CN207995122U - A kind of multi-protocols intelligent gateway based on narrowband Internet of Things - Google Patents

Abstract

The utility model is related to a kind of multi-protocols intelligent gateway based on narrowband Internet of Things, which includes low-power consumption unit and performance units；The low-power consumption unit include low power consumption control device, solar panel, the power management module for managing power supply mode and battery status information, for receiving the NB IOT modules from cloud server information, LoRa modules and signal collection modulation module for obtaining scene LoRa nodal informations in local LPWAN, wherein low power consumption control device respectively with the power management module, NB IOT modules and LoRa module two-way communications；The performance units include high performance controller, the RS485 interface modules for connecting RS485 nodes, the human-machine interface module for connecing serial ports of computers or serial port liquid crystal screen, GPS interface module, data memory module and ethernet interface module.The gateway efficiently solves low-power consumption and high performance coordination problem under multiple application scenarios by the way of low-power consumption unit and performance units collaboration.

Description

A kind of multi-protocols intelligent gateway based on narrowband Internet of Things

Technical field

The utility model is related to low-power consumption wide area wireless communication field more particularly to a kind of more associations based on narrowband Internet of Things Intelligent gateway is discussed, internet is accessed for low power consumption wireless network in Internet of things system, is and the relevant low cost of the network interconnection Low-power consumption wide area network access device.

Background technology

New round scientific and technological revolution and industry transformation are drive by the Information and Communication Technology of representative of Internet of Things, is changed deeply Conventional industries form and life style.As the essential condition that Internet of Things industry is risen, various wireless technologys are constantly broken through, and are pushed More sensor devices access network, and a wide range of, large-scale concatenation ability is provided for Internet of Things.Except operator's wide area network Other than GPRS and 4G, also ZigBee, Wi-Fi, Bluetooth of LAN, but these wireless technologys cannot take into account it is long away from From and low-power consumption.Low-power wide area network (LPWAN) technology overcomes under complex environment communication distance and long-term in the world Multiple problems such as battery powered when arrangement, rapid rising is simultaneously gradually commercial, forms the network connection service using LPWAN as core System.

The LPWAN technologies to attract attention at present can be divided into two classes：One kind is non-authorized spectrum band technology, including LoRa and Sigfox.Another is authorized spectrum band technology, and the NB-IOT released using international telecommunication standards setting organizations 3GPP is representative.Telecommunications is transported Quotient is sought using having resource of frequency range advantage, the Connection Service ability of NB-IOT (narrowband Internet of Things) internet of things oriented is provided, it can be with Ensure access public mobile network.And for industry user, build the LoRaWAN of itself using unauthorized frequency range LoRa technologies Internet of things service of using by oneself is provided, there are the relatively low advantages such as controllable of network deployment simple and flexible, cost of serving.Comprehensive analysis cost and Flexibility, live LoRa nodes by gateway, in such a way that NB-IOT accesses public network will Long Coexistence, meet NB- The multi-protocols intelligent gateway of IOT and LoRa to interconnect is a kind of effective solution scheme.

Such as publication No. CN107249211A discloses a kind of intelligent gateway and operational process based on LoRa and NB-IoT, Use NB-IOT, LoRa, GPS and bluetooth multiple technologies.Such as publication No. CN107027162A discloses a kind of LoRa intelligence Gateway and its application method, Internet of things system, using multi-mode communication module, the communication mode of compatible new and old Internet of things system.This The mode that two kinds of public technologies all use NB-IOT and LoRa interconnections designs gateway.But existing things-internet gateway all uses The mode of Single Controller, if complicated mission requirements cannot individually be effectively treated using low power consumption control device, if single Battery powered scene is solely unfavorable for using high-performance processor.

Utility model content

In order to solve these technical problems, the utility model provides a kind of multi-protocols intelligent network based on narrowband Internet of Things It closes.By the way of low-power consumption unit and performance units collaboration, Ethernet operation, man-machine interface and bus module can be met The complicated mission requirements such as extension, also can guarantee the long-term low power operation of system, efficiently solve low work(under multiple application scenarios The tune problem of consumption and high-performance association.

