config
--------------
--prefix=/usr --sysconfdir=/etc --with-drivers=pn532_uart


/etc/nfc/libnfc.conf
---------------------
allow_intrusive_scan=true


/etc/nfc/devices.d/pn532_usb2uart.conf
-----------------------------------
name = "PN532 Breakout Board (USB-to-UART)"
connstring = pn532_uart:/dev/ttyUSB0