reminder
forgot we need pkg-config too
example headers for configuring keys etc
opening the device works if I give the connstring from cli, the default "" does not...
scan for devices if none is given on cli, something in the scan leaks memory btw...

Using device pn532_uart:/dev/ttyUSB0
==7746==
==7746== HEAP SUMMARY:
==7746==     in use at exit: 1,736 bytes in 5 blocks
==7746==   total heap usage: 516 allocs, 511 frees, 49,427 bytes
allocated
==7746==
==7746== Searching for pointers to 5 not-freed blocks
==7746== Checked 169,904 bytes
==7746==
==7746== LEAK SUMMARY:
==7746==    definitely lost: 0 bytes in 0 blocks
==7746==    indirectly lost: 0 bytes in 0 blocks
==7746==      possibly lost: 0 bytes in 0 blocks
==7746==    still reachable: 1,736 bytes in 5 blocks
==7746==         suppressed: 0 bytes in 0 blocks
==7746== Reachable blocks (those to which a pointer was found) are not
shown.
==7746== To see them, rerun with: --leak-check=full
--show-leak-kinds=all
==7746==
==7746== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==7746== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)