The utility model solve the technical problem the technical solution adopted is that：

A kind of multi-protocols intelligent gateway based on narrowband Internet of Things, which is characterized in that the intelligent gateway includes low-power consumption list First (1) and performance units (2)；The low-power consumption unit (1) includes low power consumption control device (1-1), solar panel (1- 2), for managing the power management module (1-3) of power supply mode and battery status information, believing from cloud server for receiving The NB-IOT modules (1-4) of breath, LoRa modules (1-5) and signal for obtaining scene LoRa nodal informations in local LPWAN Collection modulation module (1-6), wherein low power consumption control device (1-1) respectively with the power management module (1-3), NB-IOT modules (1-4) and LoRa modules (1-5) two-way communication, while the input terminal connection signal collection modulation module (1- of low power consumption control device 6) input terminal of output end, power management module (1-3) is connected with solar panel (1-2)；The power management module There is provided solar powered, accumulator group and direct current supply three kinds of modes；

The performance units (2) include high performance controller (2-1), the RS485 interface moulds for connecting RS485 nodes Block (2-2), the human-machine interface module (2-3) for connecing serial ports of computers or serial port liquid crystal screen, GPS interface module (2-4), number According to memory module (2-5) and ethernet interface module (2-6), wherein high performance controller (2-1) respectively with RS485 interface modules (2-2), human-machine interface module (2-3), data memory module (2-5) and ethernet interface module (2-6) two-way communication；It is high simultaneously The input terminal connection GPS interface module (2-4) of performance controller, the low power consumption control device (1-1) and high performance controller (2- 1) two-way communication；Human-machine interface module connects human-computer interaction interface.

A kind of multi-protocols intelligent gateway implementation method based on narrowband Internet of Things, which is characterized in that low-power consumption unit (1) and Performance units (2) cooperate in the way of high level matches with low level, give tacit consent to low-power consumption unit (1) under scene and run alone, according to more A scene wakes up or suspend mode performance units (2)；

The foundation of low-power consumption unit (1) the control performance units (2) includes power supply mode, battery status information, cloud Hold server info, scene LoRa nodal informations and low power consumption control device operation information.

The operation that the performance units (2) execute after being waken up by low-power consumption unit (1) includes storing mould with data successively Block, human-machine interface module, ethernet interface module, RS485 interface modules, GPS interface module interact.

The control flow of the low power consumption control device (1-1) is：

Step 1：It checks power supply mode and battery status, sets high performance controller (2-1) working method；

Step 2：Judge whether to be direct current supply, if so, low power consumption control device (1-1) wakes up high performance controller (2- 1) it cooperates, sets wake up sign Flag=1, go to step 4；If not direct current supply then goes to step 3；

Step 3：Judge whether accumulator group state is good in power management module (1-3), if so, low power consumption control device (1-1) wakes up high performance controller (2-1) and assists work, setting wake up sign position Flag=1；If accumulator group is out of order, Then low power consumption control device (1-1) sets wake up sign position Flag=0, enters step 4；

Step 4：Control LoRa module (1-5) polls scene LoRa nodes, dissection process protocol massages；

Step 5：The cloud server instruction that processing NB-IOT modules (1-4) receive, instructs according to cloud server Pass scene LoRa nodal informations and signal acquisition data；

Step 6：Detect whether wake up sign position Flag is 1, if wake up sign position Flag is 1, low power consumption control device (1- 1) with high performance controller (2-1) cache exchanging data, step 7 is executed；If wake up sign position Flag is not 1, directly return To step 1；

Step 7：Low power consumption control device updates coordinate and time according to GPS data, updates scene according to RS485 interface data Facility information updates configuration information according to human-computer interaction interface, goes to step 1 later.

Compared with prior art, the utility model has the beneficial effects that：

1. the utility model intelligent gateway is cooperated using low-power consumption unit 1 and performance units 2, wherein low-power consumption list Member 1 handles NB-IOT modules and LoRa network interconnections operation, and it is more that performance units 2 handle Ethernet, RS485, man-machine and GPS etc. A interface module.By way of low power consumption control device and high performance controller co-ordination, low power consumption control under scene is given tacit consent to Device works independently, and fully demonstrates LoRa and NB-IOT network equipments feature low in energy consumption, while can wake up high-performance as needed Controller cooperates, and meets multiple-task demand.

