CN107196707A - Distributed light-carried wireless WiFi ZigBee-networks - Google Patents
Distributed light-carried wireless WiFi ZigBee-networks Download PDFInfo
- Publication number
- CN107196707A CN107196707A CN201710375387.2A CN201710375387A CN107196707A CN 107196707 A CN107196707 A CN 107196707A CN 201710375387 A CN201710375387 A CN 201710375387A CN 107196707 A CN107196707 A CN 107196707A
- Authority
- CN
- China
- Prior art keywords
- distributed
- zigbee
- wifi
- light
- wireless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
The present invention discloses a kind of distributed light-carried wireless WiFi Zigbee networks, including：Light-carried wireless exchange system, distributed host and some distributed slaves, are communicated between the light-carried wireless exchange system and distributed host by WiFi module, are communicated between the distributed host and distributed slave by Zigbee wireless modules.The present invention enters row data communication with distributed slave using effectively 50~200 meters of the covering of Zigbee wireless communication techniques, distributed main frame by Zigbee protocol；Data are further transmitted to light-carried wireless exchange system by distributed host by WiFi again.Because WiFi access points can concentrate on control room, the distributed slave of multiple spot can be then accessed by WiFi, and slave is as a result of Zigbee communication technology, i.e. without each slave WiFi communication, reduce cost, the function of being inquired about and communicated by the short address of two bytes is realized using Zigbee protocol in addition, the reliability, security and flexibility of system is effectively improved, realizes the collection of distributed data.
Description
Technical field
The present invention relates in industry control technical field, more particularly to a kind of WiFi radio over fiber exchange system based on 2.4GHz
Zigbee master-slave distributed networks.
Background technology
Traditional industrial communication mode --- fieldbus, have that transmission range is short, interoperability is poor, transmission rate is low,
The shortcomings of needing manual routing.Therefore, in order to realize the unattended and remote control of production scene, find a kind of convenient effective
Mode solves the above problems, then the trend developed as technology.
One Publication No. CN103200702A Chinese invention patent application disclose a kind of distributed light-carried wireless-
WiFi-Modbus networks, including：Light-carried wireless exchange system, Modbus main frames and at least two Modbus slaves；The light is carried
Carried out between radio exchange system and Modbus main frames, between the Modbus main frames and Modbus slaves by radiating antenna wireless
Communication；Communication mode between foregoing Modbus main frames and Modbus slaves is to carry out nothing by the radiofrequency signal of wireless communication module
Line communicates；The light-carried wireless exchange system includes central station and fiber links, be connected to central station and remote radio unit (RRU) it
Between optical fiber link be used for realizing the distributions of WiFi radio frequency signals, central station is used for carrying out signal exchange, control and handled,
Remote radio unit (RRU) is used for realizing opto-electronic conversion and radio-frequency power amplification.The distributed light-carried wireless that the patent application is proposed-
WiFi-Modbus networks, realize the wireless collection and centralized management of terminal data, and network environment build it is flexible, safe, can
Lean on.But when a certain WiFi-Modbus main frame breaks down, substantial amounts of Modbus slaves can be caused to work, serious shadow
The normal work of whole network is rung, the maintenance management in network later stage is extremely onerous.
The content of the invention
For problems of the prior art, it is an object of the invention to propose a kind of network stabilization, healthy and strong distribution
Formula light-carried wireless-WiFi-Zigbee networks.
To realize the purpose, the present invention is adopted the following technical scheme that：
Distributed light-carried wireless-WiFi-Zigbee networks in the present invention, it is characterised in that including：Light-carried wireless is exchanged
System, distributed host, distributed slave (some), Zigbee wireless modules, WiFi module.
Described light-carried wireless exchange system combination light-carried wireless technology and WiFi (Wireless Fidelity, wireless guarantor
True technology) WiMAX local area network technology, utilize central station (CS, Central Station) and telepoint base station (BS, Base
Station the optical fiber link between) realizes the distribution of WiFi less radio-frequencies (RF, Radio Frequency) signal, and signal is handed over
Change, control and processing module all concentrates on central station (CS), telepoint base station (BS) only realizes opto-electronic conversion and radio-frequency power amplification
Function.So, complicated, expensive equipment is focused on into central site, allows multiple telepoint base stations to share these equipment, so as to reduce
The power consumption and cost of base station, improve the reliability and security of system, while frequency can be realized using light-carried wireless exchange system
Compose the dynamically distributes of bandwidth resources.
