RFID reader
The evolution of smart cards is the Radio-Frequency IDentification (RFID) devices that can be used to identify people or objects in a contactless form, starting from few centimeters until several meters. The RFID readers and the corresponding tags (or transponders) are high-technology radio devices that can exchange data with each other in order to accomplish identification tasks.
Tip
You can get more information regarding the RFID world by taking a look at https://en.wikipedia.org/wiki/Radio-frequency_identification .
There are several classes of RFID readers according to the frequencies in which they work. Some of them are:
- RFID low frequency (LF) readers can be used where the identification tasks need no wires, but where the distance between the object to identify and the reader is no more than few centimeters. These devices are usually very simple as the ones we presented in Chapter 7, Serial Ports and TTY Devices - TTY. The reader is connected with the host by a...