2. the local of the utility model intelligent gateway can reduce use cost, increase by setting up scene LoRa networks Overlay area；Modbus message transmissions are included in LoRa frames, are controlled convenient for industrial equipment；Mobile communication is accessed by NB-IOT Network, convenient for passing through cloud service remote maintenance and status monitoring.

3. the utility model intelligent gateway connects RS485 interface modules just by the controlled high performance controller of working condition In extension Modbus equipment, liquid crystal display is extended by human-machine interface module and is convenient for human-computer interaction, passes through Ethernet interface mould Block connects cloud server, is convenient for high performance applications application, the mode of low-power consumption and high-performance collocation, while answering in view of multiple It with scene demand, can take into account balanced between low-power consumption and high-performance, can both meet low-power consumption scene demand, can also happen suddenly processing Complexity task.

4. performance units acquiescence is operated in dormant state in the utility model implementation method, it is beneficial to reduction system work( Consumption extends battery working time, while waking up ensure the complicated demand of processing on demand.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model intelligent gateway；

Fig. 2 is the system construction drawing of the Internet of Things of the utility model；

Fig. 3 is that the Modbus messages of the utility model embodiment 1 are transmitted in LoRa network readezvous points；

Fig. 4 is that the Modbus messages of the utility model embodiment 1 are transmitted in LoRa protocol conversions；

Fig. 5 is the low power consumption control device flow chart of the utility model.

Specific implementation mode

Below in conjunction with the accompanying drawings and the utility model is further described in embodiment, but not in this, as to this Shen Please protection domain restriction.

Multi-protocols intelligent gateway (abbreviation intelligent gateway, referring to Fig. 1) of the utility model based on narrowband Internet of Things, including it is low Power-consuming elements 1 and performance units 2.Including low-power consumption unit 1 and performance units 2；The low-power consumption unit 1 includes low-power consumption Controller 1-1, it solar panel 1-2, the power management module 1-3 for managing power supply mode and battery status information, uses In receive NB-IOT modules 1-4 from cloud server information, for obtaining scene LoRa nodal informations in local LPWAN LoRa modules 1-5 and signal collection modulation module 1-6, wherein low power consumption control device 1-1 respectively with the power management module 1- 3, NB-IOT modules 1-4 and LoRa modules 1-5 two-way communications, while the input terminal connection signal acquisition conditioning of low power consumption control device The input terminal of the output end of module 1-6, power management module 1-3 is connected with solar panel 1-2；The power management module There is provided solar powered, accumulator group and direct current supply three kinds of modes；

The performance units 2 include high performance controller 2-1, the RS485 interface modules 2- for connecting RS485 nodes 2, the human-machine interface module 2-3, GPS interface module 2-4, data memory module for connecing serial ports of computers or serial port liquid crystal screen 2-5 and ethernet interface module 2-6, wherein high performance controller 2-1 respectively with RS485 interface modules 2-2, human-machine interface module 2-3, data memory module 2-5 and ethernet interface module 2-6 two-way communications；The input terminal connection of high performance controller simultaneously GPS interface module 2-4, the low power consumption control device 1-1 and high performance controller 2-1 two-way communications；Human-machine interface module connects Human-computer interaction interface.

The power management module 1-3 includes accumulator group, photovoltaic controller, voltage regulator circuit and filter circuit；Its In, the input terminal of photovoltaic controller is separately connected accumulator group, solar panel and DC power supply, the output of photovoltaic controller The end connection filtered circuit of voltage regulator circuit is the 1-1 power supplies of low power consumption control device, while photovoltaic controller is low-power consumption control Device 1-1 processed provides power supply mode and accumulator group status information.

The NB-ION modules 1-4, which is received, comes from cloud server information, and LoRa modules 1-5 is for obtaining local LPWAN Interior scene LoRa nodal informations, the low power consumption control device 1-1 analysis cloud server information and scene LoRa nodal informations, root NB-IOT module 1-4 upload informations are controlled according to analysis result to send information to now to cloud server, or control LoRa modules Field LoRa nodes.The support transparent transmission mechanism of LoRa networks 3 and protocol conversion mechanism of LoRa modules and LoRa nodes composition Modbus protocol massages transmit, and the transmission of Modbus agreements is simply easy to implement, at low cost.

