JP7301941B2 - COMMUNICATION TERMINAL, COMMUNICATION TERMINAL CONTROL METHOD AND PROGRAM - Google Patents

Description

The present invention relates to a communication terminal that cooperates with an external device via short-range wireless communication.

An image processing apparatus provides users with various functions such as a print function, a copy function, and a file transmission function. When a user uses functions provided by an image processing apparatus, the user needs to log in to the image processing apparatus. As a method for allowing a user to log in to an image forming apparatus, it is known that when a communication terminal such as a mobile terminal approaches the image processing apparatus, a login request is sent to the image forming apparatus and the user is logged in to the image processing apparatus. (For example, Patent Document 1)

JP 2016-66217 A

In the series of login processes using a communication terminal disclosed in Patent Document 1, detailed control in the login process, such as guidance and error notification when the user logs in, is not disclosed. do not have. As described above, there is a concern that the operation is difficult for the user to understand in the log-in process using the conventional communication terminal. For example, if the short-range wireless communication settings required to log in to the image processing apparatus are not set correctly in the communication terminal, the control sequence is not taken into account, and the user is asked why the login failed. Unexpected cases can arise.

The present invention has been made in view of at least one of the above problems. SUMMARY OF THE INVENTION It is an object of the present invention to provide a mechanism for enhancing user convenience when logging in from a communication terminal to a surrounding external device.

Another object of the present invention is to prevent useless user operations by notifying the user before requesting login if the settings used for login processing are not properly set. The purpose is to provide a mechanism.

In order to achieve at least one of the above objects, a communication terminal according to the present invention uses a Bluetooth communication interface, a display section for displaying information, and detects a printer that satisfies a predetermined condition using the Bluetooth communication interface. means, and means for displaying a notification of sensitivity adjustment on the display unit after a predetermined time has elapsed since the detection process was started .

Advantageous Effects of Invention According to the present invention, it is possible to provide a mechanism for enhancing user convenience when performing communication for cooperation from a communication terminal to a surrounding external device.

In addition, as one aspect of the present invention, by notifying the user when the setting used for communication for cooperation is not properly made, unnecessary user operations are suppressed. We can provide a mechanism.

It is a figure which shows the outline|summary of a system. 2 is a diagram showing an example of a hardware configuration of communication terminal 102. FIG. 3 is a diagram showing an example of a software configuration of communication terminal 102. FIG. 3 is a diagram showing an example of the hardware configuration of the MFP 101; FIG. 4A and 4B are diagrams for explaining an example of a screen displayed on the operation unit of the communication terminal 102. FIG. 4A and 4B are diagrams for explaining an example of a screen displayed on the operation unit of the communication terminal 102. FIG. 4A and 4B are diagrams for explaining an example of a screen displayed on the operation unit of the communication terminal 102. FIG. 4 is a flow chart showing control of the communication terminal 102. FIG. 4 is a flow chart showing control of the communication terminal 102. FIG. 4 is a flow chart showing control of the communication terminal 102. FIG. 4 is a flowchart showing control of the MFP 101; FIG. 2 is a diagram for explaining data communication using BLE; FIG. 3A and 3B are diagrams for explaining an example of a screen displayed on the operation unit of the MFP 101; FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to the claims, and not all combinations of features described in the embodiments are essential to the solution of the invention.

<First embodiment>
First, the configuration of a communication system according to the present invention will be described with reference to FIG. The system according to this embodiment includes a communication terminal 102 , an MFP (Multi Function Peripheral) 102 and an AP (Access Point) 103 .

The communication terminal 102 is capable of wireless communication based on the IEEE802.11 standard (hereinafter referred to as the 802.11 standard). The communication terminal 102 can connect to the network provided by the AP 103 by the user inputting an SSID (Service Set Identifier) and a security key for connecting to the AP 103 into the communication terminal 102 .

The MFP 101 is a multi-function device having functions such as scanning, printing, and copying. When the SSID and security key for connecting to the AP 103 are set as wireless network settings of the MFP 101 , the communication terminal 102 and the MFP 101 can perform wireless communication via the AP 103 . The MFP 101 can receive print data from the communication terminal 102 via wireless communication and print the data.

In addition, from the viewpoint of security, the MFP 101 of this embodiment can perform user authentication management on the premise of user login. When the user has not logged in, the MFP for which user authentication management is set to ON displays a login screen on the operation unit and each function of the MFP 101 cannot be used. The MFP 101 determines whether or not to permit the user's login based on the user authentication information (also referred to as user credential) received from the user while the login screen is displayed. When the user's login is permitted, the MFP 101 displays a main screen (also called a main menu) on the operation unit of the MFP. A user can use each function provided in the MFP, such as a copy function and a transmission function, via a main screen displayed on the operation unit. Hereinafter, in the present embodiment, a state in which a user logs in and transitions to a state in which each function of the MFP can be used via the operation unit of the MFP is referred to as local login.

Further, the communication system of the present embodiment has a mobile cooperation function that provides functions to the user through cooperation between the communication terminal 102 and the MFP 101 . For example, a user who owns a communication terminal can execute a cooperative login function for logging a specific user into the MFP 101 by bringing the communication terminal 102 closer to the MFP 101 . The communication terminal 102 can perform data communication with the MFP 101 using short-range wireless communication. For example, the communication terminal 102 uses short-range wireless communication to perform data communication related to cooperative login.

Further, the MFP 101 and the communication terminal 102 can cooperate to scan a paper document, and execute a scan cooperation function of transmitting and saving. Also, a print release function of issuing a print instruction for print data retained in the MFP 101 can be executed from the operation unit of the communication terminal 102 .

Communication terminal 102 communicates with MFP 101 via AP 103 . For example, the communication terminal 102 can transmit/receive print data and scan data to/from the MFP 101 via the AP 103 .

The MFP 101 can also operate in access point mode. When operating in access point mode, the MFP 101 operates as a software access point. By connecting to the software AP provided by the MFP 101 , the communication terminal 102 can perform direct wireless communication with the MFP 101 without going through a relay device such as the AP 103 . By connecting to the MFP 101 using direct wireless communication with the MFP 101 , the communication terminal 102 can execute various cooperative functions without going through the AP 103 .

In addition, in this embodiment, a smart phone and a tablet PC (Personal Computer) are exemplified as an example of a communication terminal, but the communication terminal is not limited to this. Smartphones and tablet PCs are examples of communication terminals capable of performing short-range wireless communication, and may be other communication terminals such as wearable devices.

Also, in this embodiment, an MFP is exemplified as an example of an external device that cooperates with a communication terminal, but the present invention is not limited to this. For example, it can also be applied when performing user login to a single-function scanner, printer, 3D printer, or the like. Also, for example, it can be applied to user login to terminals of teleconference systems, car navigation devices, interactive whiteboards, and other home appliances.

