I'm trying to test NFC on a NRF52840 Development Kit (PCA10056 - .Version 3.0.3), using NRF SDK 2.6.0.
I'm testing using the RECORD_TEXT sample project (C:\ncs\v2.6.0\nrf\samples\nfc\record_text).
My DK was delivered from Mouser without a NFC antenna, so I'm testing a few antenna samples from a potential antenna vendor, which I've conneced to P0.09/P0.10.
RECORD_TEXT doesn't see them.
I've done some basic checking,
1. there are resistors on the DK that connect the NFC ports to P0.09 and P0.10.
They seem to be correct - R44 and R46 are 0 OHM resistors, R43 and R45 are open.
2. UICR 0x20C (NFCPINS) is 0XFFFF
3. The Android app I'm using sees both Type 2 and Type 4 tags.
I can't find any specs on the NFC Antenna - so I can't ask the vendor if their antennas match the expected specification for the NFC drivers on the DK.
Since my DK was delivered from Mouser without a NFC antenna, I can't test the NCF function in a native Nordic environment.
Can you:
1. point me to a source for the Nordic NFC antenna.
2. point me to the Specs for that antenna, so I can verify them with the vendor.
Thank you