A control unit in a communications device, upon receipt of information from a first lighting device, transmits the information from the first lighting device to a second lighting device and enters a single protocol state in which wireless communication is performed exclusively via a second communications protocol, until the communications device receives a response to the transmission. Upon receipt of information from the second lighting device, the control unit transmits the information from the second lighting device to the first lighting device and enters a single protocol state in which wireless communication is performed exclusively via a first communications protocol, until the communications device receives a response to the transmission. Upon receipt of either of the responses by the communications device, the control unit enters a multiprotocol state in which wireless communication is possible via the first and second communications protocols.