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What's the difference between an industrial wireless... Terminal devices have different data access interfaces Wireless router provides one network interface of data access, terminal equipment need only with the network IP address as a gateway to the IP address of the terminal device must use specified or specify the IP address in the address period, and specify the IP address...

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VRRP function on industrial grade router VRRP is a selection protocol that dynamically assigns the responsibilities of a virtual router to one of the VRRP routers on the LAN. The VRRP router, which controls the virtual router's IP address, is called the master router and it forwards packets to these virtual IP addresses. Once the primary router is unavailable,...

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工业网关的功能组成 网关(Gateway)又称网间连接器、协议转换器。网关在网络层以上实现网络互连,是最复杂的网络互连设备,仅用于两个高层协议不同的网络互连。网关既可以用于广域网互连,也可以用于局域网互连。 网关是一种充当转换重任的计算机系统或设备。使用在不同的通信协议、数据格式或语言,甚至体系结构完全不同的两种系统之间,网关是一个翻译器。与网桥只是简单地传达信息不同,网关对收到的信息要重新打包,以适应目的系统的需求。 4G工业网关的基本功能是连接两个异构网络,这在工业物联网场景中尤为常见,因为传感器网络经常使用完全不同于普通网络层(长距离传输网络)的电信号和协议。   4G工业网关功能组成   网络层信号接口 它主要承担网络层信号的对接任务。与感知层信号接口相比,网络层信号接口一般简单得多,因为通常整个系统只需要一个标准的长途网络及其协议,因此相应的硬件接口和数据收发软件相对简单。然而,这并不是说它只能支持一种类型。在实际应用中,工业网关的制造商通常被设计为支持多种形式的长途网络,以实现产品的通用性。特定的表单可以是同时配置多个接口的方式,也可以以配置插件卡的形式设计产品,以便用户可以在离开工厂时选择要配置的不同配置。   传感层信号接口 主要负责传感器网络中各设备信号的对接工作。该模块包括用于不同电信号对接的硬件接口,以及相应的数据采集和指令发送软件。为了解决感知层的复杂性,工业网关厂商将根据各自的目标应用领域,装备感知层信号接口的硬件接口和协议组合。   就地数据库 在一些用于复杂数据处理流程或其他就地业务逻辑处理的场景中,处理后的数据还需要存储在网关本地数据库中。由于工业网关一般属于嵌入式计算设备,所以这类数据库也一般采用嵌入式数据库。嵌入式数据库功能简单,具有内存缓冲,提高了访问速度。   就地的业务逻辑 它主要处理与网关相关的传感器网络部分所连接的设备、传感器和执行器相关的本地系统的业务逻辑。不同网关的本地业务逻辑模块的丰富性和复杂性差异很大。如果工业网关中没有这样的功能模块,它通常被称为数据传输网关、协议转换器或通信管理器。有关就地业务逻辑的详细描述,请参见边缘计算。   数据处理 设备端数据处理主要解决数据不匹配问题。也就是说,服务器所需数据的范围、频率、完整性等等。数据处理的目的是对输入接口中的数据进行排序,将其转换为适合输出的数据形式,并将其推送到输出接口。输入端和输出端可以由设备端或服务器端播放,因此数据流是双向的,并且根据数据类型的不同而不同。   其他功能 除了上面的主要模块之外,网关还常常配置它的功能用户界面,要么使用按钮、命令行(通过Telnet或串口),要么使用图形界面(例如内置的WEB服务器,甚至面板)。如果网关具有适当的业务逻辑,它可能还需要工具来加载脚本文件、配置文件,等等,这些都是本地业务逻辑所需要的。 作为一种远程设备,4G工业网关的自我维护也非常重要。一般情况下,需要利用自己与服务器连接的优势,从服务器上自动下载自己的软件更新包并完成更新。还应通过远程登录完成部分设置和配置工作,以降低外派人员的现场维护成本,提高对用户需求的响应速度。

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Functional composition of 4G industrial gateway The basic function of the 4G industrial gateway is to connect the two heterogeneous networks, which is particularly common in the industrial Internet of things scenario, because the sensor network often USES completely different electrical signals and protocols from the common network layer (long distance transmission network).   4G...

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网关和路由器之间的区别 网关是充当转换代理的计算机系统或设备。网关是两个系统之间的转换器,它们使用不同的通信协议,数据格式或语言,甚至是完全不同的体系结构。与简单传达信息的网桥不同,网关重新打包它们收到的信息以满足预期系统的需要。那么网关和路由器之间的区别是什么? 网关和路由器之间的区别如下: 路由器的作用是连接不同的网络并传输信息。根据用途,可分为:接入,企业级,骨干级,太比特,多WAN和3G无线等。 网关 网关可以是路由器,交换机或PC。对于同一网段内的通信,不必涉及网关。只有当主机和非本地网段设备通信时,才需要将所有数据包发送到网关设备,然后通过网关设备转发或路由它们。 路由器是一个网络层系统。一般来说,市场上的路由器分为两类,一类是单协议路由器,另一类是多协议路由器。路由器可以转换数据格式,成为与协议不同的网络互连的必要设备。 网关与路由的关系可以表示为:网关是网络连接的基础,路由是网络连接的桥梁。 路由器使用静态或动态路由来确定网络之间的最短路径。静态路由需要管理员手动设置,动态路由USES协议以动态发现网络之间的路径并确定最短路径。通常,静态路由用于小型网络,动态路由用于大型复杂网络。 现在,路由器集成了网关功能,因此路由器也具有网关功能。 网关和路由器之间的区别 从网关和路由器的定义来看,如果只连接两个网络,则只需要一个网关。 假设只有两个网络:网络A和网络B. 为了使网络A和网络B能够通信,只使用网关连接两个网络,因为只有两个网络,并且不需要确定网络之间的最短路径。 如果需要连接多个网络,为了确保网络的可靠性,需要将网络结构设计为完整网络或部分网络。通过这种方式,网络之间的通信需要两个设备,网关和路由器。由于当前路由器集成了网关的功能,因此只能使用一个设备路由器。

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Why are industrial routers so popular

文章目录 : 其他

Industrial-grade wireless routers use high-performance 32-bit industrial-grade processors, which are widely used in finance, electric power, postal service, water conservancy, environmental protection, meteorology and other industries. So what are industrial-grade wireless routers for, and why are they so popular?

