A method for controlling image-forming devices includes acquiring currently-available wireless networks, including detecting the currently-available wireless networks and acquiring broadcast information transmitted by each wireless access point by a wireless communication module in an electronic terminal; searching image-forming devices through the currently-available wireless networks and establishing a list of the image-forming devices; according to the list of the image-forming devices, selecting a target image-forming device; and connecting to a wireless network corresponding to the target image-forming device and establishing a communication with the target image-forming device, thereby controlling the target image-forming device to execute an image-forming task.

A communication apparatus may perform: communicating a wireless setting value with a printer via a first wireless communication interface, establishing the wireless connection with the printer via a second wireless communication interface using the wireless setting value; sending first image data representing a first image of a print target to the printer via the second wireless communication interface using the wireless connection; determining, after the first image data is sent to the printer, whether an apparatus-side disconnection condition is satisfied; disconnecting the wireless connection when it is determined that the apparatus-side disconnection condition is satisfied; and sending, when it is determined that the apparatus-side disconnection condition is not satisfied, second image data representing a second image of a print target to the printer via the second wireless communication interface using the wireless connection.

A first communication apparatus may repeat a broadcast transmission of a trigger signal via a second interface, which is a signal to be used by a second communication apparatus as a trigger for sending a wireless connection request to the first communication apparatus. The wireless connection request may be for forming a first wireless network to which both the first communication apparatus and the second communication apparatus belong. The first wireless network may be a network for performing a wireless communication via a first interface. The first communication apparatus may receive the wireless connection request via the first interface from the second communication apparatus which has received the trigger signal, and establish a first wireless connection via the first interface with the second communication apparatus so as to form the first wireless network.

A server includes memory, a connection establisher, a first transmission request receiver, a first determiner, a first screen data transmitter, a second screen data transmitter, and a first disconnector. The connection establisher establishes continuous connection with a communication device. The first transmission request receiver receives a first transmission request t for displaying a setting screen corresponding to a first type of service. In response to the first transmission request being received from the external device, the first determiner determine whether a second type of service is currently provided. The first screen data transmitter transmits first screen data for displaying a first setting screen to the external device in response to the first determiner determining that the second type of service is not currently provided. The first disconnector disconnects the continuous connection in response to selection of a disconnection button included in the first setting screen displayed on the external device.

An information processing apparatus controls a printing process performed by an image forming apparatus. The information processing apparatus includes a communication controller configured to perform communication with the image forming apparatus; a display controller configured to cause a display to display an operation screen for accepting a setting or an operation relating to the printing process; a data transmitter configured to transmit predetermined data by the communication to the image forming apparatus, while the operation screen is being displayed; and a renderer configured to generate print data to be transmitted to the image forming apparatus by the communication, according to the setting or the operation accepted at the operation screen.

A first communication apparatus may repeat a broadcast transmission of a trigger signal via a second interface, which is a signal to be used by a second communication apparatus as a trigger for sending a wireless connection request to the first communication apparatus. The wireless connection request may be for forming a first wireless network to which both the first communication apparatus and the second communication apparatus belong. The first wireless network may be a network for performing a wireless communication via a first interface. The first communication apparatus may receive the wireless connection request via the first interface from the second communication apparatus which has received the trigger signal, and establish a first wireless connection via the first interface with the second communication apparatus so as to form the first wireless network.

An information processing apparatus operating as a virtual network computing (VNC) server includes a memory and at least one processor in communication with the memory, wherein the at least one processor of the information processing apparatus is configured to perform, in a case where a request for a VNC connection is received from a second VNC client in a state in which the information processing apparatus is connected with a first VNC client using VNC, first connection control to maintain the connection with the first VNC client and not to establish a VNC connection with the second VNC client, or second connection control to cut off the connection with the first VNC client and to establish the VNC connection with the second VNC client.

A method and a device for controlling image-forming devices, and an electronic terminal using the method are provided in the present disclosure. The method includes acquiring currently-available wireless networks; when a wireless network is provided by an image-forming device, acquiring a first network identifier of the wireless network; when a wireless network is not provided by the image-forming device, connecting to the wireless network and acquiring a first device identifier of the image-forming device connected to the wireless network; adding the first network identifier and the first device identifier acquired to the list of the image-forming devices; according to the list of the image-forming devices, selecting a target image-forming device; and connecting to a wireless network corresponding to the target image-forming device and establishing a communication with the target image-forming device, thereby controlling the target image-forming device to execute an image-forming task.

A server includes memory, a connection establisher, a first transmission request receiver, a first determiner, a first screen data transmitter, a second screen data transmitter, and a first disconnector. The connection establisher establishes continuous connection with a communication device. The first transmission request receiver receives a first transmission request t for displaying a setting screen corresponding to a first type of service. In response to the first transmission request being received from the external device, the first determiner determine whether a second type of service is currently provided. The first screen data transmitter transmits first screen data for displaying a first setting screen to the external device in response to the first determiner determining that the second type of service is not currently provided. The first disconnector disconnects the continuous connection in response to selection of a disconnection button included in the first setting screen displayed on the external device.

A communication apparatus may perform: communicating a wireless setting value with a printer via a first wireless communication interface, establishing the wireless connection with the printer via a second wireless communication interface using the wireless setting value; sending first image data representing a first image of a print target to the printer via the second wireless communication interface using the wireless connection; determining, after the first image data is sent to the printer, whether an apparatus-side disconnection condition is satisfied; disconnecting the wireless connection when it is determined that the apparatus-side disconnection condition is satisfied; and sending, when it is determined that the apparatus-side disconnection condition is not satisfied, second image data representing a second image of a print target to the printer via the second wireless communication interface using the wireless connection.