Abstract: A communication apparatus includes a generation unit configured to generate data in a first state, a communication unit configured to wirelessly communicate with an external apparatus at a first time interval, a transmission unit configured to transmit data to the external apparatus in response to a transition to a second state in which power consumption is smaller than power consumption in the first state. When the control unit controls the transmission unit not to transmit the data in the second state, the communication unit wirelessly communicates, in the second state, at a second time interval, the second time interval being larger than the first time interval. When the control unit controls the transmission unit to transmit the data in the second state, the communication unit wirelessly communicates, in the second state, at a third time interval, the third time interval being smaller than the second time interval.

Abstract: A camera generates a random number, displays a Quick Response (QR) code representing the generated random number, and transmits the generated random number to a web server. A smart phone captures an image of the QR code displayed on the camera, acquires the random number based on the captured QR code, and transmits the acquired random number to the web server. The web server registers the camera based on a match between the random number transmitted from the camera and the random number transmitted from the smart phone.

Abstract: An electronic apparatus comprises a communication unit that wirelessly communicates with an external apparatus present within a predetermined range, and a control unit that controls the electronic apparatus. Upon receiving a connection request from the external apparatus in response to an advertisement signal transmitted via the communication unit when the control unit is in a sleep state in which its power consumption is reduced, the control unit returns from the sleep state and determines whether or not the external apparatus, which has transmitted the connection request, has been connected to the electronic apparatus in the past, and if determining that the external apparatus, which has transmitted the connection request, has not been connected to the electronic apparatus in the past, the control unit transits to the sleep state.

Abstract: An electronic apparatus comprises a communication unit that wirelessly communicates with an external apparatus present within a predetermined range, and a control unit that controls the electronic apparatus. Upon receiving a connection request from the external apparatus in response to an advertisement signal transmitted via the communication unit when the control unit is in a sleep state in which its power consumption is reduced, the control unit returns from the sleep state and determines whether or not the external apparatus, which has transmitted the connection request, has been connected to the electronic apparatus in the past, and if determining that the external apparatus, which has transmitted the connection request, has not been connected to the electronic apparatus in the past, the control unit transits to the sleep state.

Abstract: A communication apparatus includes a first wireless communication unit, a second wireless communication unit, and a control unit, wherein the control unit performs control to execute processing for sharing a communication parameter with an external apparatus via the second wireless communication unit before a request for connecting via the first wireless communication unit becomes able to be communicated with the external apparatus via the second wireless communication unit, where the communication parameter is used in connecting to the external apparatus via the first wireless communication unit.

Abstract: A communication apparatus includes a first wireless communication unit, a second wireless communication unit, and a control unit, wherein the control unit performs control to execute processing for sharing a communication parameter with an external apparatus via the second wireless communication unit before a request for connecting via the first wireless communication unit becomes able to be communicated with the external apparatus via the second wireless communication unit, where the communication parameter is used in connecting to the external apparatus via the first wireless communication unit.

Abstract: A communication device in a system including a first device and a second device includes an input unit configured to receive a predetermined control command, and a shift unit configured to cause the wireless communication unit to shift to any of operation modes including a reception mode for receiving a signal from another device and a transmission mode for not receiving a signal from another device. In a case where the input unit receives a control command, the shift unit causes the wireless communication unit to shift to the transmission mode without shifting to the reception mode.

Abstract: The invention reduces the possibility that a state contrary to user volition will arise in a system that permits multiple masters. To accomplish this, a communication device includes a setting unit configured to set the communication device to be a master or to be a slave, a decision unit configured to decide whether to permit a plurality of masters to exist within the image sensing network, and a notifying unit configured to transmit a notification to change another master within the image sensing network to a slave. The notifying unit transmits the notification, if a plurality of masters have not been permitted to exist within the image sensing network by the decision unit and the communication device has been changed from a slave to a master by the setting unit.