Hi,
I need to write the same kind of NDEF data to ~20 different NFC stickers placed on a panel. The idea is to have ~20 small antennas, select one at a time, and write to the sticker sitting above that antenna.
Questions:
Can I do this with X-NUCLEO-NFC12A1 + STM32 by multiplexing the RF path (switches/decoder → select 1-of-20 antennas)?
Any recommended switch/multiplexer parts or reference designs for 13.56 MHz?
What are the practical limits on antenna count and cable/trace length when switching like this?
Do I need individual tuning (matching caps) per antenna position?
Is there a better Nucleo shield for this use-case (e.g., higher RF drive) or is NFC12A1 enough?
Goal: operator chooses pad 1…20, we write an NDEF, verify, then move to the next pad.
Kindly advise—example schematics/app notes or code pointers would be great.
Rgds,
Rp
#stm32 #nfc #x-nucleo-nfc12a1 #antenna #multiplexing #ndef
