CN108494671A - Gateway equipment - Google Patents
Gateway equipment Download PDFInfo
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- CN108494671A CN108494671A CN201810224363.1A CN201810224363A CN108494671A CN 108494671 A CN108494671 A CN 108494671A CN 201810224363 A CN201810224363 A CN 201810224363A CN 108494671 A CN108494671 A CN 108494671A
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- 230000008901 benefit Effects 0.000 abstract description 2
- 230000006854 communication Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Computer And Data Communications (AREA)
Abstract
The present invention discloses a gateway device, which is connected with a first device adopting a first protocol and a second device adopting a second protocol, and comprises a protocol conversion unit for performing protocol conversion between the first protocol and the second protocol, and is characterized in that the gateway device comprises: the protocol identification unit is used for receiving a protocol point table which comprises working parameters of second equipment and is based on a first protocol, and creating a protocol point table database corresponding to the protocol point table; and the protocol selection unit is connected with the first equipment through a first link and connected with the second equipment through a protocol conversion unit and is used for selecting a protocol stack of a first protocol and binding the protocol stack with the first link and the protocol point table database respectively. The invention has the advantages that: the configuration of a building centralized control system is simplified, and the system is convenient for users to adopt.
Description
Technical field
The present invention relates to a kind of network communication equipment, especially a kind of gateway device.
Background technology
With the development of Internet of Things and universal, intelligent building starts to occur, by multiple systems, such as HVAC system
The centralized control of system, lighting system, security system, fire-fighting system etc. provides good usage experience to the user and lives and experiences.
This multiple system is usually produced by different manufacturers, and carrying is different communication protocol, causes to need to configure in intelligent building more
A protocol conversion gateway.These protocol conversion gateways are typically to set unified convert of the different agreement of the multiple system in order to control
The agreements such as standby used BACnet, Modbus, to carry out centralized control to building by control device.
As shown in Figure 1, HVAC system, lighting system, security system and fire-fighting system are installed in single building, described four
A system (i.e. controlled device or slave computer) passes through protocol conversion gateway 1 to 4 and control device (i.e. host computer, such as control respectively
The PC machine etc. of system) communication connection.By taking the communication of control device and HVAC system as an example, it is assumed that control device is assisted using BACnet
View, HVAC system uses Modbus agreements, when specific works, when protocol conversion gateway 1 receive from control device based on
After first data frame of BACnet agreements, the first data frame is first converted into the second data frame based on Modbus agreements, then send out
Give HVAC system；The communication process of negative direction is similar, that is, when receiving based on Modbus agreements from HVAC system
After three data frames, third data frame is first converted into the 4th data frame based on BACnet agreements, is then forwarded to control device.
The above-mentioned prior art has the following disadvantages：Single building are needed using multiple protocol conversion gateways respectively to multiple systems
The agreement of system is converted, and causes the configuration of building centralized control system sufficiently complex, is not easy to user's use.
Invention content
In view of this, the present invention provides a kind of gateway device, multiple systems with different agreement can be compatible with.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of gateway device, the gateway device and the first equipment using the first agreement and second using second protocol
Equipment connects, and includes the conversion unit of protocol for carrying out protocol conversion between the first agreement and second protocol, special
Sign is that the gateway device includes：
Protocol identification unit includes the running parameter of the second equipment and the protocol point table based on the first agreement for receiving,
Create protocol point table database corresponding with the protocol point table；
Agreement selecting unit is connect by the first link with first equipment, and conversion unit of protocol and described the are passed through
Two equipment connect, the protocol stack for selecting the first agreement from multiple protocol stacks, by the protocol stack respectively with described first
Link and the protocol point table database binding.
Preferably, protocol identification unit identifies first agreement according to the protocol point table, generates first agreement
Identification information；
Agreement selecting unit selects the first agreement according to the identification information of first agreement from multiple protocol stacks
Protocol stack.
