NFC (Near Field Communication) is a great technology for smartphones and similar devices. It enables radio communication when they're touched or brought close. It enhances RFID systems with two - way endpoint communication. Compared to Bluetooth, another short - range tech, NFC is slower but uses much less power and needs no pairing. This NFC shield, based on NXP's PN532, operates at 13.56MHz ISM band. With a built - in NFC antenna, it has a communication range of about 2cm. You can read and write 13.56MHz tags and use P2P communication with other devices or smartphones. Key features include a 5cm max effective range, an SPI interface for Arduino/Crowduino, support for P2P communication, and ISO14443 Type A and Type B protocols. The package includes one NFC Shield PCBA and one 13.56MHz Tag (Clear Diamond). Check the manual and wiki for more details.
Using this NFC shield is quite easy. First, connect it to your Arduino or Crowduino via the SPI interface. Then, if you want to read or write a 13.56MHz tag, just bring the tag close to the shield within the 2cm communication range. For P2P communication, pair it with another compatible device or your smartphone. When using, make sure the devices are within the 5cm effective range. Keep the shield away from strong magnetic fields as it may affect its performance. For maintenance, gently clean the shield with a dry cloth. Don't expose it to extreme temperatures or moisture to ensure its long - term functionality.