<Communication terminal>
Next, the hardware configuration of communication terminal 102 will be described with reference to FIG. A CPU (Central Processing Unit) 111 included in the control unit 110 reads a control program stored in a ROM (Read Only Memory) 112 or a storage 114 to control the communication terminal 102 .

The control unit 110 includes a CPU 111, a ROM 112, a RAM (Random Access Memory) 113, a storage 114, an operation unit I/F 115, and a camera I/F 117 connected to a bus. The control unit 110 also has a wireless LAN I/F (interface) 122 and a Bluetooth (registered trademark) I/F 123 as communication interfaces for communicating with external devices. In this embodiment, the wireless LAN I/F 122 and the Bluetooth I/F 123 are described as separate hardware, but they are not limited to this. A combo chip that implements both wireless LAN wireless communication and Bluetooth short-range wireless communication with one piece of hardware may be mounted to implement wireless LAN wireless communication and Bluetooth short-range wireless communication.

A CPU 111 is a central processing unit (processor) that controls the overall operation of the control unit 110 . A RAM 113 is a volatile memory and is used as a temporary storage area for developing various control programs stored in the work area, ROM 112 and storage 114 .

A ROM 112 is a non-volatile memory and stores a boot program for the communication terminal 102 and the like. The storage 114 is a non-volatile flash memory with a large capacity compared to the RAM 113 . A control program for the communication terminal 102 is stored in the storage 114 . The storage 114 also stores an OS (Operating System) 300 and a cooperative application 310, which will be described later.

The CPU 111 executes a boot program stored in the ROM 112 when starting up the communication terminal. This boot program is for reading the program of the OS 300 stored in the storage 114 and developing it on the RAM 113 . After executing the boot program, the CPU 111 subsequently executes the OS 300 program developed on the RAM 113 to control the communication terminal 102 . The CPU 111 also stores data used for operations by the control program on the RAM 113 and reads and writes the data.

In communication terminal 102, one CPU 111 executes each process shown in a flowchart to be described later, but other modes may be used. For example, a plurality of CPUs or microprocessors (MPUs) may work together to execute each process shown in a flowchart to be described later. Also, part of the processing may be executed using a hardware circuit such as an ASIC (Application Specific Integrated Circuit).

An operation unit I/F 115 connects the operation unit 116 and the control unit 110 . The operation unit 116 includes a touch panel capable of detecting user's touch operation and a display panel for displaying various screens. An operation unit 116 functions as a display unit that displays information and a reception unit that receives user instructions. Various screens provided by the OS 300 and the cooperative application 310 are displayed on the operation unit 116 . Further, the user can input a desired operation instruction to the communication terminal 102 by performing a touch operation on the operation unit 116 using an object such as a finger. Further, the operation unit 116 is provided with hardware keys. The user can also input operation instructions to the communication terminal 102 by pressing hardware keys.

A camera I/F 117 connects the control unit 110 and the camera 118 . The camera 118 takes an image according to the user's imaging instruction. A photograph taken by camera 118 is stored in a predetermined area of storage 114 .

The wireless LAN I/F 122 provides wireless client functions for performing wireless communication conforming to the 802.11 standard. Also, the wireless LAN I/F 122 connects to an external AP and performs wireless communication conforming to the 802.11 standard. The external AP may be MFP 101 operating in access point mode, or may be AP 103 .

The Bluetooth I/F 123 is an interface for transmitting and receiving data to and from various peripheral devices by short-range wireless communication. In this embodiment, as an example, wireless communication conforming to Bluetooth (IEEE802.15.1), particularly Bluetooth Low Energy (hereinafter referred to as BLE), is used to execute a cooperative login function that causes a specific user to login to the MFP 101 .

<Software Configuration of Communication Terminal 102>
Next, the software configuration of communication terminal 102 will be described with reference to FIG. FIG. 3 is a functional block diagram of software implemented by the CPU 111 reading the control program stored in the ROM 112 and the storage 114. As shown in FIG.

OS 300 is basic software for controlling the overall operation of communication terminal 102 . The OS 300 is, for example, Android (registered trademark) provided by Google, iOS (registered trademark) provided by Apple, or the like.

Various applications can be installed in the communication terminal 102, including a linked application 310, which will be described later. The OS 300 can exchange information with these applications and change the screen displayed on the operation panel 205 according to instructions received from the applications.

The OS 300 has a framework for controlling hardware of the communication terminal 102 from various applications, and provides functions for using various hardware to applications operating on the OS 300 . The OS 300 also includes a Bluetooth control unit 301 and a wireless network control unit 302 for controlling various hardware from the application. A Bluetooth control unit 301 interprets an instruction from an application, controls the Bluetooth I/F 123, and controls short-range wireless communication with an external terminal.

For example, when performing data transmission/reception with an external device (for example, the MFP 101) using BLE communication, the cooperative application 310 requests the OS 300 to perform data transmission/reception with the external device using BLE communication. Upon receiving the request, the Bluetooth control unit 301 of the OS 300 controls the Bluetooth I/F 123 to implement BLE communication. In addition, the Bluetooth control unit 301 cooperates with the Bluetooth I/F 123 to derive the Bluetooth received signal strength (RSSI: Received SignalStrength Indication) received from the outside. Each application refers to the derived received signal strength by calling a function provided by the OS 300 .

In addition, the cooperative application 310 can call a function provided by the OS as an API (Application Program Interface) or a framework for applications. By calling a function, the cooperative application 310 can switch the AP with which the wireless LAN I/F 122 communicates, and can control data transmission/reception by wireless communication conforming to IEEE802.11. The wireless network control unit 302 controls the wireless LAN I/F 122 based on instructions from the application, and controls wireless communication with external terminals.

The cooperative application 310 stores information indicated by 311 and 312 as internal information. User authentication information 311 is user authentication information used to request login to the MFP 101 . These user authentication information are set via the setting screen of the cooperative application 310 . The device list information 312 stores external devices such as MFPs with which the cooperation application 310 cooperates. The device list stores external device management information including the device name, capability, and connection information for connecting to the external device registered by a user operation or the like. The cooperative application 310 can perform MFP search processing by the user, and accept manual input to register an external device such as an MFP in the device list. When receiving a user operation to select an external device such as an MFP registered in the device list from a selection screen (not shown), the cooperative application 310 changes the external device to be a cooperation destination to the selected external device.

<MFP>
Next, the MFP 101 is described. FIG. 4 is a block diagram showing the hardware configuration of the MFP 101. As shown in FIG. The MFP 101 has a reading function of reading an image and a printing function of printing an image on a sheet.

