KR102054176B1 - METHOD FOR SETTING WIRELESS LAN OF IoT DEVICE AND APPARATUS THEREOF - Google Patents

Abstract

Disclosed is a method for setting a wireless LAN, which is performed in an IoT device. The method of the present invention comprises the steps of: setting an access point (AP) mode for receiving a Wi-Fi connection request from the outside and outputting a beacon signal; receiving identification information on a user terminal and a probe request from the user terminal to transmit a probe response to the user terminal; performing authentication of the user terminal, based on the identification information; outputting soundwave signals including a service set identifier (SSID) of the IoT device when the authentication is passed; making Wi-Fi connection with the user terminal when the Wi-Fi connection request is received from the user terminal; receiving the SSID and password information from the user terminal; changing the AP mode into a client mode where a Wi-Fi connection request is transmitted to the target Wi-Fi; and making Wi-Fi connection with the target Wi-Fi by using the SSID and the password of the target Wi-Fi. The present invention can connect an IoT device to a target Wi-Fi.

Description

Wireless LAN setting method and IoT device of IoT device {METHOD FOR SETTING WIRELESS LAN OF IoT DEVICE AND APPARATUS THEREOF}

Disclosed are a method for setting a WLAN of an IoT device and a device thereof.

IoT devices other than devices having a display unit, such as a smartphone or a tablet PC, are difficult to enter the SSID and password of the Wifi when the wireless LAN is connected, and thus the wireless LAN may be connected to any Wifi. There is a need for a method of configuring a WLAN for connecting an IoT device to a target Wifi.

Provides a method of setting a WLAN to connect an IoT device with a target Wifi.

The wireless LAN setting method performed in the IoT device may include setting an access point (AP) mode for receiving a Wifi connection request from the outside and outputting a beacon signal, identification information and probe of the user terminal from the user terminal Receiving a request (Probe Request), Transmitting a probe response to the user terminal, Performing authentication for the user terminal based on the identification information, If the authentication is successful, SSID of the IoT device ( Outputting a sound wave signal including Service Set Identifier, if a Wifi connection request is received from the user terminal, connecting to the Wifi with the user terminal, and receiving SSID and password information of the target Wifi from the user terminal. Switching the AP mode to a client mode and transmitting a Wifi connection request to the target Wifi; and And connecting the Wi-Fi to the target Wifi using the SSID and the password of the target Wifi, wherein the Wifi connection request is determined by the user terminal based on a sound wave band of the sound wave signal to determine the validity of the sound wave signal. If it is determined that the sound wave signal is valid, it is based on the SSID of the IoT device extracted from the sound wave signal.

The outputting of the beacon signal may include determining whether a device connected to the IoT device is Wifi, and if the device is not Wifi, setting the AP mode and outputting the beacon signal.

The IoT device includes a memory in which a control program is recorded, a processor operating according to the control program, and a communication interface for transmitting and receiving SSID and password information to and from a user terminal, wherein the control program includes an AP that receives a Wifi connection request from the outside. Setting an access point mode and outputting a beacon signal, receiving identification information and a probe request of the user terminal from a user terminal; Transmitting a probe response to the user terminal, and authenticating the user terminal based on the identification information; Outputting a sound wave signal including a service set identifier (SSID) of the IoT device when the authentication is successful; connecting a Wifi connection to the user terminal when a Wifi connection request is received from the user terminal; Receiving the SSID and password information of the target Wifi from the device, switching the AP mode to the client mode, transmitting a Wifi connection request to the target Wifi, and using the SSID and password of the target Wifi with the target Wifi; Performing a Wifi connection, and the Wifi connection request is determined by the user terminal based on the sound wave band of the sound wave signal, and when it is determined that the sound wave signal is valid, from the sound wave signal It is based on the SSID of the extracted IoT device.

The outputting of the beacon signal may include determining whether a device connected to the IoT device is Wifi, and if the device is not Wifi, setting the AP mode and outputting the beacon signal. .

