i posted this in the bar as it is my first library, that i have written, and i assume my code is laughable in this attempt.
it works with the RDM630 125Khz reader from eBay, like THIS.
it is very quick and dirty, and i mainly wrote it because i needed it for my alarm project. if anybody has one of those readers, feel free to test the code, beat it into submission, and let me know how i could make it better.
it is located on my GitHub.
anyway, i have to go to the store to get supper.