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The advantage of using wireless data transmission module... 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...

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Industrial-grade 4G router TCP/IP network architecture 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...

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The structure of 4G DTU 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...

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What are the wireless connection technologies of the... 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....

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The use of industrial wireless routers Industrial-grade wireless router adopts high performance 32-bit industrial-grade ARM9 communication processor, which is widely used in finance, electric power, postal, water conservancy, environmental protection, meteorology and other industries.   Industrial router is mainly used in intelligent transportation,...

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What are the wireless connection technologies of the IoT

Category : 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.

 

4g router features of E-lins Technology

Category : 产品文章

With the development of new communication technologies and the continuous improvement of network efficiency and function of wireless communication, 4G has been widely used. 4G industrial-grade wireless routers are playing an increasingly important role in the applications of various industries, and the price is getting cheaper and cheaper. Currently, there are a lot of optional devices in the market, so how to choose one that can guarantee long-term use, stability and reliability, and affordable price is the problem that customers think about the most. The following is a specific selection reference for the 4G industrial wireless router of E-lins technology.

 

I. Industrial-grade design

1. Adopt high-performance industrial-grade 32-bit processor and adopt qualcomm chip, the world’s top wireless solution, with high processing speed, low power consumption, low heat output, strong compatibility and more stable, which can meet the requirement of 365 days a year, 7*24 hours long and stable operation without dropping the line.

2. Adopt high-performance industrial-grade communication module and high-quality communication module of huawei and other first-tier brands, with strong reception ability, stable signal and faster transmission.

The operating system uses OpenWRT, a highly modular, highly automated embedded Linux system, which makes the device more stable, has a large capacity of Flash and memory, and can support the requirements of customized development. High quality PCB circuit boards are manufactured with high quality materials and high standard. Stable industrial components are used for product components. All the machines are automated to realize patch production, ensuring the stability and reliability of the products. The power supply adopts wide voltage design to support dc5v-40v, with built-in anti-phase protection and over-voltage and over-current protection of the power supply, which can withstand the impact of instantaneous high voltage and current. Ethernet USES gigabit network port, built-in electromagnetic protection Ethernet interface built-in 1.5kv electromagnetic isolation protection, gigabit network port, faster transmission speed. The shell with strong anti-interference ability adopts thickened metal shell, shielding electromagnetic interference, and the equipment protection grade IP34, which is suitable for use in harsh industrial environment.

 

II. Powerful function

 

Multi-mode multi-card, load balancing

Expand network equipment and server bandwidth, increase throughput, enhance network data processing capacity, and improve network flexibility and availability.

 

Support global network formats

Support 2G, 3G and 4G networks of the three major domestic operators, or support Europe, southeast Asia, Africa, Latin America and other countries.

 

Support wired wireless backup

WAN port and LAN port can be flexibly switched to support wired and wireless backup of WAN port, with wired priority and wireless backup.

 

Serial transmission

Support simultaneous RS 232/485 serial port transmission.

 

Support APN/VPDN special network card, support a variety of VPN support APN/VPDN special network card use, at the same time support PPTP, L2TP, Ipsec, OpenVPN, GRE and other VPN.

 

Powerful WIFI function

WIFI supports 802.11b/g/n, WIFI AP, AP Client, repeater, relay bridge, WDS and other working modes, 802.11ac, or 5.8g (optional).

 

Support IP penetration function can achieve the IP address of the host IP obtained for the router, which is equivalent to the host directly plugging in the card to dial up the Internet to obtain the IP of the base station.

 

VLAN virtual LAN division through the division of VLAN, enhance the security of the LAN, VLAN technology, can be different locations, different networks, different users together, forming a virtual network environment. Support QOS, bandwidth speed limit support different network port bandwidth speed limit, IP speed limit, total bandwidth speed limit. Support DHCP, DDNS, firewalls, NAT and the function such as DMZ host support ICMP, TCP, UDP, Telnet, FTP, HTTP, HTTPS and network protocol support time to restart, SMS control, GPS/beidou positioning function (optional), support M2M cloud platform management, mobile monitoring and WEB monitoring, device data monitoring, traffic limit function, push resources, statistics, the remote device management (remote restart, WiFi switch), remote parameter modification, traffic restrictions, GPS tracking trajectory.

 

III. stable and reliable

1. Support hardware WDT watchdog, provide anti-dropping mechanism, and ensure that the data terminal is always online.

2. Support ICMP detection and traffic detection, automatically restart the equipment if network abnormality is found in time to ensure the stability and reliability of the system in long-term use.

3. Industrial-grade design, metal shell, anti-interference, anti-radiation, 95% humidity, no condensation, high temperature and low temperature resistance, minus 30 degrees to 75 degrees high temperature can work normally.

4. Our products have passed CCC certification, European CE certification and other certifications

 

Simple operation, easy to use

1. Simple Internet access, push-stick user card interface, insert mobile phone card/Internet of things card/special network card, and you can use the network port and WIFI after power on.

2. Support software and hardware to restore factory Settings, software can clear parameters, hardware RST one-key to restore factory Settings.

3. Product quick operation manual, WEB menu-type page, can quickly set up the device for use.

4. Diagnostic tools: log download and view, remote log record, ping detection, route tracking, easy to detect device information.