Described distributed host is by hardware such as microprocessor, Zigbee wave points, WiFi network interface, I/O interfaces
And software systems are constituted.Distributed host realizes the communication of main frame and light-carried wireless exchange system by WiFi network interface；Point
Cloth main frame realizes distributed host to the control of distributed slave and the collection of data by Zigbee wave points；It is distributed
Main frame realizes wireless data transmission by I/O Interface Controller Zigbee wireless modules and WiFi module, complete data transmitting-receiving and
The display of state；Software systems include Software in Single Chip Microcomputer Control and application software, and single-chip computer control system is wireless comprising main frame
Zigbee (Z-Stack) agreement, application software has the work(such as host computer sensor data acquisition system, WiFi module configuration system
Energy.
Described distributed slave is by hardware and softwares such as microprocessor, memory, Zigbee wave points, I/O interfaces
System is constituted.Distributed slave realizes the real-time Communication for Power of distributed host and distributed slave by Zigbee wave points, complete
Into the order of distributed host；Distributed slave realizes wireless data transmission by I/O Interface Controller Zigbee wireless modules, complete
Into the transmitting-receiving and the display of state of data；Software systems include distributed slave wireless Zigbee (Z-Stack) agreement.
The Zigbee wireless modules exempt from licensing using the free ISM bands of 2.4GHz, and maximum transmitted digit rate reaches
200Kbps, and can software modification baud rate, open ground transmission range reaches 200 meters, with the functions such as wireless awakening, sensitivity
- 90dBm is reached, reliability is high, can be widely applied to short-distance wireless communication field (such as radio meter register, industry of various occasions
Remote control, low-power consumption handheld device etc.).Wireless data transmission is realized based on Zigbee wireless modules, reliability is improved.
The WiFi module is a kind of transmission modular converter that serial ports or Transistor-Transistor Logic level turn WIFI communications, Uart-WiFi modules
It is the flush bonding module for meeting WiFi wireless network standards based on Uart interfaces, built-in wireless network protocol IEEE802.11 associations
Stack and ICP/IP protocol stack are discussed, user's serial ports or Transistor-Transistor Logic level data can be realized to the conversion between wireless network.According to master
The hardware circuit design of controller, it is possible to achieve Zigbee and WiFi mutual conversion, so that flexible access is distributed
Light-carried wireless WiFi network.
The course of work is described：
Put up required hardware environment before work, including the building of radio over fibre system, distributed wireless Zigbee master
The building of slave system, terminal acquisition system are built (Temperature Humidity Sensor, gas sensor, human body sensor etc.).
System initialization work when, distributed host configured the parameter of each register, the parameter of WiFi module,
Parameter of Zigbee wireless modules etc., distributed slave has configured the parameter of each register, the parameter of Zigbee wireless modules
Deng.To ensure that communication is normally carried out, the distal end WiFi network of light-carried wireless exchange system and the WiFi of distributed host need to be set
Module has identical SSID (network name), authentication password, working channel, mode of operation etc.；Distributed host with it is distributed from
The parameters such as the network ID of machine Zigbee wireless modules and channel are consistent.
WiFi signal is covered distal end distributing antenna system by control centre by light-carried wireless exchange system, distributed
The WiFi module of main frame is connected in distributed system, and distributed host is responsible for WiFi signal being converted to Zigbee wireless signals hair
It is shot out, such control centre sends instruction, through light-carried wireless exchange system again by the WiFi module of distributed host, by its turn
It is changed to Zigbee wireless signals and is sent to distributed slave, distributed slave will be instructed by RS232/RS485 serial line interfaces again
Send to various terminals sensor, corresponding control and the collection of data are completed to sensor, sensor is in the same way
By the data of collection back to control centre, it is achieved thereby that the network coverage at a high speed, flexibly, safe, completes the nothing of data
Line collection, control and management.
The beneficial effects of the invention are as follows：
In existing industrial control network technology, there is not the distributed light-carried wireless-WiFi- using the present invention
What Zigbee network system was realized.Distributed light-carried wireless-WiFi-Zigbee network technologies and the theory category of the present invention is pioneering.