 

Industrial-grade wireless routers

 

Industrial router is mainly used in intelligent transportation, environmental monitoring, security monitoring, security, wireless mobile detection, industrial data transmission, the financial industry, power industry, water conservancy industry, etc., support – 30 + 75 temperature, wide application. And civil routing is mainly family indoor use, so the adaptability to environment requirement is not high, the temperature only for 0 ~ 55 .

 

The industrial router adopts rugged industrial appearance design, IP30 protection, built-in high-performance industrial-grade 32-bit communication processor wireless module, with embedded real-time operating system as the software support platform, and can be connected to serial devices, Ethernet devices or WIFI devices at the same time.

 

Support APN/VPDN private network, at the same time the device has IPSEC, PPTP, L2TP, GRE, OPENVPN VPN connection, with VPN client, server and other functions. Civil route even some do not have firewall, data security is low.

 

Why are industrial-grade routers so popular?

In the industrial environment, due to the increasing demand for transmission speed and data volume, industrial-grade products are widely used to ensure more high-speed and smooth data exchange. After careful analysis of today’s connector supply market, shenzhen E-Lins is an M2M wireless communication backbone enterprise, which mainly provides: industrial wireless router, wireless data terminal,GPRS DTU,CDMA DTU,3G router,4G router, gateway, etc.

 

Industrial-grade wireless routers

As an industrial-grade router, the industrial-grade 4G router is more powerful than the ordinary household router in many aspects. Generally speaking, the well-known industrial-grade 4G router has the following advantages in the use process.

 

1. High stability

One of the major advantages of industrial-grade 4G routers is their high stability in data transmission and reception. It USES high performance industrial-grade wireless modules and industrial-grade high stability and high precision components, so that it can resist outdoor harsh environment without data transmission interruption or loss.

 

 

 

2. Fast data transmission and processing

 

 

Compared with ordinary routers, industrial-grade 4G routers use high-performance CPU processors, so they can transmit and process data several times faster than ordinary routers. They can satisfy more people to connect to the network at the same time, and the transmission distance is longer and the coverage is larger.

 

 

 

3. Powerful functions

 

 

Advanced industrial-grade 4G routers have more powerful functions than ordinary routers. For the average home router, the function is simple as long as it can connect to the network normally. But for industrial control industry, routers need more functions to run normally. Industrial-grade 4G routers have corresponding functions to meet the needs of different fields. If other special functions are needed, you can also choose customized products.

 

 

 

The main advantages of the industrial-grade 4G router are its high stability, fast data processing speed and powerful functions. In addition, the number of ports it provides and the strong wireless signal receiving ability are also its own advantages. Because industrial-grade 4G routers are often used in high-end fields or in complex outdoor conditions, they must have more functions and advantages to meet people’s needs.

Differences between industrial router and modem

文章目录 : 产品文章

Industry level SMS cat is based on mobile GSM/GPRS network platform, embedded with industry level GSM/GPRS wireless module SMS and Internet devices. Modems are essential to computer networking, and because routers are often used with modems, many people confuse them. So, what are the differences between modems and routers?

 

Industrial MODEM is a modular product specially developed for remote control, remote data acquisition system and remote distributed control system. It is similar in shape to the size of business card, and is easy to connect with the user board.

 

 

What are the differences between industrial modems and routers

 

 

1. Different functions

 

Modem is a necessary equipment of computer networking, a dial-up modem computer can, and the router is a way to help multiple computers share a network device, with the help of the router, several computers can be in the same Internet line access to the Internet, however, necessary equipment of the router is not the Internet, no router, the computer can still connected to the Internet through modem.

 

 

2. Different connection modes

 

Due to the different functions, the two are connected in different ways. One end of a modem is connected to a telephone line, and the other end is connected to a computer or a router.

 

 

3. Different appearance

 

The modem has a simple shape, like a flat rectangular box, which is very small, while the router has a variety of shapes, including rectangular shape and oval shape, with a larger volume than the modem on the whole. In addition, the wireless router also has a number of different antenna devices.

 

4. Different ports

 

Modems generally have only two ports, one for the phone line and one for the Internet, while routers have more ports. Usually, there are five ports, one for the modem, and the rest can be connected to one or more computers at will.

 

Industry modem application:

 

Industrial modem applications are based on cabled data communication, and the industrial RS232 interface (RS232 or TTL level) is suitable for power, oil, telecommunications, military and other unmanned environments. Suitable for various industrial PC, meter reading system, remote control system, SCM remote data communication system;

 

Application: post and telecommunications, finance, power, government, transportation, military, enterprise and other data networks.

 

High-speed line :Internet access, lan-lan connection.

 

The E-Lins H700 series 4G router with Ethernet is a compact, ruggedized 3G/4G/LTE cellular networking solution designed for mission-critical connectivity in the most challenging environments. It is qualified for M2M (Machine to Machine), IoT (Internet of Things) and In-Vehicle applications. Super mini size suitable for embedding applications.

In addition to the robustness, reliability, security, friendly-using, the H685 4G router with Ethernet is competent to be engineered to protect against extreme temperatures, humidity, shocks, vibrations, dust, reverse polarity, and transient voltage, which is widely used in more than twenty industrial fields, such as CCTV security surveillance, AMR, vehicle, retails, vending machines, power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other fields.

