A handheld laser scanning device network configuration method, device, equipment and medium
Patent Information
- Application Number
- CN202211192074.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-28
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2042-09-28
AI Technical Summary
[0003]手持激光扫描设备中的雷达模块与主板芯片通过有线网卡组成局域网,然后进行通信和收发数据,同时,手持激光扫描设备还需要用到无线网卡进行无线上网,使用过程中,无线网卡的网关地址与有线网卡的网关地址若相同,则会出现主板芯片和雷达模块无法通信的情况
[0027]本说明书实施例可以在复杂的网络场景下,动态配置手持激光扫描设备有线网卡和雷达模块的网络信息,保证手持激光扫描设备在无线开启和关闭的状态下均能够保证手持激光扫描设备的主板芯片正常与雷达模块通信。
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Figure CN117792887B_ABST
Abstract
Description
Technical Field
[0001] This specification relates to the field of computer technology, and in particular to a network configuration method, apparatus, device and medium for a handheld laser scanning device. Background Technology
[0002] LiDAR is a scanning sensor that uses non-contact laser ranging technology. It forms point clouds and acquires data by emitting laser beams and collecting the reflected beams. After processing, it can generate accurate three-dimensional images and accurately acquire physical space environment information. To facilitate the mapping of special space environments, handheld laser scanning devices are usually used.
[0003] In handheld laser scanning devices, the radar module and motherboard chip form a local area network via a wired network card to communicate and send / receive data. At the same time, the handheld laser scanning device also needs a wireless network card for wireless internet access. During use, if the gateway address of the wireless network card is the same as that of the wired network card, the motherboard chip and radar module will be unable to communicate.
[0004] Therefore, a more efficient network configuration method for handheld laser scanning devices is needed to avoid situations where the motherboard chip and radar module cannot communicate. Summary of the Invention
[0005] This specification provides one or more embodiments of a network configuration method, apparatus, device, and medium for a handheld laser scanning device, which addresses the technical problems raised in the background art.
[0006] One or more embodiments of this specification employ the following technical solutions:
[0007] This specification provides one or more embodiments of a network configuration method for a handheld laser scanning device. The handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is sent to the motherboard chip for processing. The method includes:
[0008] Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance.
[0009] When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card;
[0010] If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then perform network configuration using the compliant gateway address.
[0011] This specification provides one or more embodiments of a network configuration device for a handheld laser scanning device. The handheld laser scanning device integrates a wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is transmitted to the motherboard chip for processing. The device includes:
[0012] The first gateway configuration unit, upon determining that the wireless network card is in a turned-off state, configures the wired network card using the historical gateway configuration records of the wired network card obtained in advance;
[0013] When the gateway detection unit determines that the wireless network card is in the enabled state, it detects whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card.
[0014] If the two gateway configuration units are the same, they reconfigure the gateway address of the wired network card to obtain a gateway address that meets the requirements but is different from the gateway address of the wireless network card, and then perform network configuration using the gateway address that meets the requirements.
[0015] This specification provides one or more embodiments of a network configuration device for a handheld laser scanning device. The handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is sent to the motherboard chip for processing, including:
[0016] At least one processor; and,
[0017] A memory communicatively connected to the at least one processor; wherein,
[0018] The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to:
[0019] Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance.
[0020] When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card;
[0021] If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then perform network configuration using the compliant gateway address.
[0022] This specification provides one or more embodiments of a non-volatile computer storage medium. The handheld laser scanning device integrates a wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is transmitted to the motherboard chip for processing. The device stores computer-executable instructions, which are configured as follows:
[0023] Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance.
[0024] When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card;
[0025] If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then perform network configuration using the compliant gateway address.
[0026] The above-described at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:
[0027] The embodiments in this specification can dynamically configure the network information of the wired network card and radar module of the handheld laser scanning device in complex network scenarios, ensuring that the motherboard chip of the handheld laser scanning device can communicate normally with the radar module whether the wireless is on or off. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0029] Figure 1 A flowchart illustrating a network configuration method for a handheld laser scanning device provided for one or more embodiments of this specification;
[0030] Figure 2A schematic diagram illustrating the workflow of a handheld laser scanning device for acquiring radar data, provided in one or more embodiments of this specification.
[0031] Figure 3 This is a schematic diagram of a dynamic configuration network process provided for one or more embodiments of this specification;
[0032] Figure 4 A schematic diagram of a network configuration device for a handheld laser scanning device provided for one or more embodiments of this specification;
[0033] Figure 5 This specification provides a network configuration device for a handheld laser scanning device, as described in one or more embodiments. Detailed Implementation
[0034] This specification provides a method, apparatus, device, and medium for configuring a network for a handheld laser scanning device.