The LoRa modules 1-5 is responsible for the establishment and management of network as host, live LoRa nodes as slave not into Row network operation, can be at any time by LoRa module 1-5 suspend mode or wake-up.Single LoRa modules are formed with multiple scene LoRa nodes The wireless transmission of star LoRa networks 3, Modbus protocol massages is established on LoRa communication technologys basis.Using transparent transmission When mechanism, when host and slave transmit Modbus messages, it is only necessary to which complete Modbus protocol massages are encapsulated in LoRa networks MAC layer frame loading section, receiving terminal by frame load parsing after obtain Modbus messages；It, will when using protocol conversion mechanism The addresses Modbus are bound with the equipment DevAddr in LoRa frame heads, and carrying out protocol massages by low power consumption control device 1-1 turns It changes.

The signal collection modulation module includes current acquisition, voltage acquisition and switching value input circuit；The RS485 connects Mouth mold block 2-2 connection RS485 nodes, multiple RS485 nodes and RS485 interface modules 2-2 constitute RS485 networks 4, in RS485 Cascade system extended function module is convenient for using Modbus agreements in network.

The human-machine interface module includes the pins such as RXD, TXD, RTS, CTS, GND and 12V, for connect serial ports of computers or Person's serial port liquid crystal screen by computer terminal software, or by serial port liquid crystal screen, shows human-computer interaction interface, in human-computer interaction Parameter is configured on interface and checks data.The human-computer interaction interface is for showing content comprising visual gateway network The data inventory of configuration interface, the status display interface in gateway data repeating process, appliance control interface and sensing data Storage inquiry interactive interface.

Multi-protocols in the application refer to the various protocols such as LoRa, NB-IOT, Modbus and the TCP of Ethernet transmission, low Power-consuming elements cooperate on demand with performance units autonomous intelligenceization.Under the control of low power consumption control device 1-1, low-power consumption unit 1 It cooperates in the way of high level matches with low level with performance units 2.Low-power consumption unit 1 is run alone under acquiescence scene, according to multiple Scene wakes up or suspend mode performance units 2.The foundation that low-power consumption unit 1 controls performance units 2 includes power supply mode, battery shape State information, cloud server information, scene LoRa nodal informations and low power consumption control device operation information.Performance units 2 are low After power-consuming elements 1 wake up the operation that executes include successively with data memory module, human-machine interface module, ethernet interface module, RS485 interface modules, GPS interface module interact.Low power consumption control device 1-1 control flows comprising following as shown in figure 5, follow Ring executes step：

Step 1：It checks power supply mode and battery status, sets high performance controller 2-1 working methods；

Step 2：Judge whether to be direct current supply, if so, low power consumption control device 1-1 wakes up high performance controller 2-1 associations With work, wake up sign Flag=1 is set, goes to step 4 execution；If not direct current supply then goes to step 3；

Step 3：Judge whether accumulator group state is good in power management module 1-3, if so, low power consumption control device 1- 1, which wakes up high performance controller 2-1, assists work, setting wake up sign position Flag=1；If not, the 1-1 settings of low power consumption control device Wake up sign position Flag=0, enters step 4；

Step 4：Control LoRa module 1-5 polls scene LoRa nodes, dissection process protocol massages；

Step 5：The cloud server instruction that processing NB-IOT modules 1-4 is received, instructs according to cloud server and uploads Live LoRa nodal informations and signal acquisition data；

Step 6：Detect whether wake up sign position Flag is 1, if so, low power consumption control device 1-1 and high performance controller 2- 1, cache exchanging data execute step 7；If not, being returned directly to step 1 execution；

Step 7：Low power consumption control device updates coordinate and time according to GPS data, updates scene according to RS485 interface data Facility information updates configuration information according to human-computer interaction interface, goes to step 1 execution later.