The present invention is applied in various industrial productions, economical, convenient, and the interoperability of product is good, is greatly reduced artificial
Arrangement communication line and shared and long-range Centralized Monitoring and the management for realizing resource well, to further improving whole work
The integrated level and automaticity in control field have positive meaning.
In the present invention using effectively 50~200 meters of the covering of Zigbee wireless communication techniques, distributed main frame and distribution
The slave of formula enters row data communication by Zigbee protocol；Data are further transmitted to light by WiFi again and carried by distributed host
Radio exchange system.Because WiFi access points can concentrate on control room, then the distributed slave of multiple spot can be accessed by WiFi,
And slave, that is, without each slave WiFi communication, reduces cost, used in addition as a result of Zigbee communication technology
Zigbee protocol realizes the function of being inquired about and communicated by the short address of two bytes, be effectively improved system reliability,
Security and flexibility, realize the collection of distributed data.
Compared with distributed light-carried wireless-WiFi-Modbus networks, distributed light-carried wireless-WiFi-Zigbee networks tool
Standby network heals function automatically.In general distributed light-carried wireless-WiFi-Zigbee network applications, a light-carried wireless
Exchange system can carry many WiFi-Zigbee main frames, and each WiFi-Zigbee main frame can also carry one or more
Zigbee slaves.If a certain ZigBee slave is in the overlapping network coverage of two WiFi-ZigBee main frames, when
Wherein one WiFi-ZigBee main frame is because certain factor causes to damage, it is impossible to which during normal work, the Zigbee is automatic from chance
The Zigbee network of another WiFi-Zigbee main frame is accessed, without carrying out any artificial adjustment configuration, net is substantially increased
The stability and robustness of network, are easy to the maintenance and management of later stage network.
Brief description of the drawings
Fig. 1 is distributed light-carried wireless-WiFi-Zigbee Principles of Network block diagrams.
Fig. 2 is the theory diagram of distributed slave.
Fig. 3 is the theory diagram of distributed host.
Fig. 4 distribution light-carried wireless-WiFi-Zigbee network-based control software flow patterns.
Embodiment
The present invention is further described with exemplary embodiment below in conjunction with the accompanying drawings, identical label wherein in accompanying drawing
All refer to identical part.In addition, if it is known that the detailed description of technology is for showing the invention is characterized in that unnecessary
, then omitted.
As shown in figure 1, a kind of distributed light-carried wireless-WiFi-Zigbee networks include：Light-carried wireless exchange system 1, point
Cloth main frame 2, distributed slave 3 (some), Zigbee wireless modules, WiFi moulds.
Wherein, light-carried wireless exchange system 1 be with reference to light-carried wireless technology and WiFi (Wireless Fidelity, wirelessly
Fidelity technology) WiMAX local area network technology, utilize central station (CS, Central Station) and telepoint base station (BS, Base
Station the optical fiber link between) realizes the distribution of WiFi less radio-frequencies (RF, Radio Frequency) signal, and signal is handed over
Change, control and processing module all concentrates on central station (CS), telepoint base station (BS) only realizes opto-electronic conversion and radio-frequency power amplification
Function.
Radiating antenna 101,201 is the radiating antenna of WiFi module, is operated in 2.4GHz frequency ranges, receives and dispatches WiFi less radio-frequencies
Signal.
Radiating antenna 211,301 is the radiating antenna of ZigBee wireless modules, is operated in 2.4GHz frequency ranges, transmitting-receiving 2.4G without
Line radiofrequency signal.
Dotted line represents that slave can be 1~255.
As shown in Fig. 2 the distributed slave 3 is by Zigbee module 304, microprocessor 303, RS232/RS485 modules
305th, power module 302, interface 306 are constituted, and are realized and are gathered external signal by RS232/RS485 modules 305 and interface 306,
Communicated by Zigbee module 304 with distributed host, and data according to Z-Stack protocol processes.
