Information transmission device, information transmission method, non-transitory computer readable recording medium and portable terminal

An information transmission method comprising:

• generating step that generates pairing information being divided into multiple pieces according to a predetermined data structure and for starting bidirectional communication with a portable terminal;
• transmission step that transmits the pairing information;
• reception step that receives a pairing request signal transmitted by the portable terminal that receives the pairing information;
• and
• pairing step that performs a pairing operation with the portable terminal in response to the pairing request signal.

A non-transitory computer readable recording medium storing a program that causes a computer to function as:

• a generator that generates pairing information being divided into multiple pieces according to a predetermined data structure and for starting bidirectional communication with a portable terminal;
• a transmitter that transmits the pairing information;
• a receiver that receives a pairing request signal transmitted by the portable terminal that receives the pairing information;
• and
• a pairer that performs a pairing operation with the portable terminal in response to the pairing request signal.

A portable terminal that performs bidirectional communication with an information transmission device comprising:

• a processor;
• and
• a radio communicator that performs bidirectional communication between the information transmission device and the portable terminal in response to an instruction from the processor,
• wherein the processor receives pairing information transmitted by the information transmission device;
• the processor transmits a pairing request signal to the information transmission device after receiving the pairing information;
• and
• the pairing information is information being divided multiple pieces according to a predetermined data structure and for starting bidirectional communication with the information transmission device.