CN104637147A - Method and device for searching network by triggering wireless communication module of fingerprint door lock - Google Patents

Abstract

The present invention provides a method and device for triggering a wireless communication module of a fingerprint door lock to search for a network, which is used to solve the problem that the current fingerprint door lock consumes a lot of power and may not be able to establish a connection with the network when the fingerprint door lock is in use. Including: when it is detected that the slide cover of the fingerprint door lock is opened, it is judged whether the wireless communication module of the fingerprint door lock is connected to the network; The nearby wireless network is searched in the segment, so that the wireless communication module establishes a connection with the searched wireless network. This solution reduces the power consumption of the fingerprint door lock.

Description

Method and device for searching network by wireless communication module triggering fingerprint door lock

technical field

The invention relates to the field of mobile communication, in particular to a method and device for searching a network by a wireless communication module triggering a fingerprint door lock.

Background technique

In the information society, the safety and anti-theft of public buildings and residential buildings are very important. Based on this, fingerprint door locks came into being. During the use of the fingerprint door lock, the user needs to store personal fingerprint information in the storage of the fingerprint door lock in advance. When the user's fingerprint is recognized, the door lock is opened or closed. Specifically, if the fingerprint information entered by the user If it matches the stored fingerprint information, the door lock will be opened, if not, the door lock will not be opened.

Fingerprint door locks generally use a wireless communication module to communicate with the network to authenticate the fingerprint input by the user and report the status of the door lock. When the wireless communication module cannot connect to the network, the wireless communication module will continue to search the surrounding wireless Communication network, this will lead to a large power consumption of fingerprint door locks, and because the current fingerprint door locks can not directly use the mains power, generally powered by batteries, so the requirements for power saving of fingerprint door locks are relatively high. High, at present, there is such a solution, that is, when the wireless communication module cannot be connected to the network, the periodic search is performed, for example, once a day. However, this method may perform network search and Automatically establish a connection, which wastes the power of the fingerprint door lock. At the same time, there may be a problem that the user cannot connect to the network when the fingerprint door lock needs to be used.

Contents of the invention

The present invention provides a method and device for triggering a wireless communication module of a fingerprint door lock to search for a network, which is used to solve the problem that the current fingerprint door lock consumes a lot of power and may not be able to establish a connection with the network when using the fingerprint door lock .

According to one aspect of the present invention, a method for triggering a wireless communication module of a fingerprint door lock to search for a network is provided, including: when it is detected that the slide cover of the fingerprint door lock is opened, judging whether the wireless communication module of the fingerprint door lock is connected to the network Connecting; when the wireless communication module is disconnected from the network, the wireless communication module is triggered to search for nearby wireless networks within a preset time period, so that the wireless communication module establishes a connection with the searched wireless network.

Wherein, triggering the wireless communication module to search for a nearby wireless network within a preset time period includes: triggering the zigbee node module in the wireless communication module to search for a nearby network coordinator, so that the zigbee node module establishes a connection with the network through the network coordinator.

Wherein, when it is detected that the slide cover of the fingerprint door lock is opened, judging whether the wireless communication module of the fingerprint door lock is connected to the network includes: when it is detected that the slide cover of the fingerprint door lock is slid open, triggering the micro The control unit MCU is interrupted, so that the MCU obtains the message whether the zigbee node module is connected with the network coordinator from the zigbee node module in the wireless communication module.

Wherein, triggering the wireless communication module to search for nearby wireless networks within a preset time period, so that the wireless communication module establishes a connection with the searched wireless network, includes: triggering the zigbee node module in the wireless module to search for the network within a preset time period The coordinator, after the search succeeds, stops the search and establishes a connection with the found network coordinator.

Further, the above method further includes, after detecting that the slide cover of the fingerprint door lock is closed, making the MCU in a dormant state.

According to another aspect of the present invention, a device for triggering a wireless communication module of a fingerprint door lock to search for a network is provided, including: a judging module for judging the wireless communication module of the fingerprint door lock when it is detected that the slide cover of the fingerprint door lock is opened. Whether the communication module remains connected to the network; the trigger module is used to trigger the wireless communication module to search for nearby wireless networks within a preset time period when the wireless communication module is disconnected from the network, so that the wireless communication module and the search to establish a connection to the wireless network.

Wherein, the triggering module is used to trigger the zigbee node module in the wireless communication module to search for a nearby network coordinator, so that the zigbee node module establishes a connection with the network through the network coordinator.

Wherein, the judging module is used for, when detecting that the sliding cover of the fingerprint door lock is slid open, the micro control unit MCU of triggering the fingerprint door lock is interrupted, so that the MCU obtains whether the zigbee node module from the zigbee node module in the wireless communication module A keepalive message with the network coordinator.