Power module 302 is provides power supply to distributed slave, and it is operated in 0.7V~5.5V, 200mA.Solid line 307 is
Power module provides power supply to the other circuits of slave.Microprocessor 303 is by hardware and software systems such as built-in storage, I/O interfaces
Constitute.Real bidirectional lines 308 is that microprocessor carries out half-duplex communication line with Zigbee wireless modules.Zigbee wireless modules
304 exempt from licensing using the free ISM bands of 2.4GHz, and maximum transmitted digit rate reaches 200Kbps, and can software modification baud rate, open
Wealthy ground transmission range reaches 200 meters, with functions such as wireless awakenings, and sensitivity reaches -90dBm, and transmission power is to the maximum
10dBm.Radiating antenna 301 is operated in 2.4GHz frequency ranges, receives and dispatches Zigbee radio frequency signals.Real bidirectional lines 309 is microprocessor
Device and RS232/RS485 half-duplex communication lines.RS232/RS485 modules 305 are the Transistor-Transistor Logic level and external interface of microprocessor
RS232/RS485 level provides transformation.Real bidirectional lines 310 is external equipment and RS232/RS485 half-duplex communication lines.
Interface 306 is the interface for the RS232/RS485 being connected with external equipment.
As shown in figure 3, the distributed host 2 includes：WiFi module 205, Zigbee module 204, microprocessor 203,
Power module 202, realizes the conversion of WiFi signal and Zigbee signals, and data according to Z-Stack protocol processes.
Real bidirectional lines 208 is that microprocessor carries out half-duplex communication line with Zigbee wireless modules 204.Zigbee is wireless
Module 204 exempts from licensing using the free ISM bands of 2.4GHz, and maximum transmitted digit rate reaches 200Kbps, and can software modification baud
Rate, open ground transmission range reaches 200 meters, with functions such as wireless awakenings, and sensitivity reaches -90dBm, and transmission power is to the maximum
10dBm.Radiating antenna 211 is operated in 2.4GHz frequency ranges, receives and dispatches Zigbee radio frequency signals.
Real bidirectional lines 209 is that microprocessor carries out half-duplex communication line with WiFi module 205.WiFi module 205 is string
Mouth or Transistor-Transistor Logic level turn a kind of transmission modular converter of WiFi communication, and Uart-WiFi modules are to meet WiFi based on Uart interfaces
The flush bonding module of wireless network standards, built-in wireless network protocol IEEE802.11 protocol stacks and ICP/IP protocol stack, energy
Enough realize user's serial ports or Transistor-Transistor Logic level data to the conversion between wireless network.WiFi module, which is mainly, in the present invention passes through
IEEE802.11 protocol stacks to communicate between light-carried wireless exchange system and distributed host.Radiating antenna 201 is operated in
2.4GHz frequency ranges, receive and dispatch WiFi radio frequency signals.
Power module 202 is provides power supply to distributed host, and it is operated in 5.0V~10V, 500mA.Solid line 207 is electricity
Source module provides power supply to the other circuits of distributed host.Microprocessor 203, by hardware and softwares such as built-in storage, I/O interfaces
System is constituted.
As shown in figure 4, during system initialization, distributed host has configured the parameter of each register, WiFi module
Parameter, parameter of Zigbee wireless modules etc., distributed slave have configured the parameter of each register, Zigbe wireless modules
Parameter etc..To ensure that communication is normally carried out, the distal end WiFi network and distributed host of light-carried wireless exchange system need to be set
WiFi module has identical SSID (network name), authentication password, working channel, mode of operation etc.；Distributed host and distribution
The parameters such as the network number of the Zigbee wireless modules of formula slave and channel are consistent.
Distributed host has monitored whether that data issue distributed host, is first placed the data into if data are received slow
Deposit, do not continue whether monitoring distributed main frame receives data then.
Distributed host judges that data are sent by WiFi from light-carried wireless exchange system after receiving data
Or other manner is sent to distributed host, if so distributed host for sending of light-carried wireless exchange system according to
Custom protocol parses data and again according to being sent to distributed slave by Zigbee automatically with agreement.
If it is not that the data received from light-carried wireless exchange system are so judged as number that distributed host, which receives data,
According to whether be from Zigbee module receive data, if it is then according to Z-Stack protocol analysis data and data according to
Z-Stack agreements are sent to light-carried wireless exchange system by WiFi, then proceed to whether monitoring distributed main frame receives number
According to；If not then continuing whether monitoring distributed main frame receives data.
If distributed slave receives Zigbee data, then distributed slave is according to Z-Stack protocol analysis data
And according to Z-Stack protocol processes data, can read outside RS232/RS485 data etc., then data are passed through again
Zigbee module is sent to distributed host.
Although having been illustrated with some exemplary embodiments of the present invention above, those skilled in the art will manage
Solution, in the case where not departing from the principle or spirit of the present invention, can make a change to these exemplary embodiments, of the invention
Scope is limited by claim and its equivalent.
