Plug the RFID module into the breadboard with enough space around it. Connect the VCC pin to the Arduino's 3.3V (not 5V), and ...

The naïve solution found in thousands of Arduino tutorials do the ... to a non-logic level when the CS pin is high, and check with a voltmeter. If MISO is driven high or low, you should put ...

Each of the 14 digital pins on the Arduino Uno can be ... SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins support SPI communication using the SPI library. LED: 13. There is a built-in LED ...