E-Lins Industrial router applications

Category : 技术相关

Industrial-grade routers as Internet network layer communication equipment application in all walks of life, brought a lot of convenience for our industry. “E-Lins” introduce the application of industrial router scenario analysis.

 

1 The self-service terminal network

 

E-lins industrial router networking facilitates the wireless networking and remote management of self-service terminals. Operations can be self-service equipment such as self-help harvest home, machines, payment terminal layout to any area of the wireless network coverage, such as shopping malls, neighborhood, community, etc., a substantial increase in business volume.

 

2 The smart grid remote video monitoring

 

Remote video monitoring system has been widely used in intelligent monitoring of transmission lines. The system carries out remote real-time video monitoring of transmission lines, towers and transmission substation of transmission lines. The collected real-time video image information can be transmitted to the management center through the link of industrial wireless router. Real-time monitoring of transmission line state, enhance the level of the lean production management.

 

3 Management of public bicycle in traffic areas

 

Public bike rental system includes management center, customer service sites, bike rental sites of three parts. Industrial router applications in the center of the management of communication management system, through the network operators, box rental management system with the background data forwarding, intelligent parking system and settlement system of data transmission, transfer, and the data transmission function with the other application systems.

 

4 Remote audio-video monitoring of driver’s license test

 

In order to effectively prevent accidents, control the source of safety management and regulate the driver’s license examination, the traffic management bureau of the ministry of public security has been successively implemented in various places to strengthen the management guidance of motor vehicle drivers. Cameras are installed on the driver’s license examination vehicles, and connected with the rear platform through 4G industrial router. The subjects of the driver’s test of automobiles are subject to video and audio monitoring. Print 3 randomly captured test photos on the test report card of each subject, and the test video will be kept for more than 1 year.

 

5 WIFI bus

 

WIFI bus is an important part of wisdom city. Routers through 4 g in the car industry, will be on the way of the 3 g / 4 g mobile communication base station emission signal into stable quality of network signals (such as wi-fi signals), micro letter can easily meet car passengers chat, on QQ, local news, download the APP and other mobile Internet lifestyle. Can fully support all the bus company and scheduling, scheduling, statistical analysis and other business needs; Can also support the bus video image transmission of the monitoring system, once the vehicle accident or emergency, video monitoring system can start immediately, will video transmission to the rear of the console for emergency response and scheduling platform center.

 

6 Intelligent express delivery cabinet

 

The intelligent express delivery cabinet connects and interacts with the central management platform via the operator’s 3G/4G wireless network through wireless router to realize remote management and monitoring. And through the VPN and VPDN, realize the security of the data transmission. Send and receive express real-time, liberate the workforce, the center server for data processing and integration, realizing data sharing, in order to ensure real-time and efficient express business. Real time control of the terminal all express ark centralized remote management, operation condition, reduce operating costs, improve service quality.

 

7 Equipment remote monitoring

 

Using 4 g industrial router to establish a system of numerical control machine tool remote fault diagnosis is to CNC machine tool fault diagnosis technology and the INTERNET of wireless communication technology, the combination of establishing monitoring on nc machine tools, its running status data, and in the center of the enterprise local area network and the INTERNET to establish expert diagnosis and analysis of CNC machine running status diagnosis. It can make fault diagnosis is more flexible and convenient, and can effectively improve the diagnostic accuracy and work efficiency, reduce maintenance time.

 

The industrial wireless router has become a magical device in the field of Internet of things M2M due to its fast transmission rate and strong stability.

Wireless M2M Make Machine Talk

Category : 其他

What’s wireless M2M?

M2M=Machine to Machine, which means let the machines communicates together. Wireless M2M use wireless network for the communications, such as cellular wireless network, RFID, WiFi, Wimax and other networks.

Wireless-M2M, provides communications between people, devices and systems that turns data into information, that can communicate with companies management systems so they can act upon it. Machine-to-machine solutions are giving corporate adopters an efficient and cost-efficient method to make necessary connections happen. Companies adopting M2M are using these solutions to solve their challenges, whether it is by industry or application. Machine-to-machine business is about creating solutions aimed at improving existing business, creating new opportunities, and essentially making daily life easier. What makes M2M solutions so essential is that the technology is driven more by devices interacting with people and other devices and systems. The goal is to increase performance and competitiveness of companies, cost-saving and better service levels.

Wireless-M2M solutions range from embedded modules and boards, to external boxed solution products can make virtually any existing, or legacy devices to be easily networked, either wired or wireless. Our wireless connectivity products utilise Bluetooth, GSM, GPRS and Wi-Fi technologies to simplify cabling, increase user mobility, and enable remote device management. Wireless-M2M has helped customers in a range of vertical markets wirelessly enable their products all over the world. Applications range from Remote Data Monitoring, asset tracking, Retail Business messaging, Remote Alarm Monitoring, EPOS, Industrial, Energy Management and many others.

Wireless M2M communications Wireless-M2M range of GSM, GPRS, Bluetooth, Wireless and GPS, intelligent products provide the most robust, high-performance, and fastest route for wireless connectivity into products for data and multimedia applications for easy integration.

However, cellular network is the most used and mainly used for wireless m2m. The GSM network, 3G network, even new 4G network are the good choice for M2M if the cable network is unconvenient to get.

解读M2M和物联网

Category : 其他

很多