Abstract:
A mobile device includes: a communications circuit which performs wireless communication; a receiver which receives input of a destination from a user; an output which outputs guidance information for guiding the user from a current location to the destination; and a controller which causes the output to output notification information for notifying presence of a transmitting device which emits light for visible light communications, if the communications circuit receives a wireless signal from a transmitting device by the wireless communication.
Abstract:
A modulation device includes a modulator circuit that causes a light source to perform light communication, storage storing an internal ID, and a control circuit that determines whether an external ID is input into the modulation device. When the control circuit determines that the external ID is input into the modulation device, the control circuit causes the input external ID to be input, as a modulation signal, into the modulator circuit. When the control circuit determines that the external ID is not input into the modulation device, the control circuit causes the internal ID stored in the storage to be input, as a modulation signal, into the modulator circuit.
Abstract:
A modulation device includes: a modulation ID signal generator that generates a first ID signal including first identification information; a reception terminal capable of receiving a second ID signal including second identification information; a transmission terminal capable of transmitting the first ID signal and the second ID signal out of the modulation device; a detector that detects a received state in which the second ID signal is received by the reception terminal and an unreceived state in which the second ID signal is not received by the reception terminal; and a switch circuit that outputs the first ID signal to the transmission terminal when the detector detects the unreceived state and outputs the second ID signal to the transmission terminal when the detector detects the received state.