A control unit 130 including a CPU 131 controls the operation of the entire MFP 101 . The CPU 131 reads control programs stored in the ROM 132 or storage 134 and performs various controls such as print control and read control. The ROM 132 stores control programs executable by the CPU 131 . A RAM 133 is a main memory of the CPU 131 and is used as a work area or a temporary storage area for developing instructions of various control programs. The storage 134 is a storage unit that stores print data, image data, various programs, and various setting information. The storage 134 also stores a user management database for user authentication management.

Note that in the MFP 101 of the present embodiment, one CPU 131 uses one memory (RAM 133) to execute each process shown in a flow chart to be described later, but other modes are also possible. For example, multiple processors, RAMs, ROMs, and storages can cooperate to execute each process shown in the flowcharts described later.

An operation unit I/F 135 connects the operation unit 136 and the control unit 130 . The operation unit 136 includes a liquid crystal display unit having a touch panel function, various hard keys, and the like, and functions as a display unit that displays information and a reception unit that receives user instructions.

A reading unit I/F 137 connects the reading unit 138 and the control unit 130 . A reading unit 138 reads a document and generates a read image. The generated read image is transmitted to an external device or used for printing.

A print unit I/F 139 connects the print unit 140 and the control unit 130 . The printing unit 140 prints an image on a sheet based on print data received from the outside.

Also, the control unit 130 is connected to a network (not shown) via a wired LAN I/F 141 . The wired LAN I/F 141 transmits images and information to an external device on a network (not shown) and receives print data and information from the external device.

Furthermore, the control unit 130 has a wireless LAN I/F 142 and a Bluetooth I/F 143 . The wireless LAN I/F 142 provides a wireless client function for connecting to an external AP and performing wireless communication, and a software AP function for the MFP 101 to act as an AP.

The Bluetooth I/F 143 is an interface for transmitting/receiving data to/from various peripheral devices by short-range wireless communication. The MFP 101 of the present embodiment uses short-range wireless communication conforming to BLE to communicate with the communication terminal 102, and uses the communication terminal 102 to execute a cooperative login function of logging the user into the MFP 101. do.

<Collaboration login function>
Next, the linked login function of this embodiment will be described. Conventionally, a method has been considered in which a communication terminal and an MFP work together to log a user into the MFP. was not considered. For example, the user cannot understand why the login failed because the control sequence is not taken into consideration, such as when the short-range wireless communication settings required to log in to the MFP are not set correctly in the communication terminal. Such cases can occur.

Based on the above problems, in this embodiment, it is possible to improve user convenience by performing detailed control that was not fully considered in a series of login processes using conventional communication terminals. .

First, an overview of the cooperative application 310 of the communication terminal 102 will be described. 5 to 7 illustrate screens displayed on the operation unit 116 of the communication terminal 102. FIG. FIGS. 5A to 5D show examples of screens provided to the user by the cooperative application. When the icon of the cooperative application is selected by the user's operation via the application list screen (also referred to as a drawer) or the home screen of the communication terminal 102 , the CPU 111 activates the cooperative application 310 . The cooperative application 310 displays the top menu screen shown in FIG.

First, the functions of the cooperative application 310 will be described using the top menu screen. An area 501 displays the currently selected cooperation destination MFP. In this embodiment, as an example, the case where the MFP 101 is specified as a cooperation destination is illustrated. By selecting the area 501, the user can change the cooperating MFP, check the status of the cooperating MFP, and the capability of the MFP. An add key 503 is a key that provides a function of registering a new MFP to be a cooperation destination. The user can use the add key 503 to register a new MFP as a cooperation destination. The cooperation application 310 stores, in the device list information 312, the information of the MFP whose registration as a cooperation destination is instructed by the user's operation. After that, the registered MFP can be selected as a cooperating MFP.

The cooperation application 310 can execute various cooperation functions in cooperation with an MFP (for example, the MFP 101) designated as a cooperation destination. For example, it is possible to execute cooperation functions such as print cooperation and scan cooperation. The document key is a key used when image data or document data stored in the communication terminal is transmitted to the cooperating MFP and printed. The scan key is a key that is used when executing a scan cooperation function of scanning a document with the MFP of the link destination and importing the data obtained by scanning into the storage 114 of the communication terminal. The capture key is a key used when capturing an image of a document, whiteboard, or the like using the camera 118 . A print release key is a key used when issuing a print instruction for print data retained in the MFP 101 from the operation unit of the communication terminal 102 .

A key 502 is a key used when executing a cooperative login function for logging in a specific user. When the key 502 is selected, the cooperative application 310 causes the screen displayed on the operation unit 116 to transition to the panel login screen shown in FIG. 5B.

MFPs around the communication terminal 102 are displayed on the panel login screen. An area 511 displays a list of information indicating login destination candidate MFPs that the cooperative application 310 has determined to be around the communication terminal 102 .

The panel login screen also displays information prompting the user to bring the communication device closer to the external device to be logged into. Therefore, in the present embodiment, it is possible to visually notify a user who wants to use the cooperative login function that there is an external device nearby that is a candidate for the cooperative login function. The information indicating the MFP also includes a reception level representing the received signal strength. Therefore, in a case where a login destination candidate with a high reception level cannot be found even though the user approaches the MFP that the user wishes to log in to, it is possible to suggest to the user that login to the MFP is not possible.

The cooperative application 310 detects MFPs as login destination candidates around the communication terminal 102 based on BLE advertising packets transmitted at predetermined intervals (for example, every 30 milliseconds) by surrounding external devices (for example, the MFP 101). It is determined whether or not there is

The advertising packet sent by the MFP 101 includes, for example, the information shown in Table 1.

The cooperative application 310 refers to the Local Name and Manufacturer Specific Data contained in the received advertising packet of the Bluetooth radio wave. Based on the information obtained by referencing, it extracts the external devices it supports from among the external devices transmitting the advertising packet and displays them on the panel login screen. That is, even if the cooperative application 310 receives an advertising packet sent from an external device that cannot provide a login function, it controls not to display it in the area 511 .

A sensitivity adjustment key 512 is used to adjust the Bluetooth sensitivity. For example, the user can select the sensitivity adjustment key 512 to adjust the sensitivity of Bluetooth when the connection to the MFP is unstable. With this function, the threshold value used to determine whether or not the communication terminal 102 is close to the MFP is determined after considering individual differences in the Bluetooth I/F of the communication terminal 102, the material of the housing, the influence of the protective case, the surrounding radio wave environment, and the like. can be calibrated. When the sensitivity adjustment key is selected, the cooperative application 310 displays the sensitivity adjustment screen shown in FIG. 7(a). The sensitivity adjustment screen displays information 701 indicating how to perform sensitivity adjustment. When the OK key 702 is selected, Bluetooth sensitivity adjustment is performed.

