Can someone tell me (I think not only I'm interested in it) how to write a 125 kHz tag or card? There is a video on Youtube where this Russian guy makes his module from scratch, but I want ready-made one.


I know I've mentioned read also in the title, but read is fairly simple with modules available (e.g. RDM6300 and many others on eBay).

  • please provide a datasheet for the module that you have chosen ... maybe someone here can point you to the appropriate library ... right now, your question is not related to the Arduino in any way – jsotola Sep 30 at 23:28