This is a blank 13.56MHz RFID/NFC keychain fob. It's not only great for keys but also an easy way to tag items. Inside, there's a small RFID chip and an antenna. It gets power passively from the reader/writer when placed a couple of inches away. Almost any 13.56MHz RFID/NFC reader can read it, but make sure it supports ISO/IEC 14443 Type A cards as there are other encoding standards. These fobs work well with our PN532 NFC/RFID breakout board and Adafruit NFC/RFID Shield for Arduino. The chips can store up to 1 KB of data in writable EEPROM divided into banks and can handle over 100,000 re - writes. You can use our specified boards to read and write data to the tag's EEPROM. Each chip has a permanent 4 - byte ID for identification. Note that the ISO/IEC 14443 Type A chipset used in these fobs is no longer supported by the NFC forum since around 2014, so newer phones may not work with them.
Using this 13.56MHz RFID/NFC keychain fob is easy. First, if you want to read or write data, use our PN532 NFC/RFID breakout board or Adafruit NFC/RFID Shield for Arduino. Just place the fob a couple of inches away from the reader/writer and it'll get powered up. When writing data, remember it can store up to 1 KB in the EEPROM and handle over 100,000 re - writes. The 4 - byte ID on the chip is permanent and can't be changed, which is useful for telling different fobs apart. One thing to keep in mind is that since the NFC forum stopped supporting the ISO/IEC 14443 Type A chipset around 2014, newer phones and tablets might not work with this fob. For maintenance, keep it away from extreme heat, moisture, and strong magnetic fields. These conditions could damage the internal chip and antenna, affecting its performance.