Wherein, the triggering module is used to trigger the zigbee node module in the wireless module to search for the network coordinator within a preset time period, and stop searching and establish a connection with the searched network coordinator after the search is successful.

Further, the above device also includes a sleep module, which is used to make the MCU sleep after detecting that the slide cover of the fingerprint door lock is closed.

The beneficial effects of the present invention are as follows:

According to the solution of the embodiment of the present invention, when it is detected that the slide cover of the fingerprint door lock is opened and its wireless communication module has not established a connection with the network, the wireless module of the fingerprint door lock is triggered to search for nearby wireless networks, which reduces the need for wireless communication modules to search. The length of time, reducing the power consumption of the fingerprint door lock.

Description of drawings

1 is a flowchart of a method for searching a network by a wireless communication module triggering a fingerprint door lock according to Embodiment 1 of the present invention;

Fig. 2 is a structural block diagram of an apparatus for triggering a wireless communication module of a fingerprint door lock to search a network according to Embodiment 2 of the present invention.

Detailed ways

In order to solve the problem of large power consumption of the existing fingerprint door lock, the present invention provides a method and device for triggering the wireless communication module of the fingerprint door lock to search the network. The following describes the present invention in detail in conjunction with the drawings and embodiments illustrate. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

Fig. 1 is the flow chart of the method for the wireless communication module that triggers the fingerprint door lock to search the network of embodiment 1 of the present invention, as shown in Fig. 1, this method comprises the following steps:

Step 101: When it is detected that the sliding cover of the fingerprint door lock is opened, determine whether the wireless communication module of the fingerprint door lock is connected to the network;

Preferably, the wireless communication module in this embodiment may include a zigbee node module, based on this, the step 101 may specifically include the following processing:

When it is detected that the slide cover of the fingerprint door lock is slid open, the MCU (Micro ControlUnit, micro control unit) that triggers the fingerprint door lock is interrupted to make it resume the running state, and then the MCU obtains from the zigbee node module whether the zigbee node module is connected to the network The message that the coordinator maintains the connection, that is, the operation of judging whether the zigbee node module is connected to the network can be performed by the zigbee node module itself, and then it feeds back the judging result to the MCU.

Step 102: When the wireless communication module is disconnected from the network connection, trigger the wireless communication module to search for nearby wireless networks within a preset time period.

Wherein, on the basis that the above-mentioned wireless communication module includes a zigbee node module, triggering the wireless communication module in step 102 to search for a nearby wireless network includes: triggering the zigbee node module to search for a nearby network coordinator, so that the zigbee node module passes through the network The coordinator establishes a connection with the network.

Wherein, triggering the wireless communication module to search for nearby wireless networks within a preset time period may specifically include: triggering the zigbee node module to search for a network coordinator within a preset time period, for example, 20 seconds, and at the same time, in order to further reduce power consumption After judging that the zigbee node module search is successful, stop the search and establish a connection with the searched network coordinator.

In this embodiment, when the door lock is not in use, both the MCUs can be put into a dormant state, so the above method can further include, after the MCU detects that the slide cover of the fingerprint door lock is closed, put itself into a dormant state .

Preferably, the zigbee node module in the present embodiment, hereinafter referred to as node or zigbee node, establishes a connection with the network through the network coordinator and specifically can include the following processes:

The zigbee network in this embodiment is established through a network coordinator. It should be noted that any zigbee node must meet the following two requirements to form a network:

(1) The node is FFD (Full Function Device, full-featured node), with the ability of zigbee coordinator;

(2) The node is not yet connected to other networks. When the node is already connected to other networks, this node can only be used as a child node of the network, because there is only one network coordinator in a zigbee network.

After performing the above steps, determine the network coordinator:

First determine whether the node is an FFD node, and then determine whether the FFD node is in another network or whether a coordinator already exists in the network. Through active scanning, send a beacon request command (Beaconrequest command), and then set a scan period (T_scan_duration), if no beacon is detected within the scan period, then it is considered that FFD has no coordinator in its pos, then this Then you can build your own zigbee network, and as the coordinator of this network, you can continuously generate beacons and broadcast them. Among them, there can only be one coordinator in a network.