Claims (5)
1. distributed light-carried wireless-WiFi-Zigbee networks, it is characterised in that including：Light-carried wireless exchange system, distribution
Main frame and some distributed slaves, are led between the light-carried wireless exchange system and distributed host by WiFi module
Letter, is communicated between the distributed host and distributed slave by Zigbee wireless modules.
2. distributed light-carried wireless-WiFi-Zigbee networks according to claim 1, it is characterised in that the light carries nothing
Line exchange system includes central station and telepoint base station, is connected between central station and telepoint base station by optical fiber link, signal exchange,
Control and processing module all concentrate on central station, and telepoint base station only realizes opto-electronic conversion and radio-frequency power enlarging function.
3. distributed light-carried wireless-WiFi-Zigbee networks according to claim 1, it is characterised in that the distribution
Main frame includes：Microprocessor, Zigbee wave points, WiFi network interface, I/O interfaces, microprocessor are connect by WiFi network
The communication of the existing main frame of cause for gossip and light-carried wireless exchange system, microprocessor realizes distributed host pair by Zigbee wave points
The control of distributed slave and the collection of data；Microprocessor passes through I/O Interface Controller Zigbee wireless modules and WiFi module
Realize wireless data transmission.
4. distributed light-carried wireless-WiFi-Zigbee networks according to claim 1, it is characterised in that described distribution
Formula slave includes：Microprocessor, memory, Zigbee wave points, I/O interfaces, microprocessor pass through Zigbee wave points
The real-time Communication for Power of distributed host and distributed slave is realized, the order of distributed host is completed, microprocessor passes through I/O interfaces
Control Zigbee wireless modules realize wireless data transmission, and microprocessor is received or information to be sent by memory storage.
5. distributed light-carried wireless-WiFi-Zigbee networks according to claim 1, it is characterised in that the distribution
The quantity of slave is 1-255.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710375387.2A CN107196707B (en) | 2017-05-24 | 2017-05-24 | Distributed radio over fiber-WiFi-ZigBee network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710375387.2A CN107196707B (en) | 2017-05-24 | 2017-05-24 | Distributed radio over fiber-WiFi-ZigBee network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107196707A true CN107196707A (en) | 2017-09-22 |
| CN107196707B CN107196707B (en) | 2020-01-31 |
Family
ID=59875980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710375387.2A Active CN107196707B (en) | 2017-05-24 | 2017-05-24 | Distributed radio over fiber-WiFi-ZigBee network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196707B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844444A (en) * | 2017-10-31 | 2018-03-27 | 广东电网有限责任公司电力科学研究院 | A kind of device for mutually turning Wifi and various communication interfaces |
| CN111009107A (en) * | 2019-11-12 | 2020-04-14 | 南京四象新能源科技有限公司 | Distributed energy storage control system and control method based on Zigbee communication |
| CN111328257A (en) * | 2020-03-11 | 2020-06-23 | 广东省电信规划设计院有限公司 | Data synchronization method and device for upper computer and lower computer |
| CN112466108A (en) * | 2020-12-19 | 2021-03-09 | 爱克斯维智能科技(苏州)有限公司 | Engineering machinery beyond-visual-range remote control method and system thereof |
| CN112911725A (en) * | 2021-01-06 | 2021-06-04 | 上海擎昆信息科技有限公司 | Wireless distributed sensing and control method, device and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070292137A1 (en) * | 2006-06-16 | 2007-12-20 | Michael Sauer | Redundant transponder array for a radio-over-fiber optical fiber cable |
| US20130091250A1 (en) * | 2011-10-06 | 2013-04-11 | Electronics And Telecommunications Research Institute | Intermediate node apparatus for configuring sensor network and sensor data processing method using intermediate node apparatus |
| CN103200702A (en) * | 2013-03-21 | 2013-07-10 | 广州飞瑞敖电子科技有限公司 | Distributed type ratio-over-fiber-wireless fidelity (WiFi)-Modbus network |
| CN203167301U (en) * | 2013-02-28 | 2013-08-28 | 杭州鸿雁电器有限公司 | Gatewayconverting WiFi to ZigBee |
