CN110290594B

CN110290594B - Connection router judgment method and equipment control system

Info

Publication number: CN110290594B
Application number: CN201811025451.5A
Authority: CN
Inventors: 笠原贤哉; 长谷川亮
Original assignee: Hitachi Global Life Solutions Inc
Current assignee: Hitachi Global Life Solutions Inc
Priority date: 2018-03-14
Filing date: 2018-09-04
Publication date: 2023-03-14
Anticipated expiration: 2038-09-04
Also published as: JP6694461B2; JP2019161493A; TW201939977A; CN110290594A; TWI681686B

Abstract

The invention provides a connection router determination method and a device control system, which assist the connection of the device to the router of the connection target of the communication partner when the communication device of the communication partner is connected to any of a plurality of routers. An equipment control system comprising a smartphone (1) having a wireless communication function unit and a display unit, a home appliance (4) having a wireless communication function unit, and a plurality of wireless LAN routers (2), wherein the wireless communication function unit of the home appliance (4) maintains a connection with any one of the plurality of wireless LAN routers (2); the wireless communication function unit of the smartphone (1) is connected to any one of a plurality of wireless LAN routers (2); a display unit of a smartphone (1) outputs a warning when a wireless LAN router (2) to which the smartphone is connected does not coincide with a wireless LAN router (2) to which a home appliance (4) is connected.

Description

Connection router judgment method and equipment control system

Technical Field

The invention relates to a connection router judgment method and a device control system.

Background

In recent years, household electric appliances such as a vacuum cleaner, a washing machine, a refrigerator, and an air conditioner, which can be connected to the Internet, have become widespread as an Internet of Things (IoT). This makes it possible to obtain information on home electric appliances from the outside and to perform operations. Such home appliances are locally connected to an indoor wireless network and connected to the internet via the wireless network, more often than they have a communication function in which the home appliances are directly connected to the internet.

Patent document 1 describes a projector connected to an access point via a wireless network.

Patent document 2 describes a printer supporting a wireless network.

In general households, it is not uncommon for a plurality of wireless LAN (Local Area Network) routers and Network-connectable home appliances to be present. On the other hand, patent document 3 describes a method of identifying an area where a wireless LAN terminal is located.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2010-219853

Patent document 2: japanese patent laid-open No. 2006-333083

Patent document 3: japanese patent laid-open publication No. 2004-328524

Disclosure of Invention

Problems to be solved by the invention

In order to operate a home appliance from a terminal such as a smartphone, an operation called pairing is generally performed to avoid an unauthorized operation or the like, and only an operation from a paired device is possible. When a plurality of wireless LAN routers are present indoors, by designating 1 wireless LAN router as a connection destination of the home appliance when pairing is performed, the smartphone and the home appliance can communicate via the wireless LAN router after pairing.

However, there is a possibility that a wireless LAN router to which a smartphone is usually connected after pairing is a router different from a wireless LAN router to which a home appliance is connected. This is because the wireless LAN router to be connected normally is determined by a simple method such as selecting the same router as the previous connection destination.

In this case, when a wireless LAN router other than the wireless LAN router to which the home appliance is connected is normally connected to the smartphone, the smartphone and the home appliance cannot communicate with each other although the pairing is successful.

In this way, when switching the connection from the paired home appliance to the wireless LAN, the wireless LAN router to which the smartphone is automatically connected may not be expected by the user. Therefore, when a home appliance is operated from an operation terminal via a wireless LAN local network, if a plurality of wireless LAN routers are present indoors, communication cannot be performed in the local network without special measures.

Therefore, a main object of the present invention is to assist the connection of the own device to a router of a connection destination of a communication partner when the communication device of the communication partner is connected to any one of a plurality of routers.

Means for solving the problems

In order to solve the above problem, the present invention is a connection router determination method executed in an environment including a first communication device having a wireless communication function section and a display section, a second communication device having a wireless communication function section, and a plurality of wireless routers, the method comprising:

a step in which a wireless communication function unit of the second communication device maintains a connection with any one of the plurality of wireless routers;

a step in which a wireless communication function unit of the first communication device is connected to any one of the plurality of wireless routers; and

and a step in which the display unit of the first communication device outputs a warning when the wireless router to which the first communication device is connected does not coincide with the wireless router to which the second communication device is connected.

