PN7161 NFC RFID Module (I2C)
The PN7161 NFC RFID Module (I2C) is the standard I2C member of the PN7161 family. Compared with PN7160, it adds support for Apple’s Enhanced Contactless Polling (ECP) while keeping the same I2C integration style, dimensions, and Linux/Android driver model.
If you need Apple Wallet, Apple VAS, or Apple ECP compatibility on an I2C-based design, this is the correct PN7161 module. If your project uses SPI instead of I2C, use the PN7161 MINI V1 — SPI version.
Why Choose PN7161 I2C
- Standard I2C interface for controllers built around SDA/SCL
- Apple ECP support for Apple Wallet and Apple VAS related reader projects
- Same general footprint and software model as PN7160
- Suitable for Linux, Android, Raspberry Pi, ESP32, and embedded development
Key Specifications
| Chip | NXP PN7161 |
|---|---|
| Interface | I2C |
| Protocol Stack | NCI 2.0 |
| Apple ECP | Supported |
| Supply Voltage | 3.3V to 5V |
| Dimensions | 42.83mm × 40.53mm |
Supported NFC Functions
- Reader / Writer
- Peer-to-Peer
- Card Emulation
- ISO 14443A / 14443B
- ISO 15693
- MIFARE and FeliCa
Typical Applications
- Apple Wallet compatible NFC reader projects
- Access control and payment terminals
- Embedded Linux and Android NFC devices
- I2C-based controller boards and gateways
PN7161 I2C to ESP32 Typical Wiring
| PN7161 I2C | ESP32 | Notes |
|---|---|---|
| SDA | GPIO21 | I2C data |
| SCL | GPIO22 | I2C clock |
| IRQ | GPIO14 | Interrupt |
| VEN | GPIO13 | Enable / reset |
| VDD | 3.3V | Logic supply |
| VANT | 5V | Antenna supply |
| GND | GND | Common ground |
| DWL | GPIO19 | Optional control pin |
Documentation and Test Guides
Product details are kept on this page. Wiring, bring-up, software setup, and test guides are maintained separately in the documentation hub.
Package and Support
- 1 × PN7161 NFC RFID Module (I2C)
- Technical documents and reference links available in the documentation hub, including ELECHOUSE_PN7150_PN7160 (GitHub) for Arduino and ESP32 development
Wiring Reminder
When wiring the module to ESP32, Raspberry Pi, or similar hosts, remember the power rails in addition to SDA/SCL/IRQ/VEN: connect VDD to 3.3V, VANT to 5V, and GND to GND.