In the WLAN setting method performed in the user terminal, the user terminal, receiving the beacon signal output from the IoT device is set AP mode, transmitting the identification information and the probe request of the user terminal to the IoT device Receiving a probe response from the IoT device; Activating a microphone unit provided in the user terminal; Receiving a sound wave signal output from the IoT device through the microphone unit, determining the validity of the sound wave signal based on the sound wave band of the sound wave signal, and when the sound wave signal is determined to be valid, from the sound wave signal Extracting SSID and password information for a target Wifi, transmitting a Wifi connection request to an IoT device based on the SSID, and transmitting the SSID and password information to the IoT device; The sound wave signal is output when the authentication performed on the user terminal is successful based on the identification information, and the IoT device receives the SS mode and the password information from the user terminal. Change and connect the Wifi to the target Wifi using the SSID and password information.

The IoT device may determine whether a device connected to the IoT device is Wifi, and if the device connected to Wifi does not exist, set the AP mode and output the beacon signal.

The IoT device can be connected to the target Wifi.

1 is a schematic diagram of an IoT device connected to Wifi according to an embodiment.
2 illustrates Wifi information of an IoT device according to an embodiment.
3 is a flowchart illustrating a WLAN setting method according to an embodiment.
4A to 4E illustrate each step of a WLAN setting method according to an embodiment.
5 is a flowchart illustrating a WLAN setting method according to an embodiment.
6 illustrates an IoT device according to an embodiment.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, various changes may be made to the embodiments so that the scope of the patent application is not limited or limited by these embodiments. It is to be understood that all changes, equivalents, and substitutes for the embodiments are included in the scope of rights.

The terminology used herein is for the purpose of description and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In addition, in the description with reference to the accompanying drawings, the same components regardless of reference numerals will be given the same reference numerals and duplicate description thereof will be omitted. In the following description of the embodiment, when it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

1 is a schematic diagram of an IoT device 100 connected to Wifi according to an embodiment.

The IoT device 100 refers to a device that transmits and receives data with another device in real time through an attached sensor. The IoT device may be one of various devices such as a refrigerator, a stand, a rice cooker, an IPTV, a door lock, a power strip, a gas meter, a coffee pot, a dishwasher, a fan, an air conditioner, a boiler, and a vacuum cleaner, which can connect to a wireless network.

In order to transmit / receive data with another device, the IoT device 100 requires a wireless Internet connection such as Wifi. Under the usage environment of the conventional IoT device 100, there are many cases in which two or more Wifis (ie, Access Points) exist around the IoT device 100. FIG. 1 illustrates an IoT device 100 and three Wifis existing around the IoT device 100 (Wifi having an SSID of “A”, “B”, and “C”, respectively).

As such, when two or more Wifis exist in the vicinity of the IoT device 100, the user may select a specific Wifi device (hereinafter, the target Wifi 300) among the two or more Wifis due to the strength of the Wifi signal or the content cost. You may want to connect to

For example, the user may try to connect the IoT device 100 to the target Wifi 300 (eg, Wifi “C” in FIG. 1) having the highest Wifi signal strength.

Alternatively, the IoT device 100 may receive (or receive free) necessary data such as update data from the target Wifi 300 only when the IoT device 100 is connected to a specific target Wifi 300, or the necessary data may be free ( Or low cost), the user may try to connect the IoT device 100 to the specific target Wifi 300 in consideration of the cost.

However, in the case of the IoT device 100 which does not include an input unit for user input for numbers or letters and a display unit for visually outputting information related to Wifi connection, such as a smartphone, a laptop or a tablet PC, the IoT device 100 It is difficult for a user to set a desired Wifi connection with the target Wifi 300. In this case, the IoT device 100 may first be connected to a device such as a smartphone that is easily inputted by a user, and then may be controlled to which IoT device 100 to connect to the IoT device 100 through the device. have.

2 illustrates Wifi information of the IoT device 100 according to an embodiment.