 

Highlights:

Multi-carrier 2G/3G/4G LTE support with dual SIM card slot

Cellular/WAN RJ45/WiFi client failover and Load Balance (Bandwidth link bonding)

Supports LTE Advanced with SIM-based auto-carrier selection

Cloud-managed (with NMS network management system), TR-069, Web management, SMS, SSH/Telnet/Command, SNMP

WiFi (802.11 a/b/g/n, 2.4Ghz)

Certified 3G/4G/LTE enterprise/industrial grade internal modems

Built-in transient and reverse polarity voltage protection, over-current and over-voltage protection;

5-40V DC voltage input range (5-60V DC option), Dual Power Inputs / Power Failover;

GPS / GNSS support

Serial Port support RS232+RS232 or RS232+RS485

DI/DO port * 4

Supports Ethernet (T1, DSL, Cable, MetroE), WiFi as WAN, and Metro WiFi

Ruggedized to ensure always-on connectivity

Create real-time alerts to monitor uptime

Offer secure, guest WiFi to passengers

Advanced security, VPN, and stateful firewall to protect sensitive data

Robust Metal Case is ruggedized for vibration, shock

Desktop, Wall-mount and Din-rail mount of installation

External antenna connectors for high gain antennas replacement

MIMO supported

 

All E-Lins communication terminals can be connected to the E-Lins remote managing and controlling platform (NMS), which brings the generous devices scattering in different areas to carry out concentrate monitor, configuration, updated, diagnose, maintenance, manage and control. Highly reduce the maintenance costing in the operator, integrator, devise supplier etc, increase the managing efficiency.

The detailed difference between 4G industrial router and 4G DTU

文章目录 : 产品文章, 技术相关

 

4G industrial router and 4G DTU both realize the wireless network data transmission function, and the differences between them are mainly from the use method, appearance interface and application environment, etc. Today, we will introduce some differences between 4G router and 4G DTU.

 

Different methods of use:

 

4G industrial router:

 

The 4G router can convert Ethernet and fieldbus communication protocols. It only needs to set the IP address specified by the 4G router in the terminal device as the gateway. If the specified IP address (or the specified IP address segment) is not set, the communication function cannot be realized.

 

4 g DTU:

 

The main purpose of 4G DTU is to realize dial-up rather than a real gateway. For example, 4G DTU can be used as a new network device after the dialing process of the access terminal device is completed, and the terminal device address can be used as the binding address of 4G DTU.

 

Different application environments:

 

4G router: usually with VPN/APN function, with private network encryption, in addition, the industrial 4G router with WIFI function is suitable for outdoor WIFI wireless signal coverage projects and similar public transport WIFI and shopping mall WIFI sharing projects.

 

4G DTU: the transmission distance of field terminals is relatively scattered and the data communication rate is relatively high, so the real-time performance of 4G DTU can meet the requirements of most industrial fields and is usually used for data acquisition and monitoring system. For example, the charging pile remote monitoring system, environmental monitoring system, real-time monitoring of energy consumption, monitoring and application of dam water conservancy projects, etc.

 

Different network interfaces:

 

4 g router: provides one network interface of data access, terminal equipment needs only the IP address of the mouth to the 4 g router in the network as a gateway to the IP address of the terminal device must use specified or specify the IP address in the address period, 4 g router to and specify the IP address of the server host or server host IP address sections for data exchange, and all the other 4 g router is not set between the address of the can’t communicate.

 

4 g DTU

 

4 g DTU: DTU data access in general also provides a serial port or network interface, but their use is used to dial, not used to do in the true sense of the gateway, such as serial interface 4 g DTU after completion of the access terminal dial-up, 4 g DTU as terminal equipment of a new network equipment, terminal equipment address using the new network equipment binding address; However, 4G DTU of network interface is similar to ADSL of telecommunication to connect to the Internet, which generally requires the device to complete a dial-up action.

 

Different anti-interference of server network:

 

When using 4G router, the data transmission must comply with the preset regulations, otherwise, the correct communication can not be carried out, reducing the possibility of unnecessary network traffic; At the same time, according to the sent serial number and other key processing, to ensure that the server data will not be replay or retransmission.

 

4G DTU does not carry out relevant filtering during data transmission, so other machines can directly send some illegal information to the device terminal through the network. Meanwhile, 4G DTU increases unnecessary network traffic. At the same time, the data is not processed accordingly, which may lead to the replay or retransmission of wireless data, which will lead to the abnormity of the system, thus causing potential security risks.

 

The E-Lins H685 series 4G router with Ethernet is a compact, ruggedized 3G/4G/LTE cellular networking solution designed for mission-critical connectivity in the most challenging environments. It is qualified for M2M (Machine to Machine), IoT (Internet of Things) and In-Vehicle applications. Super mini size suitable for embedding applications.

In addition to the robustness, reliability, security, friendly-using, the H685 4G router with Ethernet is competent to be engineered to protect against extreme temperatures, humidity, shocks, vibrations, dust, reverse polarity, and transient voltage, which is widely used in more than twenty industrial fields, such as CCTV security surveillance, AMR, vehicle, retails, vending machines, power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other fields.

 

Highlights:

Multi-carrier 2G/3G/4G LTE support with SIM card slot

Cellular/WAN RJ45/WiFi client failover and Load Balance (Bandwidth link bonding)

Supports LTE Advanced with SIM-based auto-carrier selection

Cloud-managed (with NMS network management system), TR-069, Web management, SMS, SSH/Telnet/Command, SNMP

WiFi (802.11 a/b/g/n, 2.4Ghz)

Certified 3G/4G/LTE enterprise/industrial grade internal modems

Built-in transient and reverse polarity voltage protection, over-current and over-voltage protection;

5-40V DC voltage input range (5-60V DC option), Dual Power Inputs / Power Failover;

POE (Power over Ethernet)

GPS / GNSS support

Serial Port

DI/DO port * 4

Supports Ethernet (T1, DSL, Cable, MetroE), WiFi as WAN, and Metro WiFi

Ruggedized to ensure always-on connectivity

Create real-time alerts to monitor uptime

Offer secure, guest WiFi to passengers

Advanced security, VPN, and stateful firewall to protect sensitive data

Robust Metal Case is ruggedized for vibration, shock

Desktop, Wall-mount and Din-rail mount of installation

External antenna connectors for high gain antennas replacement

MIMO supported

 

All E-Lins communication terminals can be connected to the E-Lins remote managing and controlling platform (NMS), which brings the generous devices scattering in different areas to carry out concentrate monitor, configuration, updated, diagnose, maintenance, manage and control. Highly reduce the maintenance costing in the operator, integrator, devise supplier etc, increase the managing efficiency.

