125KHz RFID Reader Module

RFID, which stands for radio frequency identification, enables data reading and identification of unique tags using radio waves. RFID modules operate on specific frequencies, requiring tags that match the reader module™s frequency.

In this article, we will design and implement a simple identification system using a 125KHz RFID module and the Wiegand protocol.

Features of 125KHz RFID Reader Module:

• Support external antenna
• Maximum effective distance up to 150mm
• Less than 100ms decoding time
• Wiegand interface
• Support EM4100 compatible read only or read/write tags
• Built-in external bi-color LED and buzzer driver
• Small outline design

Extra Notes:

Tip:

While the RFID module used in this article shares similarities in shape and structure with the RDM6300 RFID reader module, they differ in communication protocol and pinout.

The module used in this article works with the Wiegand communication protocol that includes two pins”DATA0 and DATA1”while the RDM6300 module has a Serial communication protocol.