Patent ID: 9723640
Date: 2017-08-01
CPC Classifications: G06F,H04L,H04W,Y04S

Claim:
1. A terminal device capable of communicating with a master wireless device, the terminal device comprising a power generator and a control circuit, wherein the power generator is configured to generate electric power by energy-harvesting utilizing energy generated by movement of the terminal device and supply a power-supply voltage based on the electric power to the control circuit, wherein the control circuit has operating modes, including a normal operating mode for outputting startup information relating to startup of the terminal device, and a registration mode for outputting registration information relating to registration of the terminal device with the master wireless device, wherein the control circuit shifts one of the operating modes to the registration mode based on timing of a plurality of startups of the terminal device, wherein the terminal device stores information of the timing of the plurality of startups of the terminal device in memory as an output pattern, and the terminal device transmits, during the registration mode, an identifier of the terminal device and one of an encryption key or a registration request signal for requesting the master wireless device to transmit an encryption key, wherein the terminal device further includes a determinator circuit that determines whether or not a predetermined time elapses from a preceding startup to a next startup of the terminal device, wherein when a waveform of the power-supply voltage rises, the control circuit obtains a time interval from a preceding startup of the terminal device to a next startup of the terminal device and stores a digit composing the output pattern, and wherein the control circuit compares a predetermined output timing pattern with the output pattern obtained from the plurality of startup timings stored in memory, shifts the normal operating mode to the registration mode when the output pattern coincides with the predetermined output timing pattern and otherwise keeps the operation mode in the normal operating mode.