Referring to FIG. 1 along with FIG. 1, a plurality of IoT devices 100 capable of Wifi connection with the user terminal 200 may exist. Referring to FIG. 2, IoT devices connectable to the user terminal 200 include "wrdevent", "amherst05G", "iptime", "KOCCA-10F-1", "KOCCA-5G 10F-11", and "KOCCA-5G". 11F-11 "may be one of the devices having an SSID. As such, when there are a plurality of IoT devices capable of connecting to the user terminal 200 and Wifi, it is difficult for the user to determine what the SSID of the IoT device 100 is to be controlled.

At this time, if the user terminal 200 receiving the beacon signal from the IoT device 100 transmits the identification information and the probe request to the IoT device 100, the IoT device 100 sends a probe response to the user terminal 200. And authenticates the user terminal based on the identification information. As a result, when the authentication is successful, the IoT device 100 outputs a sound wave signal including the SSID of the IoT device 100 itself, and the user terminal 200 is based on the sound wave band of the sound wave signal. Determine the validity of the sound wave signal, and if the sound wave signal is valid, extract the SSID corresponding to the IoT device 100 from the sound wave signal, and use the SSID to connect to the IoT device 100 by Wifi. .

Since at least one smartphone or tablet PC is often held in each home, the Wifi connection to the IoT device 100 is controlled by controlling the Wifi connection of the IoT device 100 using the user terminal 200. The IoT device 100 may be controlled to be connected to a target Wifi desired by a user without further providing a display for additional input or a Wifi connection information output. Therefore, the manufacturing process of the IoT device 100 can be simplified, and the manufacturing cost can be reduced.

3 is a flowchart illustrating a WLAN setting method according to an embodiment.

Referring to FIG. 3, the IoT device 100 sets an access point (AP) mode for receiving a Wifi connection request from the outside and outputs a beacon signal (S100).

Beacon signals may use standard Wifi beacons used in conventional Wifi devices.

4A illustrates each step of a WLAN setting method according to an embodiment.

Referring to FIG. 4A together with FIG. 3, when the user terminal 200 receives a beacon signal from the IoT device 100, the user terminal 200 may perform an AP search.

Referring back to FIG. 3, the IoT device 100 receives identification information and a probe request of the user terminal 200 from the user terminal 200 (S110).

3, the IoT device 100 transmits a probe response to the user terminal 200 (S120).

The probe request means a signal for checking whether a specific AP exists within a predetermined range. Although not shown, when the IoT device 100 operating in the AP mode receives a probe request from an external device (here, the user terminal 200), the IoT device 100 transmits a probe response to the external device. You can reply by sending.

Subsequently, referring to FIG. 3, the IoT device 100 performs authentication on the user terminal 200 based on the identification information (S130).

The identification information may include a unique number of the user terminal 200, a MAC (Media Access Control) address, or a code for a specific app. The IoT device 100 may perform authentication based on whether the identification information corresponds to the reference information. The reference information may be stored in the IoT device 100 or a separate external server. Through this configuration, the control authority of the IoT device 100 may be granted only to a specific user terminal 200.

3, the IoT device 100 outputs a sound wave signal when authentication is successful (S140).

The sound wave signal includes the SSID of the IoT device 100. The SSID is used for Wifi connection between the IoT device 100 and the user terminal 200.

4B illustrates each step of a WLAN setting method according to an embodiment.

Referring to FIG. 4B together with FIG. 3, the IoT device 100 may output a sound wave signal including the SSID of the IoT device 100 (eg, “refreg # 1”, which is its SSID). The sound wave signal may be an audible or inaudible band signal. If the IoT device 100 is set to always output a sound wave signal, the power consumption of the IoT device 100 may increase, and if the sound wave signal is a signal of the audible band, the noise that the user does not want to continue to generate a sound wave signal Can work. In contrast, the IoT device 100 outputs a sound wave signal only when a probe request is received from the user terminal 200, thereby reducing power consumption of the IoT device 100 and preventing occurrence of unnecessary noise.

The IoT device 100 generates source data including the SSID of the IoT device 100.

The position of the first frequency post (ie, the first frequency of the frequency bands used) used for sound wave communication may be set differently for each IoT device 100.

