NRF52 pair to NRF52 using NFC RFID tag with MAC address

[zachtos]

I asked about if NRF52 can pair to eachother without a PN532, but sounds like no, it can only read RFID tags.

So, how about if at factory we make RFID sticker/tag that have the MAC address of the central NRF52 radio, and if the peripheral reads the RFID tag, it enters pairing mode and connects to said central, perhaps the central may need a button depressed ?

So to pair, hold button on the central, it will look for an advertising peripheral. Peripheral will not advertise unless it reads a valid RFID tag with MAC address of central. If the MAC address matches the central, it will be added to the central's whitelist.

Is this possible?

If so, any easy suggestion to write quick tags at factory, perhaps a simple script that has the NRF52 chip send it's address to the the PN532 and write the MAC address to tags in set location?

[Krzysztof Zaraska]

How about:

• put PN532 in the central
• place peripherial close to the central
• press button on central
• central's PN532 reads peripherial's MAC address etc.
• central's PN532 writes its MAC address etc. to the peripherial
• peripherial starts advertising or whatever

[zachtos]

Excellent. Than I can accomplish the task by adding a Reader chip NXP MFRC630, PN532 or MFRC522. I think if peripheral taps to central which is connected to reader chip, then reader will send the MAC address of the peripheral to the central, then the central will connect with proper information to the always advertising peripheral. So only need to touch to pair in this scenario, which is even better I guess. Just have to add a bit more cost than I intended to the product.