NFC Tandem offers best of both worlds:
| An NFC reader and a passive connected tag sharing one antenna. A user can interact with the device when it is powered off (through the NTAG I²C plus); when the device is powered, it can interact with cards, P2P devices or other connected tags. |  |
NFC Tandem Uses Cases and Applications:
- One-touch pairing
- WiFi with phone, or card
- Bluetooth with phone, headset, speaker
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- IoT network node commissioning
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- User identification with badge or phone
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- Authentication and configuration of consumable and accessory
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- Zero-power parametrization
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- Zero-power firmware update
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- Zero-power diagnosis and maintenance
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NFC Tandem Demo:
NFC Tandem concept is demonstrated using NFC Tandem reference board:

The demo can run on either:
Video of the demo:
NFC Tandem References:
PN7150 High performance NFC controller, supporting all NFC Forum modes, with integrated firmware and NCI interface | NTAG I²C plus NFC Forum Type 2 Tag with I²C interface |
NFC Tandem Documents:
User Manual and reference schematics are attached to this document