Wireless communication device for transmitting connection requests at different frequencies

1. A wireless communication device for a human-powered vehicle, comprising:

a wireless communicator configured to wirelessly transmit a connection demand signal to establish a wireless connection between the wireless communicator and an additional wireless communicator; and

a controller configured to control the wireless communicator to wirelessly transmit the connection demand signal at first frequency for a first period, the controller being configured to control the wireless communicator to wirelessly transmit the connection demand signal at second frequency which is different from the first frequency after a passage of the first period, wherein

the controller is configured to control the wireless communicator to establish the wireless connection with the additional wireless communicator if a connection signal from the additional wireless communicator is detected in response to the connection demand signal.

2. The wireless communication device according to claim 1 , wherein

the second frequency is lower than the first frequency.

3. The wireless communication device according to claim 1 , wherein

the controller is configured to control the wireless communicator to wirelessly transmit the connection demand signal at the second frequency for a second period after the passage of the first period, the second period is different from the first period.

4. The wireless communication device according to claim 3 , wherein

the second period is longer than the first period.

5. The wireless communication device according to claim 3 , wherein

the controller is configured to control the wireless communicator to stop transmitting the connection demand signal after a passage of the second period.

6. The wireless communication device according to claim 1 , wherein

the controller is configured to control the wireless communicator to wirelessly transmit the connection demand signal at first intervals for the first period,

the controller is configured to control the wireless communicator to wirelessly transmit the connection demand signal at second intervals which is different from the first intervals after a passage of the first period.

7. The wireless communication device according to claim 1 , wherein

the wireless communicator is configured to communicate with the additional wireless communicator using a first communication protocol and a second communication protocol, the second communication protocol being different from the first communication protocol.

8. The wireless communication device according to claim 7 , wherein

the wireless communicator is configured to communicate with the additional wireless communicator using each of the first communication protocol and the second communication protocol in a first communication mode.

9. The wireless communication device according to claim 1 , wherein

the controller is configured to control the wireless communicator to wirelessly transmit the connection demand signal at the first frequency for the first period beginning when the wireless communication device is turned on, and

the controller is configured to control the wireless communicator to wirelessly transmit the connection demand signal at the second frequency immediately following the end of the first period.

10. An operating system for a human-powered vehicle, comprising:

a wireless communication device comprising:

a first wireless communicator configured to wirelessly transmit a connection demand signal to establish a wireless connection between the first wireless communicator and an additional wireless communicator; and

a controller configured to control the first wireless communicator to wirelessly transmit the connection demand signal at first frequency for a first period, the controller being configured to control the first wireless communicator to wirelessly transmit the connection demand signal at second frequency which is different from the first frequency after a passage of the first period; and

a pedal sensing device comprising:

a pedaling sensor configured to sense a state of pedaling of the human-powered vehicle; and

a second wireless communicator configured to wirelessly communicate with the additional wireless communicator.

11. A wireless communication device for a human-powered vehicle, comprising:

a wireless communicator configured to wirelessly transmit a connection demand signal to establish a wireless connection between the wireless communicator and an additional wireless communicator; and

a controller configured to control the wireless communicator to wirelessly transmit the connection demand signal at first frequency for a first period, the controller being configured to control the wireless communicator to wirelessly transmit the connection demand signal at second frequency which is different from the first frequency after a passage of the first period, wherein

the wireless communicator is configured to communicate with the additional wireless communicator using a first communication protocol and a second communication protocol, the second communication protocol being different from the first communication protocol.

12. The wireless communication device according to claim 11 , wherein

the wireless communicator is configured to communicate with the additional wireless communicator using each of the first communication protocol and the second communication protocol in a first communication mode.