After the network coordinator is determined, the channel scanning process is performed:

Channel scanning includes two processes of energy scanning and active scanning. First, energy detection is performed on the specified channel or the default channel to avoid possible interference. Channel sorting is performed on the measured energy values in an incremental manner, channels whose energy values exceed the allowable energy level are discarded, channels with allowable energy levels are selected, and these channels are marked as available channels. Then perform an active scan to search for network information within the communication radius of the node. These information are broadcast in the network in the form of beacon frames. Nodes obtain these beacon frames through active channel scanning, and then find a best, relatively quiet channel based on this information, and select a channel through the recorded results. The channel should have minimal zigbee network present, preferably no zigbee devices. During active scanning, the MAC layer will discard all frames received by the PHY layer data service except beacons.

Set network ID:

After finding a suitable channel, the coordinator will select a network identifier (PAN ID, value<=0x3FFF) for the network. This ID is unique in the channel used, and cannot conflict with other zigbee networks, and cannot It is the broadcast address 0xFFFF (this address is reserved and cannot be used). The PAN ID can be obtained by listening to the IDs of other networks and then selecting an ID that will not conflict, or you can manually specify the channel to scan to determine the PAN ID that does not conflict with other networks.

There are two address modes in the zigbee network: extended address (64 bits) and short address (16 bits), where the extended address is assigned by the IEEE organization for unique device identification; the short address is used for device identification in the local network, In a network, the short address of each device must be unique. When a node joins the network, it is assigned by its parent node and communicates by using the short address. For the coordinator, the short address is usually set to 0x0000.

After the above steps are completed, the zigbee mesh network is successfully initialized, and then it waits for other nodes to join. When a node joins the network, it will select the parent node (including the coordinator) with the strongest signal within the range to join the network. After success, it will get a short network address and send and receive data through this address. The network topology and address will be saved in their respective in the flash.

Zigbee node module, join the network through the coordinator:

When the coordinator is determined, the node first needs to establish a connection with the coordinator to join the network.

In order to establish a connection, the FFD node needs to make a request to the coordinator. After receiving the connection request of the node, the coordinator decides whether to allow the connection according to the situation, and then responds to the node requesting the connection. After the node establishes a connection with the coordinator, it can be realized. Sending and receiving of data. The specific process of nodes joining the network can be divided into the following steps:

Find the network coordinator:

First, it will actively scan to find the coordinator of the surrounding network. If a beacon is detected within the scanning period, the relevant information of the coordinator is obtained, and then a connection request is sent to the coordinator. After selecting an appropriate network, the upper layer will request the MAC layer to set the PIB attributes such as phyCurrentChannel and macPANID of the physical layer PHY and the MAC layer accordingly.

Send association request command (Associate request command): the node sends the association request command to the coordinator, and the coordinator immediately replies with an acknowledgment frame (ACK) after receiving it, and at the same time sends a connection instruction primitive to its upper layer, indicating that it has received the node’s Connection request. But this does not mean that the connection has been established, it only means that the coordinator has received the connection request from the node. When the upper layer of the mac layer of the coordinator receives the connection indication primitive, it will decide whether to agree to the joining request of this node according to its own resource conditions (storage space and energy), and then send a response to the mac layer of the node.

Wait for the coordinator to process:

After the node receives the ACK of the coordinator's join association request command, the node mac will wait for a period of time to accept the connection response from the coordinator. Within a predetermined time, if a connection response is received, it notifies this response to its upper layer. When the coordinator sends a response to the node's mac layer, it will set a waiting response time (T_ResponseWaitTime) to wait for the coordinator to process its join request command. If the resources of the coordinator are sufficient, the coordinator will assign a 16-bit short message to the node. Address, and generate a connection response command containing the new address and connection success status, then this node will successfully establish a connection with the coordinator and can start communication. If the resources of the coordinator are insufficient, the node to be joined will resend the request information, and the direct access to the network is successful.

Send data request command:

If the coordinator agrees with the node to join within the response time, an Associate response command (Associate response command) will be generated and stored. When the response time has elapsed, the node sends a data request command (Datarequest command) to the coordinator, and the coordinator immediately replies ACK after receiving it, and then sends the stored associated response command to the node. If the coordinator has not decided whether to allow the node to join after the response time is up, the node will try to extract the associated response command from the beacon frame of the coordinator. If it succeeds, the network can be successfully connected, otherwise the request information will be resent until the network is successfully connected.

It should be noted that the above networking mode of the zigbee node module is only a preferred implementation method of this embodiment, and it is not the only implementation mode. After the network coordinator is found by zigbee, networking can also be carried out according to other existing methods. They are not listed here.

Example 2

Fig. 2 is a structural block diagram of a device for searching a network by a wireless communication module that triggers a fingerprint door lock according to Embodiment 2 of the present invention. As shown in Fig. 2 , the device 20 includes the following components:

Judging module 21, used to judge whether the wireless communication module of the fingerprint door lock is connected to the network when the slide cover of the fingerprint door lock is detected to be opened;

The trigger module 22 is configured to trigger the wireless communication module to search for nearby wireless networks within a preset time period when the wireless communication module is disconnected from the network connection.