Other solutions are described later.

Effects of the invention

According to the present invention, when a communication device of a communication partner is connected to any one of a plurality of routers, connection of the communication device to the router of the connection destination of the communication partner can be assisted.

Drawings

Fig. 1 is a block diagram of a plant control system according to an embodiment of the present invention.

Fig. 2 is a configuration diagram of a device control system when a plurality of home electric appliances exist according to an embodiment of the present invention.

Fig. 3 is a detailed configuration diagram of a smart phone and a home appliance related to the device control system of fig. 1 according to an embodiment of the present invention.

Fig. 4 is a block diagram showing a signal flow in connection after pairing with respect to the smartphone of fig. 3 according to an embodiment of the present invention.

Fig. 5 is an explanatory diagram showing initial data of connection information according to an embodiment of the present invention.

Fig. 6 is an explanatory diagram showing connection information of entries of the home appliance of fig. 1 registered with respect to the initial data of fig. 5 according to an embodiment of the present invention.

Fig. 7 is an explanatory diagram showing connection information in which an entry of the home appliance of fig. 2 is also registered with respect to the data of fig. 6 according to an embodiment of the present invention.

Fig. 8 is a flowchart showing an operation when the application units are aligned according to the embodiment of the present invention.

Fig. 9 is a flowchart showing an operation of connection confirmation after the pairing operation of fig. 8 according to an embodiment of the present invention.

Fig. 10 is a flowchart showing a connection operation when a paired home appliance is selected as an operation target from an application unit according to an embodiment of the present invention.

Fig. 11 is an example of display screens of various messages described in fig. 9 and 10 according to an embodiment of the present invention.

Fig. 12 is a sequence diagram focusing on a plurality of apparatuses constituting the appliance control system of fig. 1 according to an embodiment of the present invention.

Detailed Description

An embodiment of the present invention is described in detail below with reference to the drawings.

Fig. 1 is a block diagram of an appliance control system. The device control system includes a smartphone (first communication device) 1,

wireless LAN routers

2a, 2b (a plurality of wireless routers), and an electric home appliance (second communication device) 4a. In this device control system, a plurality of

wireless LAN routers

2a and 2b are disposed in the same room or the same house. Thereby, radio waves can be made to cover various corners in the space.

The smartphone 1 includes a CPU (Central Processing Unit), a memory, a storage device, and a touch panel, and is configured as a portable computer that executes a program read from the storage device into the memory.

The household electrical appliance 4a is a household electrical appliance such as a washing machine, a refrigerator, an air conditioner, a self-propelled dust collector with wheels and the like. In the following description, the home appliance 4 is referred to as "home appliance 4" unless it is described as being dependent on the individual home appliance 4a.

The

wireless LAN routers

2a and 2b are relay devices for connecting the smartphone 1 and the home appliance 4 to an external network (not shown) such as a server on the internet, and also relay communication (local communication) between the smartphone 1 and the home appliance 4. In the following description, the wireless LAN router 2 is referred to as a "wireless LAN router 2" without depending on the description of the individual

wireless LAN routers

2a and 2b.

In the present embodiment, for ease of explanation, a situation where a plurality of wireless LANs to be connected to the smartphone 1 are present at the same time is described as an example where a plurality of wireless LAN routers 2 are physically arranged. On the other hand, the situation where a plurality of wireless LANs as connection targets exist simultaneously can be applied to an example where 1 wireless LAN router 2 forms a plurality of wireless LANs (a wireless LAN in a 5GHz band, a wireless LAN in a 2.4GHz band, and the like).

Hereinafter, wireless connections 71 to 74 formed in accordance with the Wi-Fi (registered trademark) or other wireless LAN standards will be described.

The smartphone 1 is connected to the wireless LAN router 2a via the wireless connection 74, and can be connected to the internet using the wireless LAN router 2a as a relay device. Alternatively, even if the smartphone 1 is connected to the wireless LAN router 2b via the wireless connection 73, the smartphone can be connected to the internet using the wireless LAN router 2b as a relay device. That is, the smartphone 1 is connected to one wireless LAN router 2 using either one of the wireless connection 74 and the wireless connection 73.

