13.56MHz RFID/NFC Charm [1KB]

This is a blank 13.56MHz RFID/NFC tag embedded in a cute phone charm. It's often used for train or bus passes and in other systems that need proximity cards. The tag has a small RFID chip and an antenna, and it gets power from the reader/writer when placed a couple of inches away. Most 13.56MHz RFID/NFC readers can read these tags, but make sure your reader supports ISO/IEC 14443 Type A cards as there are other encoding standards. It works great with our PN532 NFC/RFID breakout board and Adafruit NFC/RFID Shield for Arduino. These chips can store up to 1KB of data in writable EEPROM divided into banks and can handle over 100,000 re - writes. You can use our recommended boards to read and write data to the tag's EEPROM. Each chip has a permanent 4 - byte ID for identification. Note that it uses a ISO/IEC 14443 Type A chipset which is no longer supported by the NFC forum since around 2014, so newer phones may not support it, which only matters if you want to use it with a phone or tablet.

Using this 13.56MHz RFID/NFC phone charm tag 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 tag a couple of inches away from the reader/writer and it will get powered up. When writing data, keep in mind that it can store up to 1KB in its EEPROM and can handle over 100,000 re - writes. Each tag has a unique 4 - byte ID that can't be changed, which you can use to tell tags apart. Now, for the important stuff. Make sure your reader supports ISO/IEC 14443 Type A cards. Also, since the NFC forum stopped supporting this chipset around 2014, newer phones might not work with the tag. When it comes to maintenance, just keep it away from extreme heat, moisture, and strong magnetic fields to keep it in good condition.