In addition, the frequency band used for sound wave communication may be set differently for each IoT device 100.

In addition, a sound wave protocol used for sound wave communication may be set differently for each IoT device 100.

The user terminal 200 may obtain a bit value before processing by decoding the sound wave signal received from the IoT device 100. The user terminal 200 may hold a shuffle array corresponding to the shuffle array held by the IoT device 100 and post array information corresponding to the frequency posts corresponding to the number of bits for decoding.

Referring back to FIG. 3, the IoT device 100 receives a Wifi connection request from the user terminal 200 (S150).

Although not shown, the user terminal 200 receiving the sound wave signal determines the validity of the sound wave signal based on the sound wave band of the sound wave signal, and when it is determined that the sound wave signal is valid, the Wifi connection request is IoT. May transmit to the device 100. That is, the user terminal 200 may transmit a Wifi connection request to the IoT device 100 only when it is determined that the received sound wave signal is valid. By adopting such a configuration, even when a plurality of sound wave signals are received and noise occurs, the IoT device 100 that outputs a specific sound wave signal may be targeted and controlled.

3, the IoT device 100 connects the Wifi to the user terminal 200 that has transmitted the Wifi connection request (S160).

4C illustrates each step of a WLAN setting method according to an embodiment. Referring to FIG. 4C, it can be seen that the IoT device 100 is connected to the user terminal 200 via Wifi.

Referring back to FIG. 3, the IoT device 100 receives the SSID and password information of the target Wifi 300 from the Wifi connected user terminal 200 (S170).

The target Wifi 300 refers to Wifi that the user wants to connect to the IoT device 100 via Wifi.

Referring to FIG. 4C together with FIG. 3, the IoT device 100 may transmit the SSID “C” and the password information “doubleY0809” of the target Wifi 300 from the user terminal 200 to the Wifi-connected IoT device 100. .

Referring back to FIG. 3, the IoT device 100 switches the AP mode to a client mode that transmits a Wifi connection request to the target Wifi 300 (S180).

4D illustrates each step of a WLAN setting method according to an embodiment.

4C and 4D together with FIG. 3, after receiving the SSID and password information from the user terminal 200, the IoT device 100 releases the Wifi connection with the user terminal 200 and sets the client to the AP mode. Switch to the mode, and transmit the Wifi connection request and password information to the target Wifi 300 (WiFi C having an SSID here "C").

Referring back to FIG. 3, the IoT device 100 connects Wifi to the target Wifi 300 using the SSID and password of the target Wifi 300 (S170).

4E illustrates each step of a WLAN setting method according to an embodiment.

Referring to FIG. 4E together with FIG. 3, the IoT device 100 switched to the client mode may be connected to Wifi C, which is the target Wifi 300.

5 is a flowchart illustrating a WLAN setting method according to an embodiment.

Referring to FIG. 5, the user terminal 200 receives a beacon signal from the IoT device 100 in which the AP mode is set (S200).

When the beacon signal is received from the IoT device 100, the user terminal 200 performs an AP search.

Referring to FIG. 5, the user terminal 200 transmits identification information and a probe request of the user terminal 200 to the IoT device 100 (S210).

5, the user terminal 200 transmits a probe response to the IoT device 100 (S220).

When the IoT device 100 operating in the AP mode receives a probe request from an external device (here, the user terminal 200), the IoT device 100 may transmit a probe response to the external device and respond.

5, the user terminal 200 activates the microphone unit provided after the probe response is received.

5, the user terminal 200 receives a sound wave signal including the SSID of the IoT device 100 from the IoT device 100 through the microphone unit (S240).

The sound wave signal includes the SSID of the IoT device 100. The SSID is used for Wifi connection between the IoT device 100 and the user terminal 200.

In one example, the IoT device 100 may output an audible or inaudible sound wave signal including the SSID of the IoT device 100 (eg, "stand # 2", which is its SSID). As such, the IoT device 100 may output the sound wave signal after receiving the probe request, thereby significantly reducing the power consumption of the IoT device 100 as compared to the case in which the IoT device 100 is always configured to output the sound wave signal.

