125KHz RFID Reader Module, USB Output, Plug-and-Play

This 125KHz RFID reader connects directly over USB, reading standard low-frequency RFID cards and keyfobs and typically outputting the card's ID as keyboard-style text input, the same approach used by many access-control and attendance systems. That USB output format is what makes it genuinely plug-and-play: on most systems, no special driver software is needed, since the reader's output arrives as ordinary typed characters that any text field, spreadsheet, or custom application can capture directly.

125KHz is the long-established low-frequency RFID standard, compatible with the widely used EM4100-family cards and keyfobs found in countless access control systems, time-and-attendance terminals, and simple identification projects. Because this frequency and card format are so well established, compatible cards and fobs are inexpensive and available from numerous suppliers, making the reader straightforward to deploy without being locked into a proprietary card ecosystem.

Being a reader only, this module reads existing card IDs rather than writing or programming cards itself, which suits projects like simple access logging, attendance tracking, or using existing RFID cards as a login or identification method for a custom application. The direct USB connection also means it can be used with virtually any computer or single-board computer with a USB port, without needing to wire up a separate serial-to-USB converter or power supply.

Builders and small businesses setting up a simple access control, attendance tracking, or asset-identification system using the widely available 125KHz RFID card format, without wanting to deal with a USB-to-serial interfacing step, will find this reader's direct USB keyboard-style output the most straightforward way to get card data into a computer or application.