Question

Is there an SDA pin on the RFID Module?

(a) Yes

(b) No

Answer 1

The correct choice is (a) Yes

Best explanation: The RFID Module has an SDA/SS/Rx Pin which, when the SPI Interface is enabled acts as a signal pin, when the I2C Interface is enabled acts as a Serial Data Pin, and in case of UART Mode Activation acts as a Serial Data Input pin.