| CN103970076A (en) * | 2013-01-30 | 2014-08-06 | 张永生 | Large-volume deposit concrete cooling water intelligent control system |
-
2017
- 2017-05-24 CN CN201710375387.2A patent/CN107196707B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070292137A1 (en) * | 2006-06-16 | 2007-12-20 | Michael Sauer | Redundant transponder array for a radio-over-fiber optical fiber cable |
| US20130091250A1 (en) * | 2011-10-06 | 2013-04-11 | Electronics And Telecommunications Research Institute | Intermediate node apparatus for configuring sensor network and sensor data processing method using intermediate node apparatus |
| CN103970076A (en) * | 2013-01-30 | 2014-08-06 | 张永生 | Large-volume deposit concrete cooling water intelligent control system |
| CN203167301U (en) * | 2013-02-28 | 2013-08-28 | 杭州鸿雁电器有限公司 | Gatewayconverting WiFi to ZigBee |
| CN103200702A (en) * | 2013-03-21 | 2013-07-10 | 广州飞瑞敖电子科技有限公司 | Distributed type ratio-over-fiber-wireless fidelity (WiFi)-Modbus network |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844444A (en) * | 2017-10-31 | 2018-03-27 | 广东电网有限责任公司电力科学研究院 | A kind of device for mutually turning Wifi and various communication interfaces |
| CN111009107A (en) * | 2019-11-12 | 2020-04-14 | 南京四象新能源科技有限公司 | Distributed energy storage control system and control method based on Zigbee communication |
| CN111328257A (en) * | 2020-03-11 | 2020-06-23 | 广东省电信规划设计院有限公司 | Data synchronization method and device for upper computer and lower computer |
| CN111328257B (en) * | 2020-03-11 | 2022-03-22 | 广东省电信规划设计院有限公司 | Data synchronization method and device for upper computer and lower computer |
| CN112466108A (en) * | 2020-12-19 | 2021-03-09 | 爱克斯维智能科技(苏州)有限公司 | Engineering machinery beyond-visual-range remote control method and system thereof |
| CN112911725A (en) * | 2021-01-06 | 2021-06-04 | 上海擎昆信息科技有限公司 | Wireless distributed sensing and control method, device and system |
| CN112911725B (en) * | 2021-01-06 | 2023-03-03 | 上海擎昆信息科技有限公司 | Wireless distributed sensing and control method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107196707B (en) | 2020-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107196707A (en) | Distributed light-carried wireless WiFi ZigBee-networks | |
| CN207184521U (en) | Internet of Things Multifunctional gateway based on NB IoT | |
| CN104796309A (en) | Intelligent home networking equipment and control method | |
| CN206517411U (en) | A kind of dual-mode communication system wireless based on power line carrier and micropower | |
| CN105225449A (en) | Supervisory system and monitoring collector | |
| CN110648437A (en) | Entrance guard management system based on LoRa thing networking | |
| CN204598417U (en) | A kind of Novel intelligent lighting power-supply device | |
| CN208768305U (en) | A kind of remote transport gateway based on LoRa technology | |
| CN107872271A (en) | Public network communication relays and communication means based on LoRa technologies | |
| CN105554917A (en) | Internet of Things access module | |
| CN104410656A (en) | A smart home system controlled through web | |
| CN207530847U (en) | RFID intelligent gateway devices | |
| CN103823775A (en) | Serial port and Internet port smart converter | |
| CN211294145U (en) | Module based on low-power-consumption multi-communication-mode integration | |
| CN206948633U (en) | A kind of wireless networking management equipment in taiwan area identification | |
| CN105955902A (en) | Serial-to-wireless communicator | |
| CN107682175B (en) | Remote management control method and system based on LPWAN technology | |
| CN106685667A (en) | Zigbee wireless transmission and conversion device based on RS232 interface | |
| CN202183766U (en) | Base station/relay universal device in ISM communication | |
| CN209980043U (en) | Thing networking intelligent terminal data acquisition wireless transmission device | |
| CN211019251U (en) | Zigbee-based underground operation personnel positioning system | |
| CN107864003A (en) | A kind of public network repeater that communication is realized with LoRa wireless technologys | |
| CN103200702A (en) | Distributed type ratio-over-fiber-wireless fidelity (WiFi)-Modbus network | |
| CN203261488U (en) | RFID application-oriented wireless access point of Internet of Things | |
| CN206452393U (en) | A kind of Zigbee based on RS232 interfaces is wirelessly transferred conversion equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |