Research of technical features of the Arduino based RFID system

In the article the features of creation of the system of radio frequency identification on the basis of Arduino interface software are considered. This model of the system has its own technical features of the configuration, characterized by the implementation of the algorithm of programming the components of the system, initialization and authentication of the object on the basis of special access tags - a card and a key. The constructed access model can be used to identify objects in special security systems. It is determined that the created module in various operating modes has its technical limitations, which are determined by the limited radius of action, the form of the reader and the design of the radio frequency tag. Most transponders consist of two parts. The first is an integrated circuit (IC) for storing and processing information, modulating and demodulating a radio frequency (RF) signal and some other functions. The second is an antenna for receiving and transmitting a signal. The reader has a transmitting device-it sends a signal to the label and receives the corresponding signal from the label. The microprocessor (passive label) that sends the signal is powered by the induction current from the coil or an antenna in which the current is produced when the label passes through the electromagnetic field. Labels may have a more complicated implementation with a microprocessor that checks and decodes the data, and not simply matches the identifier, as well as the memory that stores the data for the next transmission, if necessary. The reader is engaged in the generation and propagation of electromagnetic waves into the surrounding space. This signal is received by an RFID tag, which creates a feedback signal picked up by the reader’s antenna, then the received information is decoded and processed by the electronic unit. An object equipped with an RFID tag is identified using a unique digital code that is stored in the memory of the electronic tag. For example, you can get individual user data or the identification number of a product in a matter of seconds. It was found that the condition of functioning of the developed system of radio frequency identification is the absence at the given operating frequency and near the scanner of electromagnetic interference of different nature of origin.