I'm thinking of setting up two NFC modules and making them communicate with each other. The modules advertise that their maximum effective distance is between 5-8cm, but I need minimum 10cm. I was wondering if the communication is between two modules and not between a module and a passive NFC device, I could double the range? I've read that NFC communications can be P2P so back and forth communication shouldn't be an issue.
Also if anyone knows of a good NFC module with higher range then do please share :). Right now I'm looking at this:
PN532 NFC RFID module V4(WIRELESS-NFC-PN532_V4)