Application analysis of iot sensing technology

文章目录 : 其他

 

The Internet of things (iot) is widely used in the integration of networks through intelligent perception, recognition technology, pervasive computing and other communication perception technologies. The iot is understood as “Internet connected by things”. The Internet of things (iot) connects all objects with the Internet through information sensing devices such as Angle sensor, radio frequency identification (rfid) and infrared sensor, so as to realize intelligent identification and management. It is another information industry revolution following the computer, Internet and mobile communication network. Among them, sensor technology is one of the key technologies of the Internet of things.

 

Iot sensing applications

 

1. Intelligent traffic

 

Intelligent transportation is a service system for transportation based on modern electronic information technology. Its prominent feature is the main line of information collection, processing, release, exchange, analysis and utilization, providing diversified services for traffic participants.

 

In intelligent transportation, the sensing technology of the Internet of things is utilized, such as ETC(Electronic Toll Collection), automatic Electronic Toll Collection, traffic monitoring system and traffic flow Collection system. ETC system, also known as no-stop toll collection system, completes the long-distance identification and charge calculation of vehicles through the RFID tags installed on vehicles and the RFID system and transmission system installed at toll stations. The traffic monitoring system mainly USES the numerous cameras throughout the urban roads to collect the video signal of road vehicles, and determines the dredged road section through the judgment and control of the command center. The traffic flow acquisition system can calculate and calculate the traffic flow by installing a ground sensor coil in some major sections or intersections, and provide a real-time and effective reference for the road capacity and traffic condition.

 

2. Intelligent factory

 

The purpose of reasonable allocation and use of resources, energy saving, reduction of machine loss and production safety can be achieved through reasonable scheduling and use of equipment such as monitoring of power consumption of plant equipment, monitoring of equipment operation status and monitoring of main indexes and parameters of equipment.

 

The construction of intelligent factory can use the intelligent interface in the original equipment to output the tested data. We only need to add the iot terminal in the periphery of the output for data transmission and processing. When the device does not contain the sensor or sensing data we need, the device can also be equipped with sensors, such as real-time power of the device, operating temperature of the device, whether the device is running, vibration of the device and other parameters. As long as the management of the required data, can be obtained through the sensor, through the collection and processing of a lot of data, to achieve the purpose of reasonable scheduling and use.

 

3. Intelligent logistics

 

Intelligent logistics is to realize the whole-process management of goods from warehouse to users through bar code technology, RFID technology and Internet of things application development technology.

 

After the production of any commodity, there is the information of the commodity itself, which can be stored in the form of bar code and RFID tag. In the circulation of goods, these information can be read by scanning gun or RFID card reader, etc. By reading the information in the circulation of goods, we can completely track the location of goods, until the goods have been circulated to the hands of consumers, the process is terminated. In large factories, transportation groups, large supermarkets, shopping malls and other places, the intelligent logistics system can facilitate the whole-process tracking of goods, managers can know the location and status of goods at any time, and provide reliable guarantee for the efficient circulation of goods and rational allocation of resources.

 

Modern agriculture

 

The information of temperature and humidity, gas content and illumination are detected by various agricultural environmental sensors to provide reference for agricultural production, and control equipment of water, fertilizer and gas is used to increase production and ensure production.

 

Sensors for agricultural environment include air temperature and humidity sensor, moisture content sensor, soil temperature sensor, gas content sensor (CO, CO, NH, etc.), light intensity sensor, etc. In the application of the Internet of things, these sensors at the terminals collect field data, which are transmitted and processed in the background to judge and publish the temperature, humidity, moisture content, gas content and light intensity, so as to achieve the purpose of intelligent management and intelligent control of the growing environment of crops.

 

5. Smart home

 

Intelligent household also called smart home, based on residential platform, using the integrated wiring technology, network communication technology, security technology, automatic control technology, audio and video technology to integrate the household life related facilities, schedule to build efficient residential facilities and family affairs management system, improve home security, convenience, comfort, artistry, and realize environmental protection and energy saving living environment.

 

Iot sensing technology is widely used in smart home, such as ambient temperature, humidity, door and window switch state, whether someone broke into, light control, air conditioning control, etc. In addition, in the new home appliances have integrated some reserved control functions, such as haier has in its leaves in a new generation of intelligent home appliances control interface, together with other can detect and control devices, Internet of things intelligent household system, these systems detected data, the data can be uploaded to the platform, and through the Internet or mobile WAP, very convenient to realize the host within the home environment and all the equipment control purposes.

What is a single/dual frequency wireless 4G router

文章目录 : 产品文章

1. Introduction to “single frequency” router

The single-frequency router only works in the 2.4ghz band, which is generally supported by wireless terminals. However, the 2.4ghz band has large interference, which may affect the wireless rate and stability.

 

2. Introduction to “dual-frequency” router

Dual-frequency router works in two frequency bands of 2.4ghz and 5GHz, with less interference in 5GHz band. Currently, more and more mobile phones, laptops and other terminals in the market support 5GHz band (if all terminals at home do not support 5GHz band, it is recommended to choose single-frequency router; If you have a terminal that supports 5GHz band, it is recommended to choose a dual-frequency router for better wireless network speed experience.

 

Second. The difference between single/dual frequency wireless routers

The differences between single and dual frequency wireless routers mainly focus on signal range, transmission power, stability and anti-interference.

1. Compared with single frequency, dual frequency has a wider signal coverage. Dual-band wireless routers are more suitable for the complex structure of the house.

2. Dual-frequency wireless routers are more stable than single-frequency wireless devices.

3. Dual frequency wireless router has strong anti-interference performance.

 

Third. Choose “single frequency” or “dual frequency” for wireless router

As the name suggests, dual-band mainly refers to two types of wireless frequency bands: 2.4GHZ and 5GHZ, respectively. Compared with our ordinary router, 5G frequency band is added. Why do we need to add 5G frequency band?