Preferably, the conversion unit of protocol converts the first data frame based on the first agreement from the protocol stack
For the second data frame based on second protocol, and it is sent to the second equipment, wherein first data frame is that the protocol stack is logical
Cross what first link was received from the first equipment, and/or, by the third data frame based on second protocol from the second equipment
The 4th data frame based on the first agreement is converted to, and is sent to the protocol stack.
Preferably, when the protocol stack receives first data frame, the protocol stack is from the protocol point table number
According to the running parameter for obtaining second equipment in library, first data frame and running parameter are sent to the protocol conversion
Unit；
The conversion unit of protocol is converted to second data according to the running parameter, by first data frame
Frame.
Preferably, the gateway device further includes embedded web server, is received by the embedded web server
The protocol point table, and the protocol point table is sent to the protocol identification unit.
Preferably, the gateway device further includes plane type recognition unit；
The embedded web server receives the model information of second equipment before receiving the protocol point table,
The model information is sent to the plane type recognition unit；
The plane type recognition unit identifies the type of second equipment according to the model information, and by the type
Feed back to the embedded web server；
The embedded web server exports the identification information of optional protocol point table corresponding with the type, and receives
Protocol point table.
Preferably, the embedded server includes information exchange unit, for receiving the plane type recognition unit feedback
Type, and export the information of corresponding with the type optional protocol point table.
Preferably, the gateway device further includes scheduling unit, and the scheduling unit is received from the protocol identification unit
The identification information of first agreement, and the identification information of first agreement is sent to the agreement selecting unit.
Preferably, the gateway device further includes storage unit, and the protocol identification unit is by the protocol point table data
Library storage is in the storage unit.
Preferably, the gateway device includes first interface, the first interface and first equipment and the agreement
Selecting unit connects, and is communicated with the agreement selecting unit by first link；And/or
The gateway device includes second interface, the second interface and the conversion unit of protocol and second equipment
Connection.
Preferably, the first interface includes Ethernet interface；And/or the second interface include KNX interfaces,
LonWorks interfaces, CAN interface, RS-485 interfaces or HBS interfaces.
Preferably, first agreement includes BACnet agreements, Modbus agreements, Lonworks agreements or KNX agreements；
And/or the second protocol includes HBS agreements, Modbus agreements or CAN protocol.
Preferably, second equipment has multiple, and in same building.
Preferably, second equipment includes HVAC system, lighting system, security system and/or fire-fighting system.
Gateway device provided by the invention includes multiple standard protocol stacks, multiple standard protocol stack at present on the market
Multiple agreements that control device may use are corresponding, and user only needs to import corresponding with multiple agreement including second sets
The protocol point table of standby running parameter, you can the second equipment that each producer produces is linked into the gateway device, passes through control
The second equipment of equipment pair carries out centralized control, to, single building only need that centralized control can be realized using a gateway device,
The configuration of building centralized control system is simplified, it is user-friendly.
Description of the drawings
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the structural schematic diagram of intelligent building centralized control system in the prior art；
Fig. 2 shows the structural schematic diagrams of gateway device provided by the invention；
Fig. 3 shows the configuration process flow chart of gateway device provided by the invention；
Fig. 4 shows the login interface of embedded web server；
Fig. 5 shows the gateway information configuration interface of embedded web server；
Fig. 6 shows the Unit-type sclection interface of embedded web server；
Fig. 7 shows that the protocol point table of embedded web server imports interface.
Specific implementation mode
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.In order to
The essence for the present invention that avoids confusion, there is no narrations in detail for well known method, process, flow, element.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being containing for " including but not limited to "
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Gateway device in the embodiment of the present invention is as shown in Fig. 2, the gateway device and the first equipment for using the first agreement
It is connected with using the second equipment of second protocol.
First equipment is control device or host computer, that is, is used to control HVAC system, lighting system, the peace in intelligent building
The control device of insurance system, fire-fighting system, for example, control centre PC machine etc..BACnet agreements may be used in first equipment,
Modbus agreements, the standard communication protocols such as Lonworks agreements, KNX agreements are communicated with gateway device.
