Specification:

Operating current of 13-26mA / DC 3.3V

Idle Current :10-13mA / DC 3.3V

Sleep current: <80uA

Peak current: <30mA

Operating Frequency: 13.56MHz

Supported card types: mifare1 S50, the mifare1 S70, Mifare UltraLight, Mifare Pro, mifare DESFire

Product physical properties: size: 40mm x 60mm

Environmental Operating temperature: -20-80 degrees Celsius

Environment Storage temperature: -40-85 degrees Celsius

Ambient Relative Humidity: 5% -95%

If you’re using an Arduino Uno the pins map as follows:

• Reset > Pin 5
• SS > Pin 10
• MOSI > Pin 11
• MISO > Pin 12
• SCK > Pin 13
• Ground > Ground
• 3.3v > 3.3v

Download example here

void setup() {Serial.begin(9600);            // RFID reader SOUT pin connected to Serial RX pin at 2400bps// start the SPI library:SPI.begin();pinMode(chipSelectPin,OUTPUT);       // Set digital pin 10 as OUTPUT to connect it to the RFID /ENABLE pindigitalWrite(chipSelectPin, LOW);     // Activate the RFID readerpinMode(NRSTPD,OUTPUT);        // Set digital pin 10 , Not Reset and Power-downdigitalWrite(NRSTPD, HIGH);MFRC522_Init();}

Contains:

1x RFID Reader ;

1x Mifare Card;

1x Mifare TAG Keychain;

2x Single Row Pin