO            output             SPI port slave output
MOSI             input                SPI port slave input
SCK               input                  SPI interface clock
NSS               input                   SPI port selection