On the other hand, in order to connect to the internet via the wireless LAN router 2, the home appliance 4a needs to request the smartphone 1 to notify setting information for connection to the wireless LAN router 2. Therefore, the smartphone 1 and the home appliance 4a are directly connected by the wireless connection 71, and the process of exchanging information of the devices is performed via the wireless connection 71. This information exchange process is hereinafter referred to as "pairing".

The home appliance 4a receives the setting information of the wireless LAN router 2a by pairing with the smartphone 1 via the wireless connection 71. After the pairing, the home appliance 4a establishes a wireless connection 72 with the wireless LAN router 2a using the received setting information, and can connect to the internet via the wireless connection 72.

Further, after pairing, since the wireless connection 74 of the smartphone 1 and the wireless connection 72 of the home appliance 4a are connected to the same destination (= the wireless LAN router 2 a), local communication between the smartphone 1 and the home appliance 4a can be performed via the wireless LAN router 2a.

Fig. 2 is a block diagram of a device control system when a plurality of home appliances exist. As the home appliance 4, a home appliance 4b is also present in addition to the home appliance 4a of fig. 1.

The home appliance 4b receives the setting information of the wireless LAN router 2b by pairing with the smartphone 1 via the wireless connection 75. Then, after the pairing, the home appliance 4b establishes a wireless connection 76 with the wireless LAN router 2b using the received setting information.

Thereby, the smartphone 1 can transmit the operation signal to the home appliance 4a via the wireless connection 74 → the wireless LAN router 2a → the wireless connection 72. On the other hand, the smartphone 1 can transmit the operation signal to the home appliance 4b via the wireless connection 73 → the wireless LAN router 2b → the wireless connection 76.

However, in a state where the smartphone 1 is using the wireless connection 74, it is not possible to transmit the operation signal to the home appliance 4b that is not connected to the wireless LAN router 2a. Therefore, the connection target of the smartphone 1 needs to be the wireless LAN router 2 leading to the home appliance 4 to be operated.

Fig. 3 is a detailed configuration diagram of the smartphone 1 and the home appliance 4a of the device control system of fig. 1. The signal flow indicated by the arrows within the smartphone 1 is when paired.

The smartphone 1 includes an application unit 10 and a wireless LAN connection unit 11. The wireless LAN connection unit 11 is connected to the home appliance 4 at the time of pairing. The application unit 10 includes a determination unit 101, a display unit 102, connection information 103, an operation unit 104, and a transmission/reception unit 105.

The connection information 103 is setting data such as an SSID (Service Set Identifier) for connection to the wireless LAN router 2 (see fig. 5 to 7 for details).

The transmitting/receiving unit 105 performs pairing with the home appliance 4 by transmitting the SSID of the connection information 103 to the transmitting/receiving unit 41 of the home appliance 4 and receiving the unique number of the home appliance 4 from the transmitting/receiving unit 41 of the home appliance 4.

In addition, authentication information such as a password (encryption key) for registering the SSID may be required according to the authentication method of the wireless LAN accepted by the wireless LAN router 2. At this time, the smartphone 1 may notify the home appliance 4 including the authentication information in addition to the SSID at the time of pairing.

The home appliance 4 stores the SSID (and the authentication information) received via the transmission/reception unit 41 as the connection information 42, and can thereafter connect to the wireless LAN router 2 using the connection information 42.

The operation unit 104 receives an operation at the time of pairing from the user, instructs the transmission/reception unit 105 to perform pairing, and writes the obtained unique number of the home appliance 4 in the connection information 103.

The determination unit 101 and the display unit 102 will be described below with reference to fig. 4.

Fig. 4 is a configuration diagram showing a signal flow in connection after pairing with the smartphone 1 of fig. 3.

The wireless LAN connection unit 11 changes the connection destination of the smartphone 1 from the paired home appliance 4 in fig. 3 to the wireless LAN router 2.

The determination unit 101 compares the SSID of the wireless LAN router 2 to which the wireless LAN connection unit 11 is connected with the SSID connected to the home appliance 4 stored as the connection information 103 at the time of pairing. By this matching process, the determination unit 101 determines whether or not the wireless LAN connection unit 11 is connected to the wireless LAN router 2 leading to the home appliance 4 of the partner (in other words, an expected wireless LAN or a correct wireless LAN).