Returning to FIG. 5, a method of executing cooperative login will be described. When the cooperative application 310 determines that the communication terminal 102 has sufficiently approached (approached) the MFP 101 transmitting the advertising packet, the cooperative application 310 transmits a login request to the MFP 101 . The MFP 101 that has received the login request determines whether or not to permit the login based on the login request. The MFP 101 notifies the communication terminal 102 of the login result through BLE communication. The cooperative application 310 displays the login success screen shown in FIG. 5(c) when the login is successful, and displays the authentication error screen shown in FIG. 5(d) when the login is unsuccessful.

A pop-up 521 is information indicating that login has succeeded. The pop-up 531 is a notification indicating that login has failed, and is information suggesting to the user that the settings and status of the communication terminal 102 or MFP 101 should be reconfirmed.

In this manner, the user can log in to the MFP 101 simply by bringing the communication terminal 102 closer to the MFP 101 . After user login, the main screen is displayed on the operation unit 136 of the MFP 101 . 13 shows an example of a screen displayed on the operation unit 136 of the MFP 101, and FIG. 13(a) shows an example of the main screen. A user who has executed the linked login function described with reference to FIG. With this function, the user can log in to the MFP simply by holding the communication terminal owned by the user over the MFP. Therefore, it is possible to reduce the trouble of inputting a user ID and a password when logging into the MFP.

Further, in this embodiment, not only the basic login control described with reference to FIG. 5 but also more detailed control is performed. A specific control method will be described below with reference to the flowcharts of FIGS. 8 to 11. FIG.

8 to 10 are flowcharts showing control of the communication terminal 102. FIG. Each operation (step) shown in the flow charts of FIGS. 8 to 10 is realized by the CPU 111 reading a program for realizing each control module stored in the ROM 112 or the storage 114 into the RAM 113 and executing the program. It should be noted that the processing shown in the flowchart is assumed to be realized mainly by the cooperative application 310 in cooperation with the OS 300, which is a control program. It should be noted that each operation is described with the OS 300 or the cooperative application 310 as the main body when clearly showing the control program that causes each operation.

11 is a flow chart showing control of the MFP 101. FIG. Each operation shown in the flow chart of FIG. 11 is realized by the CPU 131 reading a program for realizing each control module stored in the ROM 132 or the storage 134 into the RAM 133 and executing the program.

FIG. 8 is a flowchart showing the operation of communication terminal 102 when the icon of the cooperative application is selected via the drawer or home screen of communication terminal 102 . In S<b>801 , the CPU 111 displays the top menu screen on the operation unit 116 . In S802, the CPU 111 determines whether or not a user instruction to use the cooperative login function has been received. If a user instruction to use the cooperative login function has been received, the process advances to S803, and if a user instruction to use the cooperative login function has not been received, the process advances to S804. A user operation using the linked login function is, for example, an operation of selecting a key 502 displayed on the top menu screen of FIG. 5(a). Details of the cooperative login process in S803 will be described later. In S803, when the cooperative login process is completed, the CPU 111 changes the screen displayed on the operation unit 116 to the top menu screen, and returns to the process of S801.

In S804, the CPU 111 determines whether or not a user instruction to use other functions has been received. If a user instruction to use another function has been received, the process advances to S805, and if a user instruction to use another function has not been received, the process advances to S806. In S805, the CPU 111 executes other functions based on user instructions. For example, CPU 111 can execute a print cooperation function of transmitting image data and document data stored in communication terminal 102 to a cooperative MFP and printing the data. Further, the MFP 101 and the communication terminal 102 can cooperate to scan a paper document, and execute a scan cooperation function of transmitting and saving. Further, for example, the CPU 111 can execute a print release function of issuing a print instruction for print data retained in the MFP 101 from the operation unit of the communication terminal 102 . When the execution of the function based on the user instruction is completed, the CPU 111 changes the screen displayed on the operation unit 116 to the top menu screen, and returns to the process of S801.

Subsequently, in S806, the CPU 111 determines whether or not an instruction to terminate the application has been received. When receiving an instruction to end the application, CPU 111 stops executing cooperative application 310, changes the screen displayed on operation unit 116 to the home screen provided by the home application of the OS, and ends the series of controls. . On the other hand, if an instruction to terminate the application has not been received, the process returns to S801.

In this way, while the cooperative application 310 is activated, the user can execute various cooperative functions including the cooperative login function.

Next, specific control of the cooperative login function will be described with reference to FIG. 9 . The flowchart of FIG. 9 describes exception processing when the cooperative login function cannot be executed due to settings or status on the communication terminal 102 side.

In S<b>901 , the CPU 111 determines whether the wireless communication function using the Bluetooth I/F 123 is enabled as the operation setting of the communication terminal 102 . The cooperative application 310 inquires of the OS 300 whether the wireless communication function is valid. If it is determined to be valid based on the result of the inquiry, the process advances to S904. If it is determined that the request is not valid (that is, invalid) based on the result of the inquiry, the process proceeds to S902.

In S902, the CPU 111 displays an error notification screen regarding the Bluetooth function. FIG. 6C shows an example of the error notification screen displayed in S902. A pop-up 621 is displayed on the error notification screen to notify the user that Bluetooth of the communication terminal 102 should be turned on.

In S903, the CPU 111 switches the screen displayed on the operation unit 116 to the Bluetooth setting screen provided by the OS. Specifically, when accepting the selection of the OK key by the user, the cooperative application 310 requests the OS 300 to change the screen displayed on the operation unit 116 to the Bluetooth setting screen provided by the OS. The OS 300 switches the screen displayed on the operation unit 116 to the Bluetooth setting screen while the cooperative application 310 is running in the background. The user can change the setting to enable (ON) or disable (OFF) the wireless communication function using the Bluetooth I/F 123 via the Bluetooth setting screen. In this embodiment, as an example, after displaying the popup of S902, the OS setting screen is displayed, but the present invention is not limited to this. Instead of displaying the popup of S902, the screen may be changed to the OS setting screen of S903.

The OS 300 switches the screen displayed on the operation unit 116 to the screen of the cooperative application 310 when receiving an operation to return from the setting screen to the original screen (for example, a user operation to close the setting screen). The cooperative application 310 transitions the screen displayed on the operation unit 116 to the top menu screen, and ends the processing of S803.

Through the processing of S902 and S903, the user can effectively change the wireless communication function using the Bluetooth I/F 123 simply by performing operations along a series of screen transitions provided by the cooperative application 310. FIG.

Subsequently, in S904, the CPU 111 determines whether user authentication information is set. If the user authentication information is set in the user authentication information 311 of the cooperative application 310, the CPU 111 advances the process to S908. On the other hand, if the user authentication information is not set in the user authentication information 311 of the cooperative application 310, the CPU 111 advances the process to S905.