In addition, the IoT device 100 performs authentication on the user terminal 200 based on the identification information. The identification information may be a unique number, a media access control (MAC) address, or a specific app of the user terminal 200. App) code, and the like. The IoT device 100 may perform authentication based on whether the identification information corresponds to the reference information. The reference information may be stored in the IoT device 100 or a separate external server. Through this configuration, the control authority of the IoT device 100 may be granted only to a specific user terminal 200.

5, the user terminal 200 determines the validity of the sound wave signal based on the sound wave band of the sound wave signal (S250).

If the user terminal 200 determines the validity of the sound wave signal based on the sound wave band of the sound wave signal, and determines that the sound wave signal is valid, the user terminal 200 may transmit the Wifi connection request to the IoT device 100. That is, the user terminal 200 may transmit a Wifi connection request to the IoT device 100 only when it is determined that the received sound wave signal is valid. By adopting such a configuration, even when a plurality of sound wave signals are received and noise occurs, the IoT device 100 that outputs a specific sound wave signal can be accurately targeted and controlled.

5, if it is determined that the sound wave signal is valid, the user terminal 200 extracts the SSID of the IoT device from the sound wave signal (S260).

5, the user terminal 200 transmits a Wifi connection request to the IoT device 100 based on the SSID (S270).

In detail, the user terminal 200 may further transmit a Wifi connection request including an authentication request and a connection request to the IoT device 100. The IoT device 100 may be Wifi-connected with the user terminal 200 where the Wifi connection request is received.

Referring to FIG. 5, the user terminal 200 transmits the SSID and password information of the target Wifi 300 to the IoT device 100 (S280).

The user terminal 200 may transmit the SSID “A” and the password information “kj850323” of the target Wifi 300 to the Wifi-connected IoT device 100. When the SSID and the password for the target Wifi are received from the user terminal 200, the IoT device 100 releases the Wifi connection with the user terminal 200 and transmits a Wifi request to an external device in the AP mode. You can switch to the mode. The IoT device 100 set to the client mode may request the Wifi connection by transmitting the SSID “A” and the password information “kj850323” received from the user terminal 200 to the target Wifi 300 having the SSID “A”.

6 illustrates an IoT device 100 according to one embodiment.

Referring to FIG. 6, the IoT device 100 includes a memory in which a control program is recorded, a processor operating according to the control program, and a communication interface for transmitting and receiving SSID and password information with the user terminal 200. The control program is set to an access point (AP) mode for receiving a Wifi connection request from the outside, and outputting a beacon signal, the identification information and probe request of the user terminal 200 from the user terminal 200. Receiving a Probe Request; Transmitting a probe response to the user terminal 200, performing authentication on the user terminal 200 based on the identification information, and if authentication succeeds, the SSID (Service Set Identifier) of the IoT device 100 is determined. Outputting a sound wave signal that includes a signal; when a Wifi connection request is received from the user terminal 200, connecting to the user terminal 200 by Wifi; an SSID of a target Wifi 300 from the user terminal 200 And receiving the password information, switching the AP mode to the client mode, transmitting a Wifi connection request to the target Wifi 300, and using the SSID and password of the target Wifi 300. 300) and the Wifi connection request, as a result of the user terminal 200 determining the validity of the sound wave signal based on the sound wave band of the sound wave signal, If it is determined that the call is valid, it is based on the SSID of the IoT device extracted from the sound wave signal.

The outputting of the beacon signal may include determining whether a device connected to the IoT apparatus 100 is Wifi, and when there is no device connected to Wifi, setting an AP mode and outputting the beacon signal.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and configure the processing device to operate as desired, or process it independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. Or may be permanently or temporarily embodied in a signal wave to be transmitted. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. Software and data may be stored on one or more computer readable recording media.

Although the embodiments have been described with reference to the accompanying drawings, those skilled in the art may apply various technical modifications and variations based on the above. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different manner than the described method, or other components. Or even if replaced or replaced by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the following claims.

