Category Archives: RFID

RFID

Technology Companies Create RAIN to Promote EPC UHF RFID Adoption

Four technology companies have teamed up to form RAIN RFID, an organization whose mission is to promote the adoption of EPC ultrahigh-frequency (UHF) RFID. The organization—founded by Impinj, Intel, Google and Smartrac, and hosted by automatic-identification trade association AIM—is focused on driving UHF RFID deployment through education, testing and support of technology developers and end users. The group announced its launch today at RFID Journal LIVE! 2014, taking place this week in Orlando, Fla.

The word RAIN—an acronym derived from RAdio frequency IdentificatioN—is intended as a nod to the link between UHF RFID and the cloud, where RFID-based data can be stored, managed and shared via the Internet. With a six-member board consisting of an AIM liaison, four elected directors and a president, the alliance was conceived following standards organization GS1‘s ratification of the UHF Gen2v2 standard in November 2013 (see GS1 Ratifies EPC Gen2v2, Adds Security Features, More Memory). That ratification, says Chris Diorio, RAIN’s chairman of the board and Impinj’s chief strategy and technology officer, signifies further maturity in the UHF market, at the same time that item-level UHF RFID tagging for the retail sector has grown exponentially.

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RFID

RFID Standards

  • 125 Khz (low-frequency) tags are write-once/read-many, and usually only contain a small (permanent) unique identification number.
  • 13.56 Mhz (high-frequency) tags are usually read/write, they can typically store about 1 to 2 kilbytes of data in addition to their preset (permanent) unique ID number.
  • 860-960 Mhz (ultra-high-frequency) tags are typically read/write and can have much larger information storage capacity (I think that 64 KB is the highest currently available for passive tags) in addition to their preset (permanent) unique ID number.

Most read/write tags can be locked to prevent further writing to specific data-blocks in the tag’s internal memory, while leaving other blocks unlocked. Different tag manufacturers make their tags differently, though.

Depending on your intended application, you might have to program your own microcontroller to interface with an embedded RFID read/write module using a manufacturer-specific protocol.

 

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