Wherein, the above-mentioned triggering module 22 can be specifically used to trigger the zigbee node module in the wireless communication module to search for an attached network coordinator, so that the zigbee node module can establish a connection with the network through the network coordinator.

The above-mentioned judging module 21 is specifically used for, when it is detected that the slide cover of the fingerprint door lock is slid open, the micro control unit MCU of the trigger fingerprint door lock is interrupted, so that the MCU obtains from the zigbee node module whether the zigbee node module is connected with the network coordinator Keep connected messages.

Wherein, the above-mentioned triggering module 22 is used to trigger the zigbee node module to search for the network coordinator within a preset time period, and stop searching and establish a connection with the searched network coordinator after the search is successful.

In order to further save energy for the fingerprint door lock, the above device may further include a sleep module, configured to put the MCU in a sleep state after detecting that the slide cover of the fingerprint door lock is closed.

In the solution of the embodiment of the present invention, when it is detected that the slide cover of the fingerprint door lock is opened and its wireless communication module has not established a connection with the network, the wireless communication module of the fingerprint door lock is triggered to search for nearby wireless networks. The number of times the fingerprint door lock is used within is limited, so the number of times the wireless communication module is triggered to search for accessory wireless network events is also limited, thus reducing the search time of the wireless communication module and reducing the power consumption of the fingerprint door lock.

Although preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and therefore, the scope of the present invention should not be limited to the above-described embodiments.

Claims (10)

1. A method for triggering a wireless communication module search network of a fingerprint door lock, characterized in that, comprising: When it is detected that the slide cover of the fingerprint door lock is opened, it is judged whether the wireless communication module of the fingerprint door lock is connected to the network; When the wireless communication module is disconnected from the network connection, the wireless communication module is triggered to search for nearby wireless networks within a preset time period, so that the wireless communication module establishes a connection with the searched wireless network. 2. The method according to claim 1, wherein the triggering the wireless communication module to search for nearby wireless networks within a preset time period comprises: Triggering the zigbee node module in the wireless communication module to search for a nearby network coordinator, so that the zigbee node module establishes a connection with the network through the network coordinator. 3. The method according to claim 1, wherein when it is detected that the slide cover of the fingerprint door lock is opened, judging whether the wireless communication module of the fingerprint door lock remains connected to the network comprises: When the sliding cover of the fingerprint door lock is detected to be slid open, the micro control unit MCU of the fingerprint door lock is triggered to generate an interrupt, so that the MCU obtains whether the zigbee node module from the zigbee node module in the wireless communication module A keepalive message with the network coordinator. 4. The method according to claim 1, wherein the triggering of the wireless communication module searches for nearby wireless networks within a preset period of time, so that the wireless communication module establishes a connection with the searched wireless network ,include: Trigger the zigbee node module in the wireless module to search for the network coordinator within a preset time period, and stop searching and establish a connection with the searched network coordinator after the search is successful. 5. The method according to any one of claims 1-4, further comprising, after detecting that the slide cover of the fingerprint door lock is closed, making the MCU of the fingerprint door lock sleep state. 6. A device for triggering a wireless communication module of a fingerprint door lock to search for a network, characterized in that it comprises: A judging module, used to judge whether the wireless communication module of the fingerprint door lock is connected to the network when the slide cover of the fingerprint door lock is detected to be opened; A trigger module, configured to trigger the wireless communication module to search for nearby wireless networks within a preset period of time when the wireless communication module is disconnected from the network connection, so that the wireless communication module and the searched The wireless network establishes a connection. 7. The device according to claim 6, wherein the trigger module is used to trigger the zigbee node module in the wireless communication module to search for nearby network coordinators so that the zigbee node module passes through the The network coordinator establishes a connection with the network. 8. The device according to claim 6, wherein the judging module is used for: When the sliding cover of the fingerprint door lock is detected to be slid open, the micro control unit MCU of the fingerprint door lock is triggered to generate an interrupt, so that the MCU obtains whether the zigbee node module from the zigbee node module in the wireless communication module A keepalive message with the network coordinator. 9. The device according to claim 6, wherein the trigger module is used to trigger the zigbee node module in the wireless module to search for the network coordinator within a preset time period, and after the search is successful, Stop the search and establish a connection with the found network coordinator. 10. The device according to any one of claims 6-9, characterized in that the device further comprises a dormancy module, configured to enable the fingerprint door lock to The locked MCU is in sleep state.