Espen

Not sure what you mean by "adapt", but you can control the antenna gain using the _RFCfgReg_, as documented in the [datasheet](http://www.nxp.com/documents/data_sheet/MFRC522.pdf) (9.3.3.6, page 59). Something like this in `MFRC522_Init`:...

Yeah that should work. I did some testing with this a long time ago, with little notable effect. Though in retrospect I think that was due to the antenna being...