[0035] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0036] Figure 1 This diagram illustrates a process for configuring a network for a handheld laser scanning device according to one or more embodiments of this specification. This process can be executed by a handheld laser scanning device network configuration system. Certain input parameters or intermediate results in the process can be manually adjusted to help improve accuracy.
[0037] It should be noted that the handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network through the wired network card. In the local area network, the radar data collected by the radar module is sent to the motherboard chip for processing.
[0038] The method flow steps of the embodiments in this specification are as follows:
[0039] S102, after determining that the wireless network card is in a turned-off state, the wired network card is configured with a gateway by using the historical gateway configuration records of the wired network card obtained in advance.
[0040] In the embodiments described in this specification, if the wireless network card is in a powered-off state, even if the gateway address of the wireless network card is the same as the gateway address of the wired network card, the motherboard chip and the radar module will not be unable to communicate. Therefore, when it is determined that the wireless network card is in a powered-off state, the gateway address in the historical gateway configuration record can be used when configuring the gateway of the wired network card, or another gateway address can be used.
[0041] S104, when it is determined that the wireless network card is in the enabled state, it is detected whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card.
[0042] S106, if they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and perform network configuration through the compliant gateway address.
[0043] In the embodiments described in this specification, the qualified gateway address is different from the gateway address of the wireless network card and meets the network configuration requirements. When configuring the network using the qualified gateway address, a communication connection can first be established using the gateway address in the historical gateway configuration record of the wired network card, and a network configuration command containing the qualified gateway address can be sent to the radar module; after receiving feedback from the radar module that the gateway address of the wired network card has been successfully changed, the network card address of the wired network card is changed to the qualified gateway address.
[0044] It should be noted that, in order to ensure normal communication between the radar module and the motherboard chip, the wireless network card can be turned off before configuring the network through the qualified gateway address to prevent the gateway address of the wireless network card from conflicting with that of the wired network card, which would affect the normal communication between the radar module and the motherboard chip. After configuring the network through the qualified gateway address, the wireless network card should be turned on.
[0045] Furthermore, based on the characteristics of the radar module, in this embodiment of the specification, after receiving feedback from the radar module that the gateway address of the wired network card has been successfully changed, the radar module can be restarted so that the qualified gateway address takes effect in the radar module.
[0046] Furthermore, if the wired network card does not have a historical gateway configuration record, this embodiment of the specification can obtain the initial network information of the radar module and configure the gateway of the wired network card according to the initial network information of the radar module after determining that the wireless network card is in a turned-off state.
[0047] Furthermore, before configuring the gateway of the wired network card using the historical gateway configuration record of the wired network card obtained in advance, the historical gateway configuration record of the wired network card can be obtained through the identifier of the wired network card.
[0048] It should be noted that the handheld laser scanning device integrates scanning, processing, and display. Through a well-designed structure, it combines a laser scanning device (radar module) with a smart device featuring a display screen. The laser scanning device's network interface connects to the host chip via a network cable. The handheld laser scanning device includes a wireless network card, enabling wireless internet access. The point cloud acquisition application on the motherboard chip (running on the smart device's system) establishes a point-to-point local area network with the laser scanning device (radar module) via a wired network card, and then communicates and sends / receives data via UDP (User Datagram Protocol). In actual experiments, it was found that when the handheld laser scanning device's Wi-Fi (wireless module) is enabled, if the gateway address of the laser scanning device and the Wi-Fi gateway address are the same, the acquisition application on the motherboard chip will be unable to communicate properly with the laser scanning device.
[0049] The process for establishing a communication connection between the device (the host device in the motherboard chip) that needs to receive radar data and the radar module is described below:
[0050] 1. When the radar module is powered on, it broadcasts device information data to a specific port on the local area network through a specific port.
[0051] 2. After receiving the broadcast data, the host device sends a data request to a specific port of the radar module. The request data includes the source port.
[0052] 3. After receiving the connection request, the radar module replies with ACK data to this source port.
[0053] 4. Once the listening device receives the ACK data, the handshake is complete. It can then begin sending heartbeats to maintain the connection and transmit commands and data.
[0054] The reason for the aforementioned inability to communicate normally is that during the initialization process, the LIDAR SDK of the host chip in the handheld laser scanning device will prioritize the network card with the same gateway address as the radar module to listen to the broadcasts emitted by the radar module.
[0055] In the handheld laser scanning device mentioned in the embodiments of this specification, the Wi-Fi network has a higher priority than the wired network card. This is because the network cable from the wired network card on the chip connects to the radar module's network port, not a normal router LAN port. This is to ensure that the radar module and the motherboard chip can communicate via a wired local area network (LAN). Although the motherboard chip's wired network card also needs a gateway address configured before radar acquisition begins, after configuration, it only allows communication with the radar and has no function to connect to other networks. Therefore, it is impossible to set the wired network card's priority higher than Wi-Fi. When the gateway addresses of Wi-Fi and the wired network card are the same, the initialization process will almost always choose the Wi-Fi IP address for initialization. Since the router connected to Wi-Fi and the motherboard chip of the handheld laser scanning device are not on a local area network, the result is that the motherboard chip and the radar module cannot communicate.