The display unit 102 assists the smartphone 1 to be connectable to a desired wireless LAN by displaying the determination result of the determination unit 101 (see fig. 11 for details). The transmission/reception unit 105 can transmit and receive data such as operation signals to and from the transmission/reception unit 41 of the home appliance 4 via a desired wireless LAN. Thereby, the operation unit 104 receives the operation of the home appliance 4 after the pairing from the user.

Fig. 5 is an explanatory diagram showing initial data of the connection information 103. The connection information 103 stores the unique number of the home appliance 4 and the connection information 42 (SSID) of the wireless LAN router 2 to which the home appliance 4 is connected in association with each other. No entry exists in the initial data.

Fig. 6 is an explanatory diagram showing connection information 103 in which entries of the home appliance 4a of fig. 1 are registered with respect to the initial data of fig. 5. In the home appliance 4a, a wireless connection 72 with the wireless LAN router 2a is established. Accordingly, the corresponding data of the unique number (= D001) of the home appliance 4a and the SSID (= R001) of the wireless LAN router 2a are registered in the connection information 103.

Fig. 7 is an explanatory diagram showing connection information 103 in which entries of the home appliance 4b of fig. 2 are also registered with respect to the data of fig. 6. In the home electric appliance 4b, a wireless connection 76 to the wireless LAN router 2b is established. Accordingly, the connection information 103 registers corresponding data of the unique number (= D002) of the home appliance 4b and the SSID (= R002) of the wireless LAN router 2b.

Fig. 8 is a flowchart showing an operation of pairing the application units 10.

In S101, the wireless LAN connection unit 11 is connected to the home appliance 4. In the connection processing in S101, as described with reference to the wireless connection 71 in fig. 1, the smartphone 1 and the home appliance 4 are directly connected without passing through the wireless LAN router 2. Therefore, the user of the smartphone 1 inputs an operation for causing the wireless LAN connection unit 11 to execute the pairing start process of S101 with reference to the instruction manual or the like of the smartphone 1.

In S102, the transmitting/receiving unit 105 transmits the connection information of the wireless LAN to the home appliance 4 in S101. The connection information is used when the home appliance 4 is connected during normal operation.

In S103, the transmission/reception unit 105 receives the unique number from the home appliance 4 as a response to S102.

In S104, the transmission/reception unit 105 is disconnected from the transmission/reception unit 41 of the home appliance 4. After the disconnection, the wireless LAN connection unit 11 automatically connects to any one of the wireless LAN routers 2 that have been connected in the past. In addition, the SSID that has been connected in the past is stored in the smartphone 1 as a history in association with the password.

In S105, the operation unit 104 stores the connection information transmitted to the home appliance 4 in S102 and the unique number received from the home appliance 4 in S103 in association with each other as the connection information 103.

Fig. 9 is a flowchart showing the operation of connection confirmation after the pairing operation of fig. 8.

In S111, the determination unit 101 acquires the SSID of the connection information 103 of the home appliance 4 stored in S105.

In S112, the determination unit 101 acquires the connection information of the current smartphone 1 (wireless LAN connection unit 11). The connection information refers to the SSID of the wireless LAN router 2 that is automatically connected after being disconnected from the home appliance 4 as described in S104.

In S113, the determination unit 101 determines whether or not the SSID at S111 matches the SSID at S112. The two pieces of connection information (SSID) match (S113, yes), and it is indicated that the smartphone 1 can be connected to the wireless LAN router 2a leading to the requested home appliance 4, as in fig. 1, the wireless connection 74 and the wireless connection 72 are connected to the same wireless LAN router 2a.

On the other hand, if the two pieces of connection information do not match (No at S113), the determination unit 101 causes the display unit 102 to display a warning message indicating that the current connection destination of the smartphone 1 is incorrect (S119).

Fig. 10 is a flowchart showing a connection operation when the paired home electric appliance 4 is selected as an operation target from the application unit 10. Hereinafter, the home appliance 4 selected as the operation target is referred to as a "selected product".

The respective processes of S111 to S113 are the same as those shown in fig. 9 for the selected product. That is, since the connection destination of the smartphone 1 is the wireless LAN router 2 including the selected product, the smartphone 1 can be connected to the required wireless LAN router 2.

On the other hand, if no in S113, the smartphone 1 autonomously searches for another connection destination, unlike fig. 9. Next, the processing performed when no in S113 is described.