 

In the 2.4ghz band, there are wireless buttons and mice, wireless earphones, bluetooth devices, etc., which also make this band very crowded. Moreover, it is equivalent to a good road, but there are too many cars, which start to cause serious congestion. Therefore, when using the wireless router working in the 2.4ghz band, we will often find that there are problems such as poor wireless signal, network congestion and frequent dropping of the line. There are a lot of household appliances in use will produce 2.4G interference, refrigerator, computer, microwave oven, electric cooker and so on, microwave oven is undoubtedly the most serious interference to wireless signal electrical appliances, so in the layout of the router, we should try to avoid all kinds of home appliances.

 

 

 

There will be interference within the same region, and in general, it will be difficult to get a perfect experience at 2.4g. . At that time if you choose 5 GHZ band patterns will be effective to avoid the spectrum signal interference, a corresponding transmission of wireless signal further, besides dual-band router in the family, almost no other things have a 5 g signals, and in the 5 GHZ frequency band, the mutual interference of channel working 22, considerably more than the mutual interference of 2.4 GHZ channel number. Like a 3-lane highway or a 22-lane highway, which is more accessible is self-evident.

 

 

 

In a word, dual-band routers, although usually more expensive, are definitely better than single-band (2.4ghz) routers. In terms of performance, dual-band routers are much stronger, with more stable signals, wider coverage and stronger penetration.

 

E-Lins has dual band routers H700&H820Q:

 

Among them, H700 is a more comprehensive product. The H700 series Cellular Router is designed for establish a 2G/3G/4G cellular wireless network and share a cellular broadband internet connection. The H700 series Cellular Router enables users to quickly create a secure Wi-Fi (802.11 b/g/n) network and provide access to the internet using a cellular network. By connect to cellular broadband network; an internet connection can be accessed and shared virtually anywhere within a wireless broadband network.

 

E-Linsmobile data products are widely used in more than twenty industrial fields, such as power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other areas.

 

H700 series support single module dual sim cards or dual module dual sim cards

A1) work with one sim card.

A2) work with two sim card. Two sim card backup each other (cold standby for failure backup).

 

 

Main:

Built-in 2G/3G/4G industrial cellular module, insert SIM/UIM card to work directly;

Built-in two sim card slots;

RJ45 LAN *4;

RJ45 WAN *1;

DB9*1

USB3.0*1

Terminal socket GPIO*1

SD card slot*1

 

Option feature:

1.WiFi

2.GPS

3.Serial to cellular gateway (RS232 or RS485 port)

4.DIO

 

Redundancy backup: cellular1+ cellular 2+ WAN RJ45

Industrial Application:

lRemote Data Monitor and Control

lCCTV, security surveillance

lWater, gas and oil flow metering and schedule

lAMR (automatic meter reading)

lPower station monitoring and control

lRemote POS (point of sale) terminals, ATM

lTraffic signals monitor and control, Traffic info guidance

lOil field, weather forecast, environmental protection, street lamp monitoring and control

lEarly Warning of Mountain Torrent

lFleet management

lPower distribution network supervision

lCentral heating system supervision

lWeather station data transmission

lHydrologic data acquisition

lVending machine

lTelemetry, SCADA

lVehicle logistics and diagnostics controlling

lParking meter and Taxi Monitor

lTelecom equipment supervision (Mobile base station, microwave or optical relay station)

Wireless communication DTU features

文章目录 : 产品文章

Data Transfer unit (DTU) is a wireless terminal device specially used to convert serial Data into IP Data or convert IP Data into serial Data for transmission through wireless communication network.

 

DTU advantages:

Rapid and flexible network, short construction cycle, low cost; Wide network coverage; Good security and confidentiality;

 

 

Functional features:

 

1. Internal integration of TCP/IP protocol stack

 

GPRS DTU internally encapsulates PPP dial-up protocol and TCP/IP protocol stack and has an embedded operating system. From the perspective of hardware, it can be seen as the combination of embedded PC and wireless GPRSMODEM. It has the function of GPRS dial-up Internet and TCP/IP data communication.

 

2. Provide bidirectional conversion of serial data

 

GPRS DTU provides serial communication interface, including RS232 and RS485, RS422, etc are the commonly used serial communication mode, and GPRS DTU serial data into mostly on the design “transparent conversion” approach, that is to say, GPRS DTU can transform a serial port on the original data into TCP/IP packet transmission, and don’t need to change the original data communication content. As a result, GPRS DTU can be connected to a variety of user devices that use serial communication, and no changes are required to the user devices.

 

3, support automatic heartbeat, keep online forever

 

Is one of the advantages of GPRS communication network support GPRS terminal equipment permanently online, so typical of GPRS DTU are designed to support the permanent online function, which requires the DTU contains the heartbeat packets on electric automatic dialing, use to maintain permanent online (when long time data communication, mobile gateway connect DTU disconnected from center, heartbeat packets is DTU with data center to send a small data before the connection is disconnected, to keep connection is disconnected don’t), automatic reconnection, the bolt support automatic dialing, etc.

 

4, support parameter configuration, permanent save

 

As a kind of communication equipment, GPRS DTU is widely used. In different applications, the data center IP address and port number, serial port baud rate are different. Therefore, GPRS DTU should support parameter configuration and save the configured parameters in internal permanent storage devices (generally FLASH or EEPROM, etc.). Once powered on, it will automatically work according to the set parameters.

 

5. Support setting of user serial port parameters

 

The serial port parameters of different user devices are different. When DTU connects the serial port of user devices, the DTU terminal should be set according to the actual parameters of the serial port of user devices to ensure the normal communication and reliable data transmission of user devices.

 

Working process:

 

GPRS DTU initiates a TCP or UDP communication request to the data center through parameters such as the IP address of the data center (if the domain name of the data center is used, the IP address of the center will be resolved through the domain name of the center) and port number. Upon receiving the response from the center, GPRS DTU is deemed to have successfully shaken hands with the center, and then the communication connection is maintained. If the communication connection is interrupted, GPRS DTU will immediately shake hands with the center again. Now that the TCP/UDP communication connection has been established, data two-way communication is possible.

 

Application:

Power industry, water conservancy industry, oil industry, municipal industry, environmental protection industry, agricultural application, etc.