[0056] It should be noted that, as described above, the data collection application can function normally if the gateway addresses of the Wi-Fi and radar modules are different. It is impractical to require users to manually select a new Wi-Fi network with a different gateway address or modify the router's gateway address, as the learning curve is too steep and the process is extremely inflexible. Furthermore, simply disabling the Wi-Fi does not solve the problem, because the collected information is not only used locally but also requires real-time communication with the backend in certain scenarios.
[0057] The embodiment of this specification proposes to dynamically reconfigure the gateway address of the wired network card of the radar module and the motherboard chip based on the gateway address of the wireless network card of the handheld laser scanning device, which effectively solves the above-mentioned problem.
[0058] See the schematic diagram of the workflow for acquiring radar data using a handheld laser scanning device. Figure 2 The details are as follows:
[0059] 1) Power on the wired network card in the handheld laser scanning device and configure the gateway address (the gateway address should be consistent with the default gateway of the radar module);
[0060] 2) Power on the radar module (the radar module's network configuration uses the factory default settings, and the gateway is 192.168.1.1 by default);
[0061] 3) Initialize the host LiDAR SDK for the motherboard chipset;
[0062] 4) Wait for the host device on the motherboard chip to successfully establish communication with the radar module;
[0063] 5) Collect data;
[0064] 6) The data acquisition application running on the motherboard chip continuously receives and processes radar data;
[0065] 7) End the data collection.
[0066] Among them, the host Lidar SDK of the motherboard chip can be the part that needs to be integrated into the application that communicates with the radar module and runs on the Android system; the host device of the motherboard chip can be a device running the Android system.
[0067] For the workflow of dynamically configuring the network, please refer to [link / reference]. Figure 3 The diagram illustrating the dynamic network configuration process is as follows:
[0068] Before data collection, first check if the handheld laser scanner's Wi-Fi is enabled. If Wi-Fi is not enabled, when configuring the local wired network card, use the historical configuration record (if it has never been dynamically configured, use the factory default settings as the historical record) to configure the handheld laser scanner's network card. (Note: The historical configuration record can be stored in the local system or the background system, and can be obtained through the network and device ID; this part will not be explained in detail.)
[0069] If Wi-Fi is enabled, it is necessary to check whether the Wi-Fi gateway address is the same as the historical configuration address. If so, the dynamic configuration process needs to be initiated.
[0070] 1) Turn off WIFI: Since the radar's network configuration must be configured when the host system can communicate with it normally, if a conflict is detected between WIFI and the historical configuration record (i.e., the gateway address is the same), then WIFI must be turned off first in order to configure it successfully.
[0071] 2) Configure the wired network card and start the radar according to the historical configuration records;
[0072] 3) After successfully connecting via the gateway address in the historical configuration record, immediately send a network configuration command carrying the new network configuration information to the radar module and wait for its execution result to return. If it does not return for a long time or the return fails, retry.
[0073] The new network configuration information is calculated based on the Wi-Fi gateway address. For example, if the Wi-Fi gateway address is 192.168.1.1, the gateway for the new network configuration information can be set to 192.168.2.1, 192.168.3.1, etc., as long as it is different from the Wi-Fi gateway address.
[0074] 4) After receiving a notification that the radar module has successfully executed the network configuration command, restart the radar module (after restarting, the radar network will be newly configured), and at the same time reset the wired network card of the handheld laser scanning device with the new network information, and wait for the communication connection to be re-established;
[0075] 5) Turn on the local wired network connection from the off state (since WIFI was on before dynamic configuration, to maintain consistency, the data acquisition program will turn on WIFI after configuration).
[0076] 6) After successful communication, the normal workflow will begin.
[0077] After the above dynamic configuration, the data collection process can proceed normally without user intervention. Upon the next startup, if the user's Wi-Fi connection remains unchanged (most users' network environments remain the same for extended periods), it will directly enter the normal workflow without reconfiguration or disabling Wi-Fi. If the Wi-Fi environment changes, the dynamic configuration process will be repeated to ensure stable device operation.
[0078] The embodiments in this specification can dynamically configure the network information of the wired network card and radar module of the handheld laser scanning device in complex network scenarios, ensuring that the motherboard chip of the handheld laser scanning device can communicate normally with the radar module whether the wireless is on or off.
[0079] Figure 4 This is a schematic diagram of a network configuration device for a handheld laser scanning device provided in one or more embodiments of this specification. The handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network through the wired network card. In the local area network, the radar data collected by the radar module is sent to the motherboard chip for processing. The device includes: a first gateway configuration unit 402, a gateway detection unit 404, and a second gateway configuration unit 406.