Second equipment is the controlled plants such as HVAC system, lighting system, security system, fire-fighting system in intelligent building.
Second equipment may be used the communication protocols such as HBS agreements, Modbus agreements, CAN protocol and be communicated with gateway device.
In order to realize the basic function (i.e. protocol conversion function) of gateway device, protocol conversion list is set inside gateway device
Member realizes that the mutual protocol conversion between the first agreement and second protocol is converted, that is, when gateway is set using the conversion unit of protocol
When standby the first data frame based on the first agreement for receiving the transmission of the first equipment, conversion unit of protocol is converted into based on the
After second data frame of two agreements, it is then forwarded to the second equipment, and/or, when gateway device receives the base of the second equipment transmission
When the third data frame of second protocol, after conversion unit of protocol is converted into the 4th data frame based on the first agreement, then
It is sent to the first equipment.
Wherein, the first data frame can be that control device equipment is sent to the control command of controlled plant, querying command etc.,
Third data frame can be the data that controlled plant is actively reported to control device according to pre-defined rule, can also be controlled plant
Control command based on control device or querying command, the reply data fed back to control device, such as implementing result, inquiry knot
Fruit etc..
Specifically, gateway device is connect by first interface with the first equipment, is connect with the second equipment by second interface.
Second interface can have multiple, be connect respectively with the second multiple and different equipment, and multiple second equipment may be used not
Same second protocol, such as HBS agreements, Modbus agreements, CAN protocol etc..
Second interface is connect with conversion unit of protocol, and what is transmitted on link between the two is the data based on second protocol
Frame.
Gateway device further comprises protocol identification unit, agreement selecting unit, scheduling unit, storage unit.Wherein, it adjusts
For being scheduled to the task of gateway device, storage unit needs to protect at work degree unit for storing gateway device
The data deposited, specific scheduling mechanism and memory mechanism belong to the prior art, repeat no more below, only introduce and the prior art
Difference.
Protocol identification unit includes the running parameter of the second equipment and the protocol point table based on the first agreement, root for receiving
First agreement is identified according to the protocol point table, generates the identification information of first agreement, and create and the protocol point
The corresponding protocol point table database of table, wherein the protocol point table includes the running parameter of the second equipment.
Agreement selecting unit, the unit are connect by the first link with first equipment, by conversion unit of protocol with
The second equipment connection, and for the identification information according to first agreement, selected from multiple protocol stacks corresponding
Protocol stack, by the protocol stack respectively with first link and the protocol point table database binding.
Why gateway device in the embodiment of the present invention can be compatible with the second equipment using different agreement, and key point exists
In having been imported in gateway device in advance with the second device-dependent protocol point table, the shape which passes through the first agreement
Formula stores the running parameter of the second equipment.
For using BACnet agreements, the second equipment to use Modbus agreements with the first equipment below, to gateway device
Operation principle illustrates, and when the first equipment and the second equipment use other agreements, operation principle is similar.
When the second equipment is connected to gateway device, the protocol point based on BACnet agreements is imported in gateway device
Table, the protocol point table include the running parameter of the second equipment.
Protocol identification unit receives the above-mentioned protocol point table based on BACnet agreements, and is identified according to the protocol point table
Go out BACnet agreements.Protocol identification unit also creates protocol point table database corresponding with the protocol point table, and storage is set to gateway
In standby storage unit.Also, identification information (such as the protocol name for the BACnet agreements that protocol identification unit will identify that
" BACnet ") and create protocol point table database be sent to scheduling unit.
The main task of scheduling unit is scheduled to the task of gateway device, and specific scheduling process belongs to existing
There is technology, which is not described herein again.Scheduling unit receives above-mentioned BACnet agreements, and it is single that BACnet agreements are sent to agreement selection
Member.
