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■ What are RFID and NFC?
RFID
RFID technologies use radio waves to automatically identify individual
objects. The most common method of identifying objects using RFID is to
store a serial number that identifies the object on an RFID tag, and attach
the tag to the object.
objects. The most common method of identifying objects using RFID is to
store a serial number that identifies the object on an RFID tag, and attach
the tag to the object.
The RFID tag is able to transmit the information it contains to an RFID
reader device. The RFID reader is a short-range device (reading range
0-5 cm) and it converts the radio waves returned from the RFID tag into a
format that can then be passed on to an application in the phone.
reader device. The RFID reader is a short-range device (reading range
0-5 cm) and it converts the radio waves returned from the RFID tag into a
format that can then be passed on to an application in the phone.
To transmit data from the RFID tag to the RFID reader, Nokia NFC shell
uses the radio frequency 13.56 MHz, which is the most widely used
globally available frequency for RFID.
uses the radio frequency 13.56 MHz, which is the most widely used
globally available frequency for RFID.
NFC
NFC (Near Field Communication) is a short-range radio frequency
technology that evolved from a combination of contactless radio
frequency identification (RFID) and interconnection technologies. By
emitting a short-range radio signal, the NFC device supplies power to an
otherwise inactive tag, allowing the device to read the tag or write data
to the tag's memory. Operating over a distance of only very few
centimetres, it allows users to read small amounts of data from tags, as
well as to communicate with other devices, by a simple touch.
technology that evolved from a combination of contactless radio
frequency identification (RFID) and interconnection technologies. By
emitting a short-range radio signal, the NFC device supplies power to an
otherwise inactive tag, allowing the device to read the tag or write data
to the tag's memory. Operating over a distance of only very few
centimetres, it allows users to read small amounts of data from tags, as
well as to communicate with other devices, by a simple touch.
When touching a tag, the NFC device reads the data stored on the tag,
and initiates the appropriate action after the user's confirmation. For
example, it will open a web page, call a favourite number, or send an SMS.
and initiates the appropriate action after the user's confirmation. For
example, it will open a web page, call a favourite number, or send an SMS.
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