100: IoT device
110: memory
120: processor
130: communication interface
200: user terminal
300: target Wifi

Claims (7)

In the WLAN setting method performed in the IoT device,
Setting to an AP mode and outputting a beacon signal;
Receiving identification information and a probe request of the user terminal from a user terminal;
Transmitting a probe response to the user terminal;
Performing authentication on the user terminal based on the identification information;
Outputting a sound wave signal including a service set identifier (SSID) of the IoT device when the authentication is successful;
If a Wifi connection request is received from the user terminal, connecting to the user terminal with Wifi;
Receiving SSID and password information of a target Wifi from the user terminal;
Switching to the client mode from the AP mode and transmitting a Wifi connection request to the target Wifi; And
Connecting Wifi to the target Wifi using the SSID and password of the target Wifi
Including,
The probe request is related to an activation time point of sound wave communication based on the sound wave signal,
The user terminal determines the validity of the sound wave signal based on the sound wave band of the sound wave signal, and if it is determined that the sound wave signal is valid, to the IoT device corresponding to the SSID extracted from the sound wave signal among the scanned SSIDs. To send the Wifi connection request,
How to set up WLAN. The method of claim 1,
The step of outputting the beacon signal,
Determining whether there is a Wifi-connected device and the Wi-Fi-connected device, setting the AP mode and outputting the beacon signal when there is no Wifi-connected device
Including,
How to set up WLAN. In the IoT device,
A memory in which a control program is recorded;
A processor operating according to the control program; And
Communication interface for transmitting and receiving SSID and password information with the user terminal
Including,
The control program,
Setting to an AP mode and outputting a beacon signal;
Receiving identification information and a probe request of the user terminal from a user terminal;
Transmitting a probe response to the user terminal;
Performing authentication on the user terminal based on the identification information;
Outputting a sound wave signal including an SSID (Service Set Identifier) of the IoT device when the authentication is successful;
If a Wifi connection request is received from the user terminal, connecting to the user terminal with Wifi;
Receiving SSID and password information of a target Wifi from the user terminal;
Switching to the client mode from the AP mode and transmitting a Wifi connection request to the target Wifi; And
Connecting Wifi to the target Wifi using the SSID and password of the target Wifi
Then,
The probe request is related to an activation time point of sound wave communication based on the sound wave signal,
The user terminal determines the validity of the sound wave signal based on the sound wave band of the sound wave signal, and if it is determined that the sound wave signal is valid, to the IoT device corresponding to the SSID extracted from the sound wave signal among the scanned SSIDs. To send the Wifi connection request,
IoT devices. The method of claim 3,
The step of outputting the beacon signal,
Determining whether there is a Wifi-connected device and the Wi-Fi-connected device, setting the AP mode and outputting the beacon signal when there is no Wifi-connected device
Including,
IoT devices. In the WLAN setting method performed in the user terminal,
Receiving a beacon signal output from an IoT device having an AP mode set;
Transmitting identification information and a probe request of the user terminal to the IoT device;
Receiving a probe response from the IoT device;
Activating a microphone unit provided in the user terminal;
Receiving a sound wave signal including an SSID of the IoT device output from the IoT device through the microphone unit;
Determining the validity of the sound wave signal based on the sound wave band of the sound wave signal;
If it is determined that the sound wave signal is valid, transmitting a Wifi connection request to the IoT device corresponding to the SSID extracted from the sound wave signal among the scanned SSIDs; And
Transmitting SSID and password information of a target Wifi to the IoT device;
Including,
The probe request is related to an activation time point of sound wave communication based on the sound wave signal,
The sound wave signal is output when the authentication performed on the user terminal based on the identification information is successful,
When the SSID and password information are received from the user terminal, the IoT device changes the client mode to the AP mode and is connected to the target Wifi using the SSID and password information.
How to set up WLAN. The method of claim 5,
The IoT device determines whether a device connected to the IoT device is Wifi, and if the device connected to Wifi does not exist, sets the AP mode and outputs the beacon signal.
Wireless LAN Setting Method A computer-readable recording medium having recorded thereon a control program for performing the method of claim 1.

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