In S114, the wireless LAN connection unit 11 acquires SSID information from a wireless LAN radio signal around the smartphone 1.

In S115, the determination unit 101 determines whether or not there is an SSID that matches the SSID of the home appliance 4 in S111 from the SSID list of the neighboring wireless LAN acquired in S114. If yes in S115, the process proceeds to S116, otherwise, the process proceeds to S117.

At S116, the display unit 102 presents the connection information of the peripheral wireless LAN matching the SSID of the selected product to the user as a new connection destination advice message.

In S117, the display unit 102 presents a warning message to the user indicating that the indoor operation for selecting a product is not possible.

Fig. 11 is an example of a display screen of each message described in fig. 9 and 10.

Screen example 201 shows a reminder message displayed in S119. In addition to the reminder indicating that the current connection destination is different, the SSID = R001 of the correct connection destination stored in the connection information 103 is also displayed.

Screen example 202 represents the advice message displayed in S116. The peripheral wireless LAN also displays SSID = R001 of the correct connection destination stored in the connection information 103. Further, the wireless LAN connection unit 11 receives a touch of the "connection switch to R001" button from the user via the operation unit 104, and switches the connection to the wireless LAN router 2a having SSID = R001.

Screen example 203 shows the warning message displayed in S117. This makes it possible for the user to know that an accurate connection destination does not exist in the peripheral connectable wireless LAN.

Fig. 12 is a sequence diagram for explaining the operations of fig. 8 to 10 with attention paid to a plurality of devices constituting the plant control system of fig. 1 for easy understanding.

In S211, the transmitting/receiving unit 41 of the home appliance 4a starts the pairing mode by a long press operation of a physical button (pairing button) provided in the home appliance 4a, and the home appliance 4 itself becomes an access point of the wireless LAN. That is, the pairing mode is a preparation for establishing the wireless connection 71 of fig. 1. Therefore, the user of the home appliance 4a inputs a long press operation or the like for setting the home appliance 4a to the pairing mode, with reference to the use instruction or the like of the home appliance 4a.

In S212, the smartphone 1 activates the application unit 10 for pairing with the home appliance 4a by a touch operation of an icon or the like by the user. The application unit 10 transmits a connection request to the home appliance 4a in the pairing mode (S213, S101 and S102 in fig. 8). The connection request includes SSID = R001 of the wireless LAN router 2a to which the home appliance 4a is connected and a Password (PW) thereof.

Then, the home appliance 4a stores the information included in the connection request in S213 as the connection information 42, and transmits the unique number of the home appliance to the smartphone 1 in response to S213 (S214, S103 in fig. 8). The application unit 10 stores the SSID of the connection request at S213 and the unique information at S214 in association with each other as the connection information 103 (S215, S105 in fig. 8).

The home appliance 4a starts the wireless connection 72 with the wireless LAN router 2a based on the connection information 42 (SSID = R001) stored in S213 (S216).

Here, the smartphone 1 disconnects the connection with the household electrical appliance 4a from which the pairing mode is released after the connection response in S214 (S104 in fig. 8). Therefore, the smartphone 1 forms the wireless connection 73 to the wireless LAN router 2b (SSID = R002) connected last time (S221). However, since the wireless LAN router 2b does not accommodate the home appliance 4a, even if the home appliance operation signal is transmitted to the wireless LAN router 2b (S222), the home appliance operation signal is not transmitted to the home appliance 4a (failure in S223).

Therefore, the smartphone 1 acquires the connection information of the current wireless connection 73 (S231, S112 in fig. 9), and causes the display unit 102 to display a warning message that is obtained because the acquired connection information does not match the connection information 103 of the home appliance 4a stored in S215 (S232, S119 in fig. 9).

Thus, the smartphone 1 is connected to the wireless LAN router 2a (SSID = R001) leading to the home appliance 4a by the wireless connection 74 for which the user has specified a correct connection destination (S233). Then, the smartphone 1 can transmit the home appliance operation signal to the home appliance 4a (S234) to the home appliance 4a via the wireless LAN router 2a (S235).

In the present embodiment described above, the SSID transmitted to the home appliance 4 and the SSID automatically connected to the smartphone 1 are compared (S113 in fig. 9), and if they are different, a reminder message is displayed to the user (S119) to present SSID information to which the smartphone 1 must connect when operating the home appliance 4.