Embodiment 1

In the present embodiment, button is additionally provided in low-power consumption unit, (electric erazable programmable is read-only deposits for band by LED, EEPROM Reservoir), low power consumption control device 1-1 uses STM32L431CCTx microcontrollers, passes through serial line interface USART1 connection NB-IOT moulds Block passes through string by serial line interface USART2 connection LoRa modules by universal serial bus SPI1 connection high performance controller 2-1 Row bus SPI2 connection signal collection modulation modules pass through simulation input pin IN15 and the IN16 monitoring power supplies of simulation input pin Mode and battery status pass through universal serial bus I²The EEPROM of C2 connections, passes through interrupting input pin PB2 and interrupting input pin Button of the PA8 connections for setting low power consumption control device operational mode passes through numeral output pin PB6 and digital output pin PB7 connections LED carries out operating status instruction, controls the power supply to performance units by Multifunctional pin PB8, passes through input pipe The state of foot PB9 monitoring performance units.STM32L431CCTx microcontrollers dynamic adjustment dominant frequency, gives tacit consent to shape in the present embodiment State uses low frequency mode, and dominant frequency as needed is adjusted to 80MHz, by universal serial bus SPI1 with the baud rate of 40Mbits/s with High performance controller 2-1 cache exchanging data.

The signal collection modulation module 1-6 includes exact constant temperature sample circuit, 0.2 times of attenuator circuit, analog-to-digital conversion electricity Road and isolated form SPI interface circuitry.The exact constant temperature sample circuit supports two functions of voltage and current sampling, covering The multiple inputs ranges such as 0~5V, 0~10V, -5V~5V, -10V~+10V, 4mA~20mA, 4mA~24mA and 0mA~24mA, Support a variety of sensing circuits.0.2 times of attenuator circuit can ensure, by the input of maximum magnitude -10V~10V, to be adjusted to -2V ~+2V is conducive to analog to digital conversion circuit and samples.The isolated form SPI interface circuitry is connected with low power consumption control device, can preferably protect Demonstrate,prove data precision and reliability.

The power management module 1-3 include accumulator group, photovoltaic control circuit, voltage regulator circuit, filter circuit and Battery status measuring circuit supports three kinds of solar panel 1-2 power supplies, accumulator group and direct current supply power supply modes, the sun It can charge, low power consumption control device 1-1 can also be powered to accumulator group when energy solar panel and direct current supply, The simulation input pin IN15 and simulation input pin IN16 for connecting low power consumption control device simultaneously, confession is provided for low power consumption control device Electric mode and battery status information.

The NB-IOT modules use BC95, the data transmitting pin TXD1 and data reception pipe foot RXD1 of NB-IOT modules The serial line interface USART1 of low power consumption control device 1-1 is connected, data transmit-receive is used for；NB-IOT modules are indicated by network NETLIGHT and reception ring RI is connected to clear to send pin CTS1 and the request of low power consumption control device serial line interface USART1 It sends pin RTS1 and is used to indicate working condition.In order to reduce power consumption, NB-IOT modules activity, it is shallow sleep and energy saver mode it Preceding free switching.Data transmit-receive is carried out under activity pattern；Shallow sleep pattern can connect network, be waken up by message；Energy saving mould Formula maximum consumption stream is 5 μ A, is waken up by NB-IOT module internal timers or low power consumption control device serial line interface USART1.

The LoRa modules use SX1278 master chip spread spectrum transmissions, the data transmitting pin TXD2 and data of LoRa modules The serial line interface USART2 of pin RXD2 connection low power consumption control devices 1-1 is received, data transmit-receive, clear to send pin CTS2 are used for Pin RTS2 is sent for controlling operating mode with request, and tranmitting data register output pin CK2 is used to indicate working condition.Using height Effect cycle intertexture Error Correction of Coding, maximum continuous error correction 64bit.Pass through online modification baud rate, transmitting-receiving power, channel and aerial speed Rate, flexibly evades interference band and adjustment reception and transmission range saves energy.

The performance units 2 include high performance controller 2-1, RS485 interface module 2-2, human-machine interface module 2-3, GPS interface module 2-4, data memory module 2-5, ethernet interface module 2-6, wherein performance units 2 respectively with it is described RS485 interface modules 2-2, human-machine interface module 2-3, GPS interface module 2-4, data memory module 2-5, Ethernet interface mould Block 2-6 is connected；The low power consumption control device 1-1 is connected with high performance controller 2-1.

The high performance controller 2-1 uses STM32F439VITx microcontrollers, 180MHz dominant frequency clock, industrial ether Network interface and 82 multi-functional IO feet can be competent at the gateway requirement except video processing.Pass through SDIO mouthfuls of connection large capacity SD cards Store historical data extends DataFlash by universal serial bus SPI4 and stores data in this month, passes through universal serial bus I²C1 is stored Parameter is configured, by universal serial bus SPI2 and the low power consumption control device 1-1 cache exchanging data of high performance controller, passes through high property The serial line interface USART1 of energy controller extends human-machine interface module, passes through the serial line interface USART2 extensions of high performance controller RS485 interface modules extend GPS interface mould for cascading Modbus equipment, by the serial line interface USART3 of high performance controller Block obtains changing coordinates and time service.