By the first link, (i.e. link a) in Fig. 2 is connect agreement selecting unit with first interface, and first interface is again with
One equipment connects.After agreement selecting unit receives the identification information (such as protocol name " BACnet ") of BACnet agreements, from
Corresponding protocol stack (i.e. BACnet protocol stacks) is selected in multiple protocol stacks, and BACnet protocol stacks and link a are bound；Also,
Agreement selecting unit is negotiated with scheduling unit, under the assistance of scheduling unit, by BACnet protocol stacks and above-mentioned protocol point table number
It is bound according to library.
So far, the second equipment is connected to gateway device, and the first equipment can be in communication with each other with the second equipment.
When the first equipment sends the first data frame based on BACnet agreements by first interface to the second equipment, due to
Link a is bound with BACnet protocol stacks, thus the first data frame is sent to BACnet protocol stacks, by BACnet protocol stacks
It is handled.BACnet protocol stacks obtain the running parameter of the second equipment from the protocol point table database bound with it, then,
First data frame and the running parameter are sent jointly into conversion unit of protocol.
After conversion unit of protocol receives the first data frame and running parameter, the first data frame is converted according to running parameter
For the second data frame based on Modbus agreements, the second data frame is then sent to by the second equipment by second interface.
The operation principle of negative direction is similar.When conversion unit of protocol receives the base from the second equipment by second interface
When the third data frame of Modbus agreements, third data frame is converted to the 4th based on BACnet agreements by conversion unit of protocol
Data frame is then sent to BACnet protocol stacks.After BACnet protocol stacks receive the 4th data frame, storage and forwarding behaviour are executed
Make, that is, the 4th data frame is first saved in the storage unit of gateway device, first interface is then sent to by link a,
The 4th data frame is sent to the first equipment by first interface again.
In the above-described embodiments, importing the protocol point table based on BACnet agreements in gateway device specifically can be by embedding
Enter formula Web server to realize.
As shown in Fig. 2, embedded web server is arranged in gateway device, which connect with first interface, passes through
First interface receives configuration data from the first equipment, at this point, the first equipment is also the configuration equipment of gateway.
It is of course also possible to not use configuration equipment of first equipment as gateway, that is, the first equipment and matching for gateway install
Standby is not same equipment, at this point, embedded web server can be connected by the configuration equipment of other interfaces and gateway, is matched from this
Install standby reception configuration data.
Below by taking embodiment shown in Fig. 2 as an example, used using BACnet agreements, the second equipment for the first equipment
Modbus agreements and the situation that the second equipment is the air-conditioner set in HVAC system, the configuration to embedded web server
Journey and the course of work of gateway device are explained and illustrated, and the operation principle of other embodiment is similar.
When air-conditioner set to be connected in gateway device, user first configures gateway device, passes through the first equipment
(i.e. control device or host computer) accesses the embedded web server in gateway device, according to the factory default IP of gateway device
The embedded log-on webpage of gateway is asked in address, as shown in figure 4, after inputting account and password in the log-on webpage, transmission is stepped on
Record request.
Embedded web server verifies account and password, if account and Password Input are correct, verification is logical
It crosses, jumps to gateway information configuration interface.
User submits gateway configuration information in this interface, including：Gateway device IP, subnet mask, default gateway, equipment
Information (title and ID) etc., and input the model information (such as multi-joint unit or monoblock) of the unit, and with the machine
The corresponding BACnet protocol points table of type of group, which includes the running parameter of unit, the actually work of unit
The form of expression of the parameter in BACnet agreements.
About the specific input process of protocol point table, referring to Fig. 6, user first selects model information (example in above-mentioned interface
Multi-joint unit is such as selected in drop-down list), which is sent to plane type recognition unit, and plane type recognition unit is according to machine
Type information, identifies the specific model (for example, identifying monoblock) of unit, then feeds back to the specific model embedded
Web server.The specific model that plane type recognition unit also will identify that is sent to scheduling unit, is convenient for the subsequent tune of scheduling unit
Spend work.