In S905, the CPU 111 displays an error screen notifying that the user information has not been set. FIG. 6B shows an example of the error screen displayed in S905. A pop-up 611 is displayed on the error screen to notify the user that user information needs to be set.

In S906, when the CPU 111 accepts selection of the OK key by the user, the screen displayed on the operation unit 116 is switched to the user information setting screen. FIG. 7B exemplifies a user information setting screen provided by the cooperative application 310 displayed in S906.

The user can enter user authentication information in area 711 to set the user authentication information. In S911, the CPU 111 accepts input of user authentication information. When the OK key is selected, CPU 111 updates user authentication information 311 based on the user authentication information entered in area 711 . When the update is completed, the CPU 111 changes the screen displayed on the operation unit 116 to the top menu screen, and ends the processing of S803. Through these processes of S905 to S907, the user can perform user authentication settings required for the cooperative login function along with a series of screen transitions.

In S908, the CPU 111 determines whether there is an external device registered as a cooperation destination. If one or more pieces of management information are stored in the device list information 312 of the cooperative application 310, the process advances to step S912. On the other hand, if one or more pieces of management information are not stored in the device list information 312 of the cooperative application 310, the process advances to step S909.

In S909, the CPU 111 displays an error screen notifying that there is no MFP registered as a cooperation destination. FIG. 6D shows an example of the error screen displayed in S909. The error screen displays a pop-up 631 notifying that the MFP must be registered as a cooperation destination.

In S<b>910 , when CPU 111 accepts selection of the OK key by the user, CPU 111 switches the screen displayed on operation unit 116 to a registration screen for registering a nearby MFP as a cooperation destination. FIG. 7C exemplifies a registration screen for registering nearby MFPs provided by the cooperative application 310 displayed in S910.

The registration screen displays items indicating MFPs around the communication terminal 102 . Here, an example is shown in which the MFP 101 and the MFP 102, which is an external device different from the MFP 101, are found by searching for advertising packets. The user can select an item 721 or 722 to register the MFP corresponding to the item as an external apparatus to be linked.

Returning to the description of FIG. 9, in S911, the CPU 111 accepts the registration process of the external device based on the user's operation via the registration screen. CPU 111 stores, in device list information 312 managed by cooperation application 310, information about the MFP for which an instruction to register as a cooperation destination has been issued. After that, the registered MFP can be selected as a cooperating MFP. Also, in a series of registration processes, pairing processing between BLE devices is performed, and a long term key (LTK), which is an encryption key for keeping communication between devices secure, is exchanged. By this processing, it is possible to reduce the trouble of inputting a PIN (Personal Identification Number) code required for pairing in subsequent BLE communication.

When the registration process is completed, the CPU 111 changes the screen displayed on the operation unit 116 to the top menu screen, and ends the process of S803.

If there is no link destination MFP registered in advance by the processing of S909 to S912, processing for registering the MFP to be used as the link destination can be performed before using the login link function. In addition, since pairing between devices is performed in advance in a series of registration processes, it is possible to suppress the occurrence of a PIN code input operation when subsequent cooperative login processes using BLE communication are performed.

In the case where it can be determined in advance that the settings used for the login process are not properly set by the processing of each of the steps above, by notifying the user at a stage before searching for peripheral external devices, Useless user operations can be suppressed.

Subsequently, in S912, control related to login processing is executed from the actual search for peripheral external devices. The processing of S912 will be described using the flowchart of FIG.

In S1001, the CPU 111 displays the panel login screen described with reference to FIG. 5B. In S1002, the CPU 111 starts receiving radio waves for BLE communication. Specifically, the cooperative application 310 requests the OS 300 to start receiving BLE communication radio waves in order to receive BLE communication radio waves. The OS 300 controls the Bluetooth I/F 123 via the Bluetooth control unit 301 to start receiving Bluetooth advertising packets. The OS 300 notifies the cooperation application 310 of the received Bluetooth advertising packet and the received signal strength of the advertising packet. The cooperative application 310 temporarily stores the received advertising packet and the reception strength of the packet.

In S1003, the CPU 111 determines whether or not an MFP whose received signal strength is Near or higher has been detected. In the present embodiment, for example, Near is the received signal strength assumed that the approximate distance between the MFP 101 and the communication terminal 102 is around 3 m. Based on the analysis result of the advertising packet, the cooperative application 310 advances the process to S1004 if the packet is transmitted from a supporting MFP and the received signal strength of the packet is Near or higher. On the other hand, if the packet is transmitted from an unsupported external device or if the received signal strength of the received advertising packet is smaller than Near, the processing of S1004 is skipped and the processing proceeds to S1005.

In S1004, the CPU 111 displays information indicating the MFP to be logged in on the panel login screen displayed in S1001. When advertising packets with received signal strengths of Near or higher are received from a plurality of MFPs, information indicating the plurality of MFPs is displayed. The order of priority for displaying information may be rearranged as appropriate, such as in order of received signal strength.

In S1005, the CPU 111 determines whether or not an MFP having a received signal strength equal to or greater than Touchlike has been detected. In this embodiment, for example, the received signal strength assumed to be around 3 cm, which is the approximate distance between the MFP 101 and the communication terminal 102, is defined as Touchlike. Based on the analysis result of the advertising packet, the cooperative application 310 advances the processing to S1008 if the packet is transmitted from a supporting MFP and the received signal strength of the packet is equal to or higher than Touchlike. On the other hand, if the packet is transmitted from an unsupported external device or if the reception signal strength of the received advertising packet is smaller than Touchlike, the process proceeds to S1006.

It is assumed that the Touchlike and Near thresholds are calibrated in advance for the communication terminal 102 by the sensitivity adjustment function described with reference to FIG. 7(a). Note that in the case where the sensitivity adjustment has never been performed, the initial value set at the time of application installation is used.

In S<b>1006 , the CPU 111 determines whether or not a certain period of time has passed since reception of BLE radio waves was started. If a certain period of time has passed since BLE radio wave reception started, the process advances to S1007, and if a certain period of time has not passed since BLE radio wave reception started, the process returns to S1003 to perform MFP search processing. continue.

In S1007, the CPU 111 displays a detection error screen indicating that proximity between the MFP and the communication terminal could not be detected. FIG. 6A shows an example of the detection error screen displayed in S1007. A pop-up 601 is displayed on the detection error screen to notify that the communication terminal needs to be brought closer, and that sensitivity adjustment should be performed if the problem is not improved. When the CPU 111 detects that the OK button has been selected, the process returns to S1002 and resumes searching for nearby MFPs. Note that if no MFP having a received signal strength of Near or higher is found, a pop-up may be displayed to indicate that no MFP was found in the vicinity.

Subsequently, in S1008, the CPU 111 determines whether there is one MFP whose received signal strength detected in S1005 is equal to or greater than Touchlike. If there is one MFP whose received signal strength is Touchlike or more detected in S1005, the process proceeds to S1009.If there is not one MFP whose received signal strength is Touchlike or more detected in S1005, the process proceeds to S1007. . Note that the processing of S1008 is exception processing for suppressing transmission of login requests to a plurality of MFPs.

In S<b>1009 , the CPU 111 determines whether the MFP detected in S<b>1005 is the MFP stored in the device list information 312 . If the detected MFP is the MFP stored in the device list information 312, the process advances to step S1010. proceed to

In S1010, the CPU 111 establishes a BLE connection with the MFP detected in S1005. In the following steps, for the sake of explanation, a case where communication terminal 102 detects an advertising packet of MFP 101 with reception strength equal to or higher than Touchlike will be described as an example.

When the BLE connection with the MFP 101 is established, the MFP 101 and the communication terminal 102 are ready for GATT (Generic Attributes) communication. Specifically, the cooperative application 310 requests the OS 300 to start BLE communication with the MFP 101 in order to start BLE communication. The OS 300 controls the Bluetooth I/F 123 via the Bluetooth control unit 301 to start BLE communication with the MFP 101 .

Here, GATT communication will be described. The MFP 101 of this embodiment includes a GATT server that publishes various services defined by a GATT profile for transmitting and receiving data to and from an external terminal via BLE. FIG. 12 is a diagram for explaining GATT communication, and shows an example of a GATT server published by the MFP 101. As shown in FIG. A user authentication service 1200, a Wi-Fi AP mode start/stop service 1207, and a Wi-Fi (registered trademark) connection information acquisition service 1208 are open to the public on the GATT server.

The user authentication service 1200 has the following characteristics defined in the GATT profile. Profiles and characteristics in GATT are like object-oriented classes and member variables. The CPU 131 of the MFP 101 reads and writes the value of each characteristic when there is a change in the login status of the user of the MFP 101 .

A StatusID 1201 is a characteristic that indicates the status of the login availability of the MFP 101 . The communication terminal 102 reads the StatusID 1201 to acquire the status of the login availability of the MFP 101 . The MFP 101 stores the values shown in Table 2 (login availability status list) as the value of the StatusID 1201 .

This value is changed by the CPU 131 when the user login state or screen transition state of the MFP 101 changes. Note that when the value of the StatusID 1201 is changed, the communication terminal 102 that is in BLE connection is notified of the value change by Notification in Attribute Protocol (ATT). The StatusID of "4" will be described with reference to FIG. 13(b). FIG. 13B exemplifies the administrator setting screen of the MFP 101. As shown in FIG. The MFP 101 of this embodiment can switch ON/OFF of the user authentication function and ON/OFF of the cooperative login function as the operation setting of the MFP 101 . The administrator of the MFP 101 can change the operation settings of the MFP 101 through the screen of FIG. 13(b). The MFP 101 switches the operation of the user authentication function according to the setting.

Here, when user authentication is set to OFF, the MFP 101 is in a state where each function of the MFP 101 can be used via the operation unit 136 without requesting the user to log in. Therefore, the MFP 101 stores "4" in StatusID. Even if user authentication is set to ON, local login in cooperation with the communication terminal 102 must be prohibited if the cooperative login function is set to OFF. Therefore, the MFP 101 stores "4" in StatusID.

Returning to FIG. 12, another characteristic of the user authentication service 1200 will be described. UserName 1202, Password 1203, and DomainName 1204 are characteristics for writing user identification information when communication terminal 102 requests login.

RequestID 1205 is a characteristic for communication terminal 102 to write a request to the user authentication service. 1202 to 1205 are configured so that values can be written from an external device that has established BLE communication. Also, 1202 to 1205 may be configured as characteristics that require encryption for access.

The communication terminal 102 writes 1 indicating a login request, 2 indicating a logout request, or the like to the RequestID 1205 . When the CPU 131 of the MFP 101 receives an instruction to write 1 in the RequestID 1205 from the communication terminal 102, user authentication is performed based on the user identification information written in 1202 to 1204 (that is, authentication information received through BLE communication).

The ResultId 1205 is a characteristic that stores the authentication result (success or failure of the login result) when the MFP 101 receives a login request from the communication terminal 102 and performs user authentication. For example, the MFP 101 writes a value indicating login success, login failure, etc. in ResultId 1205 as the authentication result. It is assumed that when the MFP 101 stores the authentication result in the ResultId 1205, the communication terminal 102 in BLE connection is notified of the value change of the authentication result by Notification in ATT.

A Wi-Fi AP mode start/stop service 1207 is a service used when switching the operation mode of the access point of the MFP 101 from the communication terminal. A Wi-Fi connection information acquisition service 1208 is a service used when acquiring connection information to the MFP from a communication terminal. These services are appropriately used when handing over from BLE communication to wireless communication conforming to IEEE802.11.

In this manner, the communication terminal 102 performs two-way BLE communication with the MFP 101 by reading and writing the GATT server characteristic published by the MFP 101 .

Returning to the description of FIG. 10, in S1011, the CPU 111 acquires the local login state of the MFP. Specifically, the cooperative application 310 and the OS 300 cooperate to access the user authentication service 1200 published by the MFP 101 and acquire the value of the characteristic (StatusID 1201 in FIG. 12) indicating the local login status. do.

Next, in S1012, the CPU 111 determines whether the target MFP 101 is in a login-enabled state based on the local login state acquired in S1009. Specifically, when the StatusID 1201 is "1", the CPU 111 determines that login is possible, and advances the process to S1013. On the other hand, when the StatusID 1201 is other than "1", the CPU 111 determines that login is not possible (login is not possible), and advances the process to S1016.

In S1013, the CPU 111 transmits a login request to the MFP 101 using BLE communication. Specifically, the cooperative application 310 and the OS 300 cooperate to write UserName 1202 , Password 1203 , and DomainName 1204 of the MFP 101 based on the user credential stored in the user authentication information 311 . Furthermore, the cooperative application 310 and the OS 300 cooperate to write a value indicating a login request to the RequestID 1205 .

In S1014, the CPU 111 determines whether the login has succeeded. When the authentication based on the login request is performed on the MFP 101 side and a value is written in the ResultId 1205 as a result, the communication terminal 102 is notified by Notification of ATT that the value has been changed. In response to this notification, the CPU 111 acquires the ReultID 1206 from the MFP 101 via BLE communication and determines whether or not login has succeeded. If a value indicating login success is obtained as ReultID, the process proceeds to S1015, and if a value indicating login failure is obtained as ReultID, the process proceeds to S1016.

In S1015, the CPU 111 displays the login success screen illustrated in FIG. 5(c). On the other hand, in S1016, the CPU 111 displays the authentication error screen illustrated in FIG. 5(d). Note that the content of the popup 531 displayed on the authentication error screen differs depending on the type of login error. FIG. 5D shows, as an example, an error screen when it is determined that authentication has failed in S1014. The popup in FIG. 5D can suggest to the user that there may be a mistake in the setting of the user authentication information in the cooperative application 310 . Next, the case of other login errors will be described. For example, the CPU 111 notifies the user why the error occurred according to the value of StatusID acquired in S1011. For example, when the value of StatusID is "2", a notification such as "Cannot log in because the user is already logged in" is issued. Also, when the value of StatusID is "3", a notice such as "You cannot log in because another screen is displayed. Please try again after switching to the login screen." Also, if the value of StatusID is "4", a notice such as "You cannot log in because the MFP panel log-in function is not permitted. Please contact the MFP administrator for details."

<Processing on the MFP side>
Next, control on the MFP 101 side that receives a login request from the communication terminal 102 will be described with reference to FIG. 12 . For the sake of explanation, FIG. 12 illustrates control when the MFP 101 can accept a login request from a mobile terminal.

In S1101, the CPU 131 receives a login request from the communication terminal 102 through BLE communication. In S1202, user authentication processing is executed based on the login request received in S1101. Specifically, the CPU 131 acquires the user authentication information obtained by reading the values 1202 to 1204 that are the characteristics of the user authentication service 1200 . Based on the acquired user authentication information, it is determined whether or not a matching user account is managed in the user management database stored in the storage 134 . If there is a matching user account, the authentication is OK. If there is no matching user account, the authentication is NG. In S1103, the CPU 131 determines whether or not to permit login based on the authentication result in S1102. If the authentication result is OK, the process advances to S1105. If the authentication result is NG, the process proceeds to S1104. Although a case where a user management database inside the MFP 101 is used for user authentication is illustrated here, the present invention is not limited to this. For example, an external LDAP (Lightweight Directory Access Protocol) server or the like can be used for user authentication. In this case, the MFP 101 transmits user authentication information to the LDAP server and requests the LDAP server to perform user authentication processing. Also, the MFP 101 may determine whether or not to permit login based on the authentication result received from the LDAP server.

In S1104, the CPU 131 updates the authentication result and notifies the mobile terminal of the authentication result. The CPU 131 writes information indicating login failure in the ResultId 1205 . When a value is written in ResultID 1206, the communication terminal 102 is notified by Notification of ATT that the value has been changed. When the processing of S1104 is completed, the series of processing upon reception of a login request ends. In addition to notifying the mobile terminal, the CPU 131 also displays a pop-up on the operation unit 136 to notify that login has failed.

In S<b>1106 , the CPU 131 displays the main screen on the operation unit 136 . Note that the user can use each function of the MFP 101 via the main screen displayed on the operation unit 136 . Note that the screen displayed in S1105 can be appropriately changed according to the authority of the logged-in user and the personal settings of the logged-in user.

Through the series of processes described so far, the user can log in to the MFP 101 simply by holding his or her own communication terminal over the MFP 101 instead of entering a user ID and password when logging in to the MFP. become.

Subsequently, in S1106, the CPU 131 updates the authentication result, updates the local login information, and notifies the mobile terminal of the authentication result. The CPU 131 writes a value indicating login success in the ResultId 1205 . When a value is written in ResultID 1206, the communication terminal 102 is notified by Notification of ATT that the value has been changed. Also, the CPU 131 writes “2” to the StatusID 1201 as local login information. When the process is completed, the process advances to S1107.

In S<b>1107 , the CPU 131 determines whether or not a user instruction to execute a function has been received via the operation unit 136 . If a user instruction to execute a function has been received via the operation unit 136, the process advances to S1108, and if a user instruction to execute a function has not been received via the operation unit 136, the process advances to S1109.

In S1108, the CPU 131 executes the function according to the user's instruction. For example, a copy function for printing an image obtained by scanning a document with the printing unit 140, a facsimile function for facsimile transmission of an image obtained by scanning, and the like are executed according to user instructions. When execution of the function is completed, the process advances to S1109.

In S1109, the CPU 131 determines whether or not an instruction to log out the user has been received. If the instruction to log out the user has been received, the process advances to S1110, and if the instruction to log out the user has not been received, the process returns to S1107.

In S1110, the CPU 131 performs logout processing and update of the local login state. "1" indicating that login is possible is written in StatusID.

In S1111, the CPU 131 displays a login screen (not shown) on the operation unit 136, and ends the series of processes.

As described above, in the present embodiment, appropriate notification control is performed when logging in from a communication terminal to a surrounding external device, so convenience for the user can be improved. Further, according to the present embodiment, the cooperative login function with the communication terminal 102 can appropriately notify the user of various error factors that occur due to combinations of settings of each device, status of each device, and the like. become.

In addition, since the user is notified at each step in FIG. 9, the user can be notified at an early stage in the sequence of login processing. Therefore, unnecessary user operations can be suppressed.

<Modification>
In the first embodiment, the local login state is confirmed in S1011 of FIG. 10, and if the user has already logged in, local login using the communication terminal is NG. is not limited to For example, even if a user has already logged in to the MFP 101, it is possible to configure so that priority is given to local login using a communication terminal. In this case, the communication terminal 102 writes a logout request to the RequestID 1205 to logout the user currently logged in to the MFP 101 . After that, the process after S1013 may be executed again.

Further, in the present embodiment, the received signal strength of the advertising packet is used to determine the degree of proximity of external devices such as MFPs around the communication terminal 102, but the present invention is not limited to this. For example, the distance between devices may be estimated from the ratio of the transmitted signal strength (Tx) included in the advertising packet and the received signal strength, and the degree of proximity may be determined based on the distance. Also, for example, it is possible to determine the degree of proximity between the communication terminal and the external device to be logged in using another method such as Wi-Fi Aware (registered trademark).

<Other embodiments>
The present invention supplies a program that implements one or more functions of each of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in the computer of the system or apparatus reads the program. It can also be realized by executing processing. It can also be realized by a circuit (for example, ASIC or FPGA) that realizes one or more functions.

101 MFPs
102 communication terminal 111 CPU
114 Storage 123 Bluetooth I/F

Claims (41)

a Bluetooth communication interface;
a display for displaying information;
means for executing detection processing of a printer that satisfies a predetermined condition using the Bluetooth communication interface;
and means for displaying a notification of Bluetooth communication sensitivity adjustment on the display unit after a predetermined period of time has elapsed since the start of the detection process. A control method for a communication terminal including a Bluetooth communication interface and a display unit for displaying information,
a step of detecting a printer that satisfies a predetermined condition using the Bluetooth communication interface;
and causing the display unit to display a notification of sensitivity adjustment of Bluetooth communication based on a lapse of a predetermined time from the start of the detection process. A program executed by a communication terminal having a Bluetooth communication interface and a display unit for displaying information,
a step of detecting a printer that satisfies a predetermined condition using the Bluetooth communication interface;
and causing the display unit to display a notification of Bluetooth communication sensitivity adjustment related to the detection process after a predetermined time has elapsed since the start of the detection process. 4. The program according to claim 3, further comprising means for displaying an adjustment screen for executing said sensitivity adjustment on said display unit. 5. The program according to claim 4, further comprising means for displaying a detection screen on said display unit during execution of said detection processing, said detection screen having a selection object for transitioning to said adjustment screen. . obtaining an advertising packet via the Bluetooth communication interface;
a step of acquiring the radio wave intensity at the time of reception of the advertising packet;
determining a printer with which to establish communication based at least on the radio wave intensity;
6. The program according to any one of claims 3 to 5, comprising: 7. The program according to claim 6, further comprising the step of displaying on said display unit a screen prompting the user to bring the communication terminal closer to the printer with which communication is to be established. 8. The program according to claim 6, further comprising the step of making a login request to the printer with which communication has been established. 9. The function of cooperating with the printer includes at least one of a login function, a print function, a scan function, a camera function, and an address transmission function. The program described in Section. The function related to printing includes at least one of a function of transmitting image data or document data held by the communication terminal and a function of instructing printing of a document held by the printer. 10. A program according to claim 9. further comprising registering one or more printers;
9. The program according to claim 8, wherein if the login destination printer is not registered, the login request is not sent even if other conditions are satisfied. Displaying a setting screen for setting authentication information including at least one of a user ID and a password on the display unit;
9. The program according to claim 8, wherein said authentication information is information used for said login request. 13. The program according to claim 12, wherein said setting screen is a screen capable of receiving settings of a guest user. 13. The program according to claim 12, wherein the setting screen is a screen capable of accepting settings for using the same user information at the time of printing. 13. The program according to claim 12, further comprising a step of causing the display unit to display a screen for notifying a user of the setting of authentication information based on the fact that the authentication information is not set on the setting screen. 16. The program according to any one of claims 3 to 15, wherein said Bluetooth communication interface supports Bluetooth Low Energy (BLE) communication. 17. The program according to any one of claims 3 to 16, wherein Bluetooth communication using a GATT profile is executed with a printer determined as a communication destination. 18. The program according to any one of claims 3 to 17, being an application executed on an operating system (OS) of said communication terminal. a short-range wireless communication interface for performing short-range wireless communication;
a display for displaying information;
means for executing detection processing of one printer satisfying a predetermined condition using the short-range wireless communication interface;
and means for displaying a notification of sensitivity adjustment of the short-range wireless communication on the display unit when the printer cannot be detected by the detection process. The means for displaying causes the display unit to display the notification of the sensitivity adjustment of the short-range wireless communication and the notification corresponding to the undetection of the printer by the short-range wireless communication when the printer cannot be detected by the detection process. 20. The communication terminal according to claim 19, characterized by: 21. A communication terminal according to claim 19 or 20 , wherein said short-range wireless communication interface is a Bluetooth communication interface. A control method for a communication terminal including a short-range wireless communication interface for performing short-range wireless communication and a display unit for displaying information,
using the short-range wireless communication interface to detect one printer that satisfies a predetermined condition;
and causing the display unit to display a notification of sensitivity adjustment of the short-range wireless communication when the printer cannot be detected by the detection process. In the displaying step, when the printer cannot be detected by the detection process, the notification of sensitivity adjustment of the short-range wireless communication and the notification corresponding to the failure of the printer to be detected by the short-range wireless communication are displayed on the display unit. 23. The control method according to claim 22 , characterized in that: 24. The control method according to claim 22 or 23 , wherein said short-range wireless communication interface is a Bluetooth communication interface. A program executed by a communication terminal including a near field communication interface for performing near field communication and a display unit for displaying information,
using the short-range wireless communication interface to detect one printer that satisfies a predetermined condition;
a step of displaying a notification of sensitivity adjustment of the short-range wireless communication on the display unit when the printer cannot be detected by the detection process;
A program characterized by executing In the step of displaying, when the printer cannot be detected by the detection process, the notification of the sensitivity adjustment of the short-range wireless communication and the notification corresponding to the failure of the printer to be detected by the short-range wireless communication and the sensitivity adjustment are executed. 26. The program according to claim 25 , causing the display unit to display a selection object for transitioning to an adjustment screen for . 27. The program according to claim 25 , wherein said short-range wireless communication interface is a Bluetooth communication interface. 28. The program according to any one of claims 25 to 27 , characterized in that, in the detection process, the display unit displays a screen prompting the user to bring the communication terminal closer to the printer with which communication is to be established. obtaining a signal via the near field communication interface;
a step of acquiring the radio wave intensity of the acquired signal,
29. The program according to any one of claims 25 to 28 , wherein said predetermined condition is that said radio wave intensity is equal to or greater than a threshold. 30. The program according to claim 28 , further comprising the step of making a login request to the printer with which communication has been established. 31. The function for linking with the printer includes at least one of a login function , a print function, a scan function, a camera function, and an address transmission function. The program described in Section. The function related to printing includes at least one of a function of transmitting image data or document data held by the communication terminal and a function of instructing printing of a document held by the printer. 32. A program as claimed in claim 31 . further comprising registering one or more printers;
31. The program according to claim 30 , wherein if the login destination printer is not registered, the login request is not sent even if other conditions are met. Displaying a setting screen for setting authentication information including at least one of a user ID and a password on the display unit;
31. The program according to claim 30 , wherein said authentication information is information used for said login request. 35. The program according to claim 34 , wherein said setting screen is a screen capable of receiving settings of a guest user. 35. The program according to claim 34 , wherein the setting screen is a screen capable of accepting settings for using the same user information when printing. 37. The method according to any one of claims 34 to 36 , further comprising the step of displaying, on the display unit, a screen for notifying the user of the setting of the authentication information based on the fact that the authentication information is not set on the setting screen. The program described in Section. 28. The program of claim 27 , wherein the Bluetooth communication interface supports Bluetooth Low Energy (BLE) communication. 28. The program according to claim 27 , which executes Bluetooth communication using a printer determined as a communication destination and a GATT profile. 40. The program according to any one of claims 25 to 39 , being an application executed on an operating system (OS) of said communication terminal. 30. The program according to claim 29 , wherein said signal is an advertising packet.

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