The RS485 interface modules 2-2 uses isolated form ADM2483BRW chips, is protected by ceramic discharge tube, self- recoverage Dangerous silk, Transient Suppression Diode carry out lightning protection, Anti-surging, a variety of protections of antistatic, and connection RS485 nodes use Modbus agreements Convenient for cascade system extended function module.

The human-machine interface module interface includes the pins such as RXD, TXD, RTS, CTS, GND and 12V, for connecing computer string Mouth or serial port liquid crystal screen can also show human-computer interaction circle by terminal software by serial port liquid crystal screen Face configures parameter and checks data.The human-computer interaction module is for showing content, including the configuration of visual ethernet network Interface, LoRa configuration interfaces, NB-IOT configuration interfaces, status display interface, appliance control interface and sensing data data Library storage inquires interactive interface.

Fig. 2 is the Internet of things system structure chart that the multi-protocols intelligent gateway of this implementation is constituted.Intelligent gateway passes through Ethernet Interface module 2-6 is connect with the wired high speed of cloud server, or passes through NB-IOT modules 1-4 and cloud server wireless remote Connection, by human-machine interface module 2-3 connection PC end softwares or serial port liquid crystal screen, by RS485 interface modules 2-2 to cascade Mode connect RS485 nodes and set up RS485 networks 4, scene LoRa node groups are connected by LoRa modules 1-5 in a star fashion Build LoRa networks 3.NB-IOT modules 1-4, which is received, comes from cloud server information, and LoRa modules 1-5 is for obtaining local LPWAN Interior scene LoRa nodal informations, low power consumption control device 1-1 analysis cloud server information and scene LoRa nodal informations, according to dividing It analyses output control NB-IOT module 1-4 upload informations and send information to scene to cloud server, or control LoRa modules LoRa nodes.

The LoRa networks 3 are Gateway with LoRa modules, and LoRa nodes are End-device (terminal device), are set up Star network supports Modbus agreements.The LPWAN that LoRa modules are formed with LoRa nodes is in a manner of Modbus protocol massages RTU Transparent transmission mechanism and protocol conversion mechanism are supported in transmission.The LoRa modules 1-5 is responsible for the establishment and management of network as host, With the live LoRa nodes as slave without network operation, live LoRa nodes can suspend mode at any time or wake-up.LoRa nets Network 3 supports Modbus transparent transmissions mechanism and protocol conversion mechanism, and the wireless transmission of Modbus protocol massages is established leads in LoRa Believe on technical foundation.

LoRa modules are supported explicitly and implicit two kinds of data packet formats, the message of actual transmissions include ordering also to have data, It needs to use variable-length data package format.Explicit header pattern is the operation mode of acquiescence, in such a mode, PHY frame heads Include that the payload length indicated with byte number and FEC forward error corrections code check and optional 16 PHY frame heads verify.PHY The length of payload is defined in PHY frame heads, and has certain forward error correction FEC functions, is verified by PHY frame heads, can be with Differentiate whether received LoRa frames are complete, receiver is allow to abandon invalid header, saves controller resource.

As shown in figure 3, when the LoRa networks use transparent transmission mechanism, LoRa modules are transmitted with scene LoRa nodes Modbus messages, it is only necessary to complete Modbus protocol massages be encapsulated in the PHY loading sections of LoRa frames, by Modbus messages CRC check part correspond to the load checkings of LoRa frames.The LoRa modules or scene LoRa nodes for receiving frame, frame is loaded Complete Modbus messages are obtained after parsing.Be further processed the address for parsing Modbus messages again, function code, data and CRC check position.

As shown in figure 4, when the LoRa networks use protocol conversion mechanism, low power consumption control device 1-1 needs to preserve DevAddr mapping tables in the addresses Modbus and LoRa frames, the addresses Modbus and the device id in LoRa frame heads are bound, LoRa nodes only need to preserve the addresses LoRa, and protocol massages conversion is carried out by low power consumption control device 1-1.

Low power consumption control device receives Modbus network messages, address code in Modbus messages is read, in DevAddr mapping tables It is interior to search corresponding ID and LoRa node address, CRC check is corresponded into LoRa frame load checkings, the function of Modbus messages The mac layer frame load that code and data are encapsulated into LoRa frames is sent.Low power consumption control device receives LoRa frames, according to DevAddr Mapping table inquires address code, loads abstraction function code from the frame in MAC loads and data are reverted in conjunction with load checking Modbus messages carry out next step operation according to Modbus messages.

The scenes End-device LoRa nodes in LoRa networks support energy saver mode Class A, low latency pattern Class B and non-delayed mode Class C, the LoRa modules for serving as Gateway are constantly in working condition.The LoRa netinit stages Live LoRa nodes are operated in Class C modes, and using protocol conversion mechanism, DevAddr, NwkSKey are obtained establishing network With Class mode As are switched to after AppSKey, using transparent transmission mechanism.At this point, communication is initiated in LoRa nodes timing in scene Uplink, LoRa module completed in setting time window Downlink send include Modbus messages LoRa frames, complete and The MESSAGE EXCHANGE of live LoRa nodes.

The utility model does not address place and is suitable for the prior art.

Claims (5)

1. a kind of multi-protocols intelligent gateway based on narrowband Internet of Things, which is characterized in that the intelligent gateway includes low-power consumption unit （1）And performance units（2）；The low-power consumption unit（1）Including low power consumption control device（1-1）, solar panel（1-2）、 Power management module for managing power supply mode and battery status information（1-3）, for receive come from cloud server information NB-IOT modules（1-4）, LoRa modules for obtaining scene LoRa nodal informations in local LPWAN（1-5）It is adopted with signal Collect conditioning module（1-6）, wherein low power consumption control device（1-1）Respectively with the power management module（1-3）, NB-IOT modules （1-4）With LoRa modules（1-5）Two-way communication, while the input terminal connection signal collection modulation module of low power consumption control device（1- 6）Output end, power management module（1-3）Input terminal and solar panel（1-2）It is connected；The power management module There is provided solar powered, accumulator group and direct current supply three kinds of modes；

The performance units（2）Including high performance controller（2-1）, RS485 interface modules for connecting RS485 nodes （2-2）, human-machine interface module for connecing serial ports of computers or serial port liquid crystal screen（2-3）, GPS interface module（2-4）, data Memory module（2-5）And ethernet interface module（2-6）, wherein high performance controller（2-1）Respectively with RS485 interface modules （2-2）, human-machine interface module（2-3）, data memory module（2-5）And ethernet interface module（2-6）Two-way communication；It is high simultaneously The input terminal of performance controller connects GPS interface module（2-4）, the low power consumption control device（1-1）With high performance controller（2- 1）Two-way communication；Human-machine interface module connects human-computer interaction interface.

2. the multi-protocols intelligent gateway according to claim 1 based on narrowband Internet of Things, which is characterized in that the power supply pipe Manage module（1-3）Including accumulator group, photovoltaic controller, voltage regulator circuit and filter circuit；Wherein, photovoltaic controller is defeated Enter end and be separately connected accumulator group, solar panel and DC power supply, the output end connection voltage of photovoltaic controller adjusts electricity The filtered circuit in road is low power consumption control device（1-1）Power supply, while photovoltaic controller is low power consumption control device（1-1）It provides and supplies Electric mode and accumulator group status information.

3. the multi-protocols intelligent gateway according to claim 1 based on narrowband Internet of Things, which is characterized in that the human-machine interface Mouth mold block includes RXD, TXD, RTS, CTS, GND and 12V pin, and the human-computer interaction interface includes that visual gateway network is matched Set interface, the status display interface in gateway data repeating process, appliance control interface and sensing data database purchase Inquire interactive interface.

4. the multi-protocols intelligent gateway according to claim 1 based on narrowband Internet of Things, which is characterized in that the signal is adopted It includes current acquisition, voltage acquisition and switching value input circuit to collect conditioning module.

5. the multi-protocols intelligent gateway according to claim 1 based on narrowband Internet of Things, which is characterized in that the high-performance Controller uses STM32F439VITx microcontrollers, low power consumption control device to use STM32L431CCTx microcontrollers.