Specifically, embedded server may include information exchange unit, the tool for receiving type recognition unit feedback
Body type, and export the identification information of optional protocol point table corresponding with the specific model.
Embedded web server then shows the identification information of optional protocol point table in interface, such as including protocol point
The drop-down list (as shown in Figure 7) of table name.User then according to the identification information of the protocol point table of display, selects specific association
View point table, you can the protocol point table is imported into gateway device.
Then, protocol point table is sent to protocol identification unit by embedded web server, and protocol identification unit is according to the association
View point table identifies BACnet agreements, creates protocol point table database corresponding with protocol point table, and be saved in storage unit.
Protocol identification unit also sends out the identification information of BACnet agreements (such as protocol name " BACnet ") and protocol point table database
Give scheduling unit.
Scheduling unit receives the identification information (such as protocol name " BACnet ") of BACnet agreements, sends it to agreement
Selecting unit.In another embodiment, protocol identification unit can also directly send the identification information of BACnet agreements
To the agreement selecting unit, and without scheduling unit.
After agreement selecting unit receives the identification information (such as protocol name " BACnet ") of BACnet agreements, from multiple
BACnet protocol stacks are selected in protocol stack, and BACnet protocol stacks and link a are bound；Also, agreement selecting unit is single with scheduling
Member is negotiated, under the assistance of scheduling unit, by BACnet protocol stacks and above-mentioned protocol point table database binding.
By above procedure, the second equipment is successfully connected to gateway device, and subsequent first equipment and the second equipment can be with
Data are exchanged by gateway.
Gateway device provided by the invention met by the way that Web server to be embedded into international standard BACnet IP,
In the protocol gateways such as Modbus RTU/TCP, user only need to be in the gateway information configuration interface that embedded web server provides
Import the protocol point table of controlled plant, you can the equipment that each producer produces is linked into the gateway device, so that Dan Dong
Building only need that using a gateway device centralized control can be carried out, and simplify the configuration of building centralized control system, improve
The convenience that user uses.
Although the present invention by the way of embedded web server for user input related data (, this field skill
Art personnel using other input modes it is to be understood that can also realize the present invention.
Those skilled in the art will readily recognize that under the premise of not conflicting, above-mentioned each preferred embodiment can be free
Ground combination, superposition.
It should be appreciated that above-mentioned embodiment is merely exemplary, and not restrictive, without departing from the basic of the present invention
In the case of principle, those skilled in the art can be directed to the various apparent or equivalent modification or replace that above-mentioned details be made
It changes, is all included in scope of the presently claimed invention.
Claims (14)
1. a kind of gateway device, the gateway device is set with the first equipment using the first agreement and second using second protocol
Standby connection, which is characterized in that the gateway device includes：
Conversion unit of protocol, for carrying out protocol conversion between the first agreement and second protocol；
Protocol identification unit includes the running parameter of the second equipment and the protocol point table based on the first agreement for receiving, creates
Protocol point table database corresponding with the protocol point table；
Agreement selecting unit is connect with first equipment by the first link, is set by conversion unit of protocol and described second
Standby connection, the protocol stack for selecting the first agreement, by the protocol stack respectively with first link and the protocol point table
Database binding.
2. gateway device according to claim 1, it is characterised in that：
Protocol identification unit identifies first agreement according to the protocol point table, generates the identification information of first agreement；
Agreement selecting unit selects the agreement of the first agreement according to the identification information of first agreement from multiple protocol stacks
Stack.
3. gateway device according to claim 2, it is characterised in that：
The conversion unit of protocol is converted to the first data frame based on the first agreement from the protocol stack based on second
Second data frame of agreement, and be sent to the second equipment, wherein first data frame is the protocol stack by described first
Link is received from the first equipment, and/or, the third data frame based on second protocol from the second equipment is converted to and is based on
4th data frame of the first agreement, and it is sent to the protocol stack.
4. gateway device according to claim 3, it is characterised in that：
When the protocol stack receives first data frame, the protocol stack obtains institute from the protocol point table database
First data frame and running parameter are sent to the conversion unit of protocol by the running parameter for stating the second equipment；
The conversion unit of protocol is converted to second data frame according to the running parameter, by first data frame.
5. gateway device according to claim 2, which is characterized in that the gateway device further includes embedded Web service
Device receives the protocol point table by the embedded web server, and the protocol point table is sent to the protocol identification
Unit.
6. gateway device according to claim 5, it is characterised in that：
The gateway device further includes plane type recognition unit；
The embedded web server receives the model information of second equipment, by institute before receiving the protocol point table
It states model information and is sent to the plane type recognition unit；
The plane type recognition unit identifies the type of second equipment according to the model information, and the type is fed back
To the embedded web server；
The embedded web server exports the identification information of optional protocol point table corresponding with the type, and receives agreement
Point table.
7. gateway device according to claim 6, it is characterised in that：
The embedded server includes information exchange unit, the type for receiving the plane type recognition unit feedback, and defeated
Go out the information of optional protocol point table corresponding with the type.
8. gateway device according to claim 6, which is characterized in that the gateway device further includes scheduling unit, described
Scheduling unit receives the identification information of first agreement from the protocol identification unit, and the identification of first agreement is believed
Breath is sent to the agreement selecting unit.
9. gateway device according to claim 1, it is characterised in that：
The gateway device further includes storage unit, and the protocol identification unit is by the protocol point table database purchase described
In storage unit.
10. gateway device according to claim 1, it is characterised in that：
The gateway device includes first interface, and the first interface connects with first equipment and the agreement selecting unit
It connects, and is communicated with the agreement selecting unit by first link；And/or
The gateway device includes second interface, and the second interface connects with the conversion unit of protocol and second equipment
It connects.
11. gateway device according to claim 10, it is characterised in that：
The first interface includes Ethernet interface；And/or the second interface includes KNX interfaces, LonWorks interfaces, CAN
Interface, RS-485 interfaces or HBS interfaces.
12. according to the gateway device described in one of claim 1-11, it is characterised in that：
First agreement includes BACnet agreements, Modbus agreements, Lonworks agreements or KNX agreements；And/or
The second protocol includes HBS agreements, Modbus agreements or CAN protocol.
13. according to the gateway device described in one of claim 1-11, which is characterized in that second equipment have it is multiple,
And in same building.
14. according to the gateway device described in one of claim 1-11, which is characterized in that second equipment includes HVAC
System, lighting system, security system and/or fire-fighting system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810224363.1A CN108494671A (en) | 2018-03-19 | 2018-03-19 | Gateway equipment |
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| CN201810224363.1A CN108494671A (en) | 2018-03-19 | 2018-03-19 | Gateway equipment |
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Cited By (5)
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| CN109450924A (en) * | 2018-12-03 | 2019-03-08 | 哈尔滨工业大学 | A kind of configurable implementation method of the communications protocol of embedded system |
| CN110362009A (en) * | 2019-07-15 | 2019-10-22 | 珠海格力电器股份有限公司 | Building system configuration logic generation method and device and building system |
| CN110376408A (en) * | 2019-07-29 | 2019-10-25 | 苏州和欣致远节能科技有限公司 | A kind of ammeter of band BACnet controller function |
| CN111600792A (en) * | 2020-04-26 | 2020-08-28 | 珠海格力电器股份有限公司 | Gateway device, device control system, device control method and device |
| CN114172800A (en) * | 2021-11-25 | 2022-03-11 | 浙江源创智控技术有限公司 | KNX multi-gateway communication method, device, equipment and storage medium |
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| CN102769608A (en) * | 2012-02-28 | 2012-11-07 | 重庆和航科技股份有限公司 | Internet of things protocol conversion system and method |
| CN105049304A (en) * | 2015-07-03 | 2015-11-11 | 中山火炬职业技术学院 | Internet-of-thing terminal access gateway supporting multi-heterogeneous transmission module and application system |
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