SCM3712 is not in the compatibility matrix because you're the first one to mention this reader and no one from the development team had a chance to test it yet.
That said, given that you say it's based on PN533 without additional microcontroller and that some versions claims compatibility with NFC p2p, I'm pretty confident it should work the same as SCL3711.
I could not find the product on the new Identive website (former SCM) but I found a datasheet here:
http://www.txsystems.com/download/datas … cm3712.pdf
Be careful that apparently there are three versions of SCM3712:
* SCM3712 NFC
* SCM3712 EA: same as NFC but requires external antenna
So you need SCM3712 NFC if you want to use it also for the NFC fonctionalities.
I see the SCM3712 (non-NFC) claims slightly better reading range so they probably boosted a bit the analog part with the consequence of disrupting NFC support (my guess) in a similar way ASK LoGO improves ISO14443B at the cost of NFC compatibility.
Final remark: as for SCL3711 you should be able to use it with libnfc at the condition that you don't use the PCSC driver
We'll be happy to hear about your experience with this reader.