In addition, the smartphone 1 stores, in the operation terminal, the unique number of the device to be paired and the SSID of the wireless LAN router set at the time of pairing as associated connection information 103 (S105 in fig. 8). When the user selects the home appliance 4, the smartphone 1 determines whether or not the wireless LAN router to which the currently operating terminal is connected is set for pairing (S113 in fig. 10), and if not, presents the user with a clear understanding (S117).

This makes it easy for the user to know the connection destination of the wireless LAN to which the home appliance 4 needs to be connected when operating.

The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail to explain the present invention easily and understandably, and are not limited to having all the structures described.

Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment.

In addition, other configurations can be added, deleted, and replaced for a part of the configurations of the embodiments. Further, the above-described structures, functions, processing units, and the like may be implemented in part or all of hardware by, for example, designing them on an integrated circuit.

The above-described structures, functions, and the like may be realized by software by a processor interpreting and executing a program for realizing the functions.

Information such as programs, tables, and files for realizing the respective functions can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC (Integrated Circuit) card, an SD card, and a DVD (Digital Versatile Disc).

In addition, the control lines and the information lines are shown to be considered necessary for the description, and not necessarily all the control lines and the information lines on the product are shown. In practice it can also be considered that almost all structures are interconnected.

Description of the reference numerals

1. Intelligent mobile phone (first communication equipment)

2a, 2b Wireless LAN Router (Wireless Router)

4a, 4b household electrical appliances (second communication equipment)

10. Application part

11. Wireless LAN connection part (Wireless communication function part)

41. Transceiver portion (Wireless communication function portion)

42. Connection information

71-76 wireless connection

101. Determination unit

102. Display unit

103. Connection information

104. Operation part

105. A transceiver unit.

Claims

1. A connection router determination method executed in an environment including a first communication apparatus having a wireless communication function section and a display section, a second communication apparatus having a wireless communication function section, and a plurality of wireless routers, characterized by executing:

a step in which a wireless communication functional section of the second communication device maintains a connection with a second connection router that is any one of the plurality of wireless routers;

a step in which a wireless communication functional unit of the first communication device is connected to a first connection router that is any one of the plurality of wireless routers; and

a step in which the display section of the first communication device outputs a warning if the first connection router to which the first communication device is connected is different from the second connection router to which the second communication device is maintained connected,

the first communication device determines whether or not the second connection router is present in a connectable wireless router list acquired from a radio signal of wireless communication in the vicinity of the first communication device in the step of outputting the warning,

outputting, as the warning, a first warning that information about the second connection router is a correct connection target when the second connection router exists in the list,

outputting, as the warning, a second warning that connection cannot be made when the second connection router does not exist in the list.

2. The connection router judgment method according to claim 1, wherein:

in the step of outputting the first warning, a step of outputting, by a display unit of the first communication device, an operation unit of a wireless router for switching the connection destination of the first communication device to a correct connection destination is performed.

3. The connection router judgment method according to claim 1 or 2, characterized by performing:

a step in which the wireless communication functional unit of the first communication device notifies the second communication device of ID information of a wireless router to which the wireless communication functional unit of the second communication device maintains connection, and stores the ID information in the storage unit of the first communication device;

and a step in which, in the step of outputting the warning, the first communication device determines whether or not to output the warning by comparing the ID information stored in the storage unit of the first communication device with the ID information of the wireless router to which the first communication device is connected.

4. An appliance control system including a first communication appliance having a wireless communication function section and a display section, a second communication appliance having a wireless communication function section, and a plurality of wireless routers, characterized in that:

the wireless communication functional section of the second communication device maintains a connection with a second connection router that is any one of the plurality of wireless routers,

the wireless communication functional section of the first communication device is connected to a first connection router which is any one of the plurality of wireless routers,

a step in which the display section of the first communication device outputs a warning when the first connection router to which the first communication device is connected is different from the second connection router to which the second communication device is maintained connected,

the first communication device determining whether or not the second connection router is present in a connectable wireless router list acquired from a radio signal of wireless communication in the vicinity of the first communication device when the warning is output,

outputting a second warning that connection cannot be made as the warning when the second connection router does not exist in the list.