[0080] The first gateway configuration unit 402, upon determining that the wireless network card is in a turned-off state, configures the wired network card using the historical gateway configuration records of the wired network card obtained in advance;
[0081] When the gateway detection unit 404 determines that the wireless network card is in the enabled state, it detects whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card.
[0082] The second gateway configuration unit 406, if the addresses are the same, reconfigures the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and performs network configuration through the compliant gateway address.
[0083] Figure 5A network configuration device for a handheld laser scanning device, provided in one or more embodiments of this specification, is described. The handheld laser scanning device integrates a wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is transmitted to the motherboard chip for processing, including:
[0084] At least one processor; and,
[0085] A memory communicatively connected to the at least one processor; wherein,
[0086] The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to:
[0087] Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance.
[0088] When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card;
[0089] If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then perform network configuration using the compliant gateway address.
[0090] This specification provides one or more embodiments of a non-volatile computer storage medium. The handheld laser scanning device integrates a wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) via the wired network card. Within this LAN, radar data collected by the radar module is transmitted to the motherboard chip for processing. The device stores computer-executable instructions, which are configured as follows:
[0091] Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance.
[0092] When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card;
[0093] If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then perform network configuration using the compliant gateway address.
[0094] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.
[0095] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.
[0096] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.
Claims
1. A network configuration method for a handheld laser scanning device, characterized in that, The handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) through the wired network card. Within this LAN, radar data collected by the radar module is sent to the motherboard chip for processing. The method includes: Once it is determined that the wireless network card is in a turned-off state, the wired network card is configured with a gateway using the historical gateway configuration records of the wired network card obtained in advance. When it is determined that the wireless network card is in the enabled state, it is checked whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card; If they are the same, reconfigure the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and then configure the network using the compliant gateway address. The network configuration via the qualified gateway address specifically includes: A communication connection is established using the gateway address in the historical gateway configuration record of the wired network card, and a network configuration command containing the required gateway address is sent to the radar module. After receiving feedback from the radar module that the gateway address of the wired network card has been successfully changed, the network card address of the wired network card is changed to the gateway address that meets the requirements. Before configuring the network using the qualified gateway address, the method further includes: Set the wireless network card to the off state, and after configuring the network through the qualified gateway address, set the wireless network card to the on state.
2. The method according to claim 1, characterized in that, After receiving feedback from the radar module that the gateway address of the wired network card has been successfully changed, the method further includes: Restart the radar module so that the compliant gateway address takes effect in the radar module.
3. The method according to claim 1, characterized in that, If the wired network card has no historical gateway configuration record, and the wireless network card is determined to be in a turned-off state, the method further includes: Obtain the initial network information of the radar module, and configure the wired network card as a gateway based on the initial network information of the radar module.
4. The method according to claim 1, characterized in that, Before configuring the wired network card using the historical gateway configuration records of the wired network card obtained in advance, the method further includes: The historical gateway configuration record of the wired network card obtained through the identifier of the wired network card.
5. A network configuration device for a handheld laser scanning device, characterized in that, The handheld laser scanning device has a built-in wireless network card, a wired network card, a motherboard chip, and a radar module. The radar module and the motherboard chip form a local area network (LAN) through the wired network card. Within this LAN, radar data collected by the radar module is sent to the motherboard chip for processing. The device includes: The first gateway configuration unit, upon determining that the wireless network card is in a turned-off state, configures the wired network card using the historical gateway configuration records of the wired network card obtained in advance; When the gateway detection unit determines that the wireless network card is in the enabled state, it detects whether the gateway address of the wireless network card is the same as the gateway address in the historical gateway configuration record of the wired network card. The second gateway configuration unit, if the addresses are the same, reconfigures the gateway address of the wired network card to obtain a compliant gateway address that is different from the gateway address of the wireless network card, and performs network configuration through the compliant gateway address. When the second gateway configuration unit performs network configuration via the qualified gateway address, it is specifically used for: A communication connection is established using the gateway address in the historical gateway configuration record of the wired network card, and a network configuration command containing the required gateway address is sent to the radar module. After receiving feedback from the radar module that the gateway address of the wired network card has been successfully changed, the network card address of the wired network card is changed to the gateway address that meets the requirements. Before configuring the network using the qualified gateway address, the process also includes: Set the wireless network card to the off state, and after configuring the network through the qualified gateway address, set the wireless network card to the on state.
6. A network configuration device for a handheld laser scanning device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to implement the network configuration method for a handheld laser scanning device as described in any one of claims 1-4.
7. A non-volatile computer storage medium, characterized in that, It stores computer-executable instructions, which, when executed by a computer, enable the network configuration method for a handheld laser scanning device as described in any one of claims 1-4.
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