PN532 NFC / RFID Module (I2C/SPI)
by NXP / Elechouse clone
SKU: PSA-CMP-PN532
No reviews yetTypical India street price
₹250–₹500
Read/write NFC tags and peer-to-peer — beyond RC522 MIFARE-only kits.
Interface: I2C / SPI / HSU
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Concept
PN532 is a versatile 13.56 MHz frontend that speaks NFC Forum protocols, not only classic MIFARE UID reads.
A little theory
Supports ISO14443A/B and FeliCa subsets depending on library. Mode switches via onboard jumpers (I2C/SPI/HSU). In the classroom, treat PN532 NFC / RFID Module (I2C/SPI) as a intermediate part using I2C / SPI / HSU. Typical India street price is about ₹250–₹500. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Set jumpers to I2C, Adafruit_PN532 begin(), readPassiveTargetID().
Classroom & project use
- Attendance NFC
- Smart posters
- Access control
Buying in India
Precautions
- Confirm 3.3 vs 5 V module
- Antenna keep-out from ground planes
Specifications
| Frequency | 13.56 MHz |
| Chip | PN532 |
| Modes | I2C/SPI/HSU |
| Category | Sensors |
| Difficulty | Intermediate |
| Voltage | 3.3–5V |
| Interface | I2C / SPI / HSU |
Pinout
Depends on mode — I2C: SDA/SCL; SPI: MOSI/MISO/SCK/SS
