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Rfid Reader Suli


RDM 125KHz card mini-module is designed for reading code from 125KHz card compatible read-only tags and read/write card . It can be applied in office/home security, personal identification, access control, anti-forgery, interactive toy and production control systems etc.


  • Support external antenna
  • Maximum effective distance up to 50mm
  • Less than 100ms decoding time
  • UART TTL interface
  • Support EM4100 compatible read only or read/write tags
  • Built-in external bi-color LED and buzzer driver
  • Small outline design


This is a Suli-Compatible Library, You Should Download Suli for your platform, please refer to

If you can't find Suli for your platform, please contract us, If you can port it yourself and pull request to us, We'll be appreciated.

For Arduino:

Just like you use the other Library, What's different is you should download Suli for Arduino First, remember that just put Suli for Arduino to your Arduino libraries folder.

For non-Arduino Platform:

For a non-Arduino platform, what you need is xxx.h and xxx.cpp(you can change it to xxx.c while your compiler can't support c++), the other files like xxx_Arduino.h and examples is for Arduino, you can just delete them.

This software is written by Loovee for seeed studio
and is licensed under The MIT License. Check License.txt for more information.

Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.

Seeed Studio is an open hardware facilitation company based in Shenzhen, China.
Benefiting from local manufacture power and convenient global logistic system,
we integrate resources to serve new era of innovation. Seeed also works with
global distributors and partners to push open hardware movement.


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