 

As Industrial grade router, the E-Lins H685 series 4G router with Ethernet is a compact, ruggedized 3G/4G/LTE cellular networking solution designed for mission-critical connectivity in the most challenging environments. It is qualified for M2M (Machine to Machine), IoT (Internet of Things) and In-Vehicle applications. Super mini size suitable for embedding applications.

In addition to the robustness, reliability, security, friendly-using, the H685 4G router with Ethernet is competent to be engineered to protect against extreme temperatures, humidity, shocks, vibrations, dust, reverse polarity, and transient voltage, which is widely used in more than twenty industrial fields, such as CCTV security surveillance, AMR, vehicle, retails, vending machines, power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other fields.

The advantage of using wireless data transmission module in industrial control system

文章目录 : 产品文章

Data transmission can be simply divided into two major types: wired (including the installation of optical cables, cables or leased telecommunication lines) and wireless (including the establishment of dedicated wireless data transmission system or the borrowing of CDPD, GSM, CDMA and other public network information platforms).

 

 

In comparison, the wireless data transmission mode with wireless data transmission module has the following advantages over other modes. The following describes the advantages of the wireless data transmission mode with wireless data transmission module compared with the wired communication mode.

 

 

1. Wireless communication is cheap

 

The establishment of wired communication means must erect cables or excavate cable trenches, which requires a lot of manpower and material resources. The use of wireless data stations to establish a dedicated wireless data transmission mode does not require the erection of cables or trenching, but only the connection of wireless data stations at each terminal and the erection of antennas at the appropriate height. Compared with the wireless data transmission module to establish a dedicated wireless data transmission mode, saving manpower and material resources, investment is quite economical.

 

 

Of course, in some short-range data communication systems, wireless communication is no cheaper than wired, but sometimes the actual field environment is difficult to wire, customers will choose wireless communication according to the needs of the field environment.

 

 

2. The construction period of wireless communication is short

 

When within a few kilometers to tens of kilometers distance to a remote site connection communication each other, with the method of cable, must set up a long cable long in cable trench, or mining may need several months the project cycle time, and with digital module build special-purpose wireless data transmission way, only need to set up appropriate height of antenna, the project cycle, only need a few days or weeks can, by contrast, can quickly establish a wireless way communication link, shorten the project cycle.

 

 

3. Good adaptability of wireless communication

 

Limitations of wired communication is too large, in case of some special applications, such as mountains, lakes, forests and other special geographical environment and the application of moving object, such as wiring difficult environment, to the wired network wiring project has extremely strong further reading.in, wireless data transmission module and establishing special will not be restricted by the wireless data transmission mode, so in wireless data transmission module build special-purpose wireless data transmission way to more extensive adaptability than the wired communications have better, almost without being limited by the geographical environment.

 

 

4. Good scalability of wireless communication

 

After users set up a communication network, new devices are often added for the needs of the system. If adopt the way of the cable, need to wiring, construction more troublesome, but also could undermine the original communications lines, but if the special set up by adopting the wireless digital radio wireless data transmission way, just put the new devices connected to wireless digital radio can realize the system expansion, in contrast with better extensibility.

 

 

5. Wireless communication equipment maintenance is easier to achieve

 

The maintenance of wired communication link requires the inspection along the line. In case of failure, it is difficult to find out the fault point in time. However, the establishment of dedicated wireless data transmission mode by adopting wireless data transmission module only requires the maintenance of data transmission module.

 

E-Lins mobile data products covers 4G/3G/2G/WiFi routers, modems, CPE, and other data transmission devices, which are widely used in more than 150 countries and regions, and more than twenty industrial fields, such as power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank, CCTV, security surveillance, and many other areas.

As Industrial grade router, the E-Lins H685 series 4G router with Ethernet is a compact, ruggedized 3G/4G/LTE cellular networking solution designed for mission-critical connectivity in the most challenging environments. It is qualified for M2M (Machine to Machine), IoT (Internet of Things) and In-Vehicle applications. Super mini size suitable for embedding applications.

In addition to the robustness, reliability, security, friendly-using, the H685 4G router with Ethernet is competent to be engineered to protect against extreme temperatures, humidity, shocks, vibrations, dust, reverse polarity, and transient voltage, which is widely used in more than twenty industrial fields, such as CCTV security surveillance, AMR, vehicle, retails, vending machines, power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other fields.

Highlight of H685 Mini size router:

Multi-carrier 2G/3G/4G LTE support with SIM card slot

Cellular/WAN RJ45/WiFi client failover

Supports LTE Advanced with SIM-based auto-carrier selection

Cloud-managed (with NMS network management system), TR-069, Web management, SMS, SSH/Telnet/Command, SNMP

WiFi (802.11 a/b/g/n, 2.4Ghz)

Certified 3G/4G/LTE enterprise/industrial grade internal modems

Built-in transient and reverse polarity voltage protection, over-current and over-voltage protection;

5-40V DC voltage input range (5-60V DC option), Dual Power Inputs / Power Failover;

POE (Power over Ethernet)

GPS / GNSS support

Serial Port

DI/DO port * 4

Supports Ethernet (T1, DSL, Cable, MetroE), WiFi as WAN, and Metro WiFi

Ruggedized to ensure always-on connectivity

Create real-time alerts to monitor uptime

Offer secure, guest WiFi to passengers

Advanced security, VPN, and stateful firewall to protect sensitive data

Robust Metal Case is ruggedized for vibration, shock

Desktop, Wall-mount and Din-rail mount of installation

External antenna connectors for high gain antennas replacement

Industrial-grade 4G router TCP/IP network architecture

文章目录 : 技术相关

1. Layering of TCP/IP network system

 

TCP/IP (TransmissionControlProtocol/InternetProtocol), transmission control protocol/Internet protocol. It was developed by the defense advanced research projects agency in the 1970s, and was later integrated into UNIX and popularized. It emerged in the 1980s as the Internet’s communications protocol. With the continuous growth of the Internet, TCP/IP protocol also continues to develop, not only in the wide area network is widely used, in the LAN industry 4G wireless router TCP/IP protocol has replaced other protocols and become widely used protocol. Nowadays, TCP/IP protocol has become a common and universal network interconnection standard.

 

 

TCP/IP protocol is a layered protocol developed by the industrial 4G wireless router based on the OSI reference model.

 

 

The TCP/IP protocol hierarchy is basically designed according to the OSI reference model. Only in three layer on the layers of the TCP/IP protocol to the application layer of the OSI reference model, the presentation layer and session layer and unified into a single application layer, so that the 4 g industrial router function such as the representation of a data format, the establishment of the session and application software more closely together, compared with the OSI reference model is more practical and simple. Although we used to call the industrial GPRS router TCP/IP protocol, in fact it is not a single protocol, but a set of protocols, called the industrial CDMA router TCP/IP protocol family.

 

 

In the TCP/IP protocol family, each protocol is responsible for a part of the network data transmission and provides some aspect of the service for data transmission in the 4G router network. It is because of these protocols that work at all levels that the entire TCP/IP protocol family can effectively work together.

 

 

2. The characteristics and advantages of TCP/IP network system

 

 

In the long-term development process, 3G wireless router IP gradually replaced other networks. Here’s a simple explanation. 3G router IP transmits common data. Data can be used for any purpose and can easily replace data previously transmitted over proprietary data networks. Here’s a common process:

 

 

A proprietary network is developed for a specific purpose. If it works well, users will accept it.

 

 

To facilitate the provision of IP services, they are often used to access E-mail or chat, often through proprietary network tunneling in some way. The LTE router tunneling approach may initially be very ineffective.

The structure of 4G DTU

文章目录 : 技术相关

The main function of DTU is to transmit data from remote devices back to the background center via wired/wireless. Different data transmission modes of DTU include all-network-connected DTU, GPRS DTU, WIFI DTU, CAN DTU and 4G DTU. Today, we will have a look at the structure and work flow of DTU.

 

To complete the data transmission needs to establish a complete data transmission system. In this system includes: DTU, customer equipment, mobile network, background center. On the front end, DTU is connected to the customer’s device via a 232 or 485 interface. Therefore, DTU alone cannot complete the wireless transmission of data, and it needs to be used together with background software. After establishing the connection, the front-end equipment and the back-end center can conduct wireless data transmission through DTU, and the transmission is two-way. The new generation of DTU has developed to varying degrees in terms of simple data collection, multimedia display and data processing.

 

GPRS DTU communication

 

GPRS DTU working process:

After GPRS DTU is powered on, it first reads the working parameters saved in internal FLASH (including GPRS dialing parameters, serial port baud rate, data center IP address, etc., which have been configured in advance).

 

GPRS DTU logs on to GSM network and then does the GPRS PPP dialing. Upon successful dialing, GPRS DTU receives an internal IP address (typically 10.x.x.x) randomly assigned by the mobile. That is, GPRS DTU is in a mobile Intranet, and its Intranet IP address is usually not fixed and changes with each dial. We can understand that GPRS DTU is a mobile internal LAN device, through the mobile gateway to achieve communication with the external Internet public network. This is similar to how a computer in a LAN accesses an external network through a gateway.

 

GPRS DTU initiatively initiates the communication connection with the data center and maintains the communication connection. Because GPRS DTU is in the mobile Intranet, and the IP address is not fixed. Therefore, only GPRS DTU can actively connect to the data center, and not the data center can actively connect to GPRS DTU. This requires the data center to have a fixed public network IP address or a fixed domain name. The public network IP address or fixed domain name of the data center is stored as a parameter in GPRS DTU, so that once GPRS DTU is powered up and successfully dialed, it can be actively connected to the data center.

 

Specifically, GPRS DTU initiates TCP or UDP communication requests to the data center through parameters such as the IP address of the data center (if the domain name of the data center is adopted, the IP address of the data center will be resolved through the domain name of the data center) and port number. Upon receiving the response from the center, GPRS DTU is deemed to have successfully shaken hands with the center, and then the communication connection is maintained. If the communication connection is interrupted, GPRS DTU will immediately shake hands with the center again.

Now that the TCP/UDP communication connection has been established, data two-way communication is possible.

 

GPRS DTU application

 

Wide application of DTU:

DTU has been widely used in electric power, environmental protection, LED information release, logistics, hydrology, meteorology and other industries. Although the application industry is different, but the principle of the application is the same. Most of them are connected with industrial equipment, such as PLC, SCM and other automation products, and then establish wireless communication connection with the background. Today, with the development of the Internet, DTU is more and more widely used. It provides help for the information and industrial integration among various industries. It has also gradually developed into the core technology of iot application.

What are the wireless connection technologies of the IoT

文章目录 : 技术相关

Internet of things (iot) applications have been deeply rooted in our lives. The E-Lins H685 industrial-grade router is a small industrial-grade wireless router with single or double LAN ports. TDD/ fdd-lte, 4G, 3G, GPRS network optional. Besides, what are the wireless connectivity technologies for the Internet of things?

 

1. Ethernet

 

Ethernet is a LAN communication technology. The IEEE 802.3 standard, organized by the IEEE, establishes the technical standard for Ethernet. It specifies the content of the protocol including the connection of the physical layer, the electronic signal and the media access layer. Ethernet USES twisted pair cables as the transmission medium, which can cover up to 200 meters without relaying. The most popular Ethernet types have data transfer rates of 100Mb/s, while newer standards support rates of 1KMb/s and 10KMb/s.

 

The biggest advantage of Ethernet technology is that it is the most commonly used LAN technology and has gradually replaced other LAN standards such as token ring, FDDI and ARCNET. Now we are familiar with the Internet is all these large and small LAN connected together, the formation of a global network.

 

2. Serial communication technology

 

Serial port is a very generic interface for communication between devices and is also widely used for communication between devices and instrumentation. Common serial ports are rs-232 (using 25-pin or 9-pin connectors) and semi-duplex rs-485 and full-duplex rs-422 for industrial computer applications.

 

Serial communication USES serial mode for communication, that is, the serial port sends and receives byte sequences by bit. Typically, the serial port is used for the transmission of ASCII characters. Serial communication USES three wires: ground wire, sending and receiving. The serial communication can use the sending line to send data and the receiving line to receive data at the same time.

 

(1) Advantages

 

The biggest is a bit high penetration rate of serial communication, serial port to a PC or a standard, usually in order to convenient to connect printers, most of the industrial equipment has a serial port, who do not have a serial port devices, in its development, the common method is developed through a serial port to connect to the computer, so a serial port equipment is most simple and easy way to communicate.

 

It is also worth mentioning that the cost of serial communication is very low if the cable connecting the serial port is not considered.

 

(2) Disadvantages

 

The networking ability of serial port communication is poor. Although it is usually more stable than wireless, it is also vulnerable to the electromagnetic influence of the environment in which the cable is located in the industrial environment, resulting in unstable communication or even burnt out serial port. Serial Ethernet is still a long way off, and is generally only suitable for low speed and small data volumes.

 

3. Modbus

 

Unlike the previous communication technologies, Modbus is generally regarded as an application-layer protocol standard for serial communication, and does not include electrical specifications. Modbus was originally published by Modicon in 1979 for the use of programmable logic controller (PLC) communication. Later, three modes of Modbus RTU, Modbus ASCII and Modbus TCP were derived. The first two physical interfaces are the serial ports described above, and the latter one USES the Ethernet interface.

 

With the extensive application of PLC in the industrial field, Modbus has also become the most popular communication protocol in the industrial field. It adopts Master/Slave communication mode, namely one-to-many connection. One Master controller can support up to 247 Slave controllers.

 

(1) Advantages

 

The main advantages of Modbus are:

Standardization, open, free use, no license fee, no intellectual property authorization.

Supports a variety of electrical interfaces, such as serial and Ethernet interfaces, and a variety of transmission media, such as twisted pair, optical fiber, wireless, and so on.

 

The frame format of Modbus protocol is simple, compact and easy to understand. Easy to develop, easy to use.

 

(2) Disadvantages

Modbus mainly has the following problems:

Poor networking capability, only master – slave communication

Network size is limited by the number of slave controllers with poor security, no authentication and no permission management, plaintext transmission is very risky in an uncontrolled environment

 

4. GPRS

 

GPRS stands for General Packet Radio Service. GPRS is a long communication technology between a terminal and a communications base station.

 

Radio services first adopted analog communication technology, which became the first generation of Mobile communication technology, and later adopted digital communication technology, known as the second generation of Mobile communication technology. Among them, Global System for Mobile Communications (GSM) is the most widely used and most successful. GSM is designed primarily for the transmission of voice, voice in transmission, exclusive a channel.

 

GPRS can be said to be a continuation of GSM. It transmits data in packet mode and does not monopolize channels. Therefore, idle channel resources on GSM can be better utilized. The transmission rate of GPRS can reach 56~114Kbps. Using this data service, users can connect to the communication base station of the telecom operator, and then connect to the Internet to obtain Internet information. Launched by the European telecommunications standards commission (ETSI), GPRS was handed over to the 3rd Generation Partnership Project, or 3GPP.

 

(1) Advantages

 

Because the coverage of GSM network signal is very wide, in fact, the area where GPRS service can be used is also very wide, which is the main advantage of GPRS technology.

 

Secondly, the GPRS terminal can roam freely within the signal coverage, and the developer does not need to develop any other communication equipment (the operator is responsible for it), which is convenient for users.

 

Finally, due to the popularity of mobile communication terminals, their costs have been greatly reduced. Therefore, the adoption of GPRS communication technology in the Internet of things has a greater advantage over Wi-Fi or ZigBee in hardware cost.

 

(2) Disadvantages

 

GPRS terminals use the infrastructure of telecom operators when communicating, so they have to pay a certain fee, namely data traffic fee, which limits a large number of devices to connect to the network.

 

The lower rate of GPRS is another problem.

GPRS communication quality is greatly affected by signal strength, and the communication effect is poor in areas without signal coverage or weak, which may affect the completion of service.

 

5. NFC

Near field communication Near field communication NFC is a short-range high-frequency radio technology, which belongs to the RFID technology. Its working frequency is 13.56MHz and its effective working distance is within 20cm. The transmission speed is 106Kb/s, 212Kb/s or 424Kb/s. Data is read and exchanged through card reader and point-to-point business model.

 

NFC was first developed in 2002 by Philips semiconductor, Nokia and SONY. In 2004, NFC BBS was established, dedicated to the standardization and promotion of near-field communication technology.

 

(1)     Advantages

 

NFC communication distance is very short, but the communication confidentiality is good.

 

NFC card no power consumption, card reader power consumption is low, can be applied to a lot of no power consumption, or low power application scenarios.

 

The cost of NFC solutions is low, especially the cost of NFC CARDS is very low, especially suitable for covering a large number of non-intelligent objects.

 

NFC communication technology is currently widely used in mobile payment and consumer electronics. For example, many mobile phones already support NFC applications, and micropayment systems such as bus CARDS all use NFC technology.

 

(2) Disadvantages

 

The NFC does not carry the risk of eavesdropping on the wireless signals of other wireless communications, but the simplicity of its NFC card and the design of its passive response are also factors of insecurity. The risk of seeing reports: that the transaction information in an NFC card, for example, could easily be read by other card readers, or even a smartphone.

 

In addition, short communication distance and low communication rate are also its disadvantages, which limit the NFC to be only suitable for certain iot applications.

 

6. LoRa

 

LoRa comes from the word Long Range, which is a communication technology for long-distance communication. LoRa technology, based on linear Chirp spread spectrum modulation, continues the low-power characteristics of FSK modulation, but greatly increases the communication range. Chirp spread spectrum modulation has long distance transmission and good anti-interference performance, and has been used in military and aerospace communications for many years. In extreme cases, LoRa’s single gateway or base station can cover an entire city or tens of kilometers.

 

(1) application scenarios of LoRa

 

Typical scenarios for LoRa applications include very long battery life (a few years), long-distance communication between nodes, and low rates (such as just a few data transfers per hour). As with NB-iot, low power metrics can be sacrificed to increase speed.