Library for parsing manchester/biphase encoded data from EM4100 tags

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1

Hi.

I bought a 125kHz RFID kit from eBay. It has serial out (at 9600 baud) and manchester data out.
I have written a library to decode the manchester (or biphase) signal and extract EM4100 data (8+32 bits).
Tested with manchester cards using 64 oscilator-periods per bit, but should work with 16/32/64 period variants and both manchester and biphase encoding, and frequencies from 100-150kHz.

Code at GitHub: AccessThing/Arduino/libraries/EM4100 at master · Sthing/AccessThing · GitHub
Rant about the background: AccessThing: Decoding/reading 125kHz RFID tags - live at GitHub

I tentatively added a link from the Playground (Arduino Playground - HomePage) - please correct me if that was wrong.

The manchester output from my reader is quite noisy, so the manchester extraction alone might be useful in other cases.

This is my first attemt at an Arduino library, so there a probably some rough edges. Beware! :wink:

/Søren Thing.

2

I won't use it, but Karma++ for you for registering just to share your work :slight_smile:

3

Super..

I have one question..

This library can work with Arduino and ESP8266 boar?

(On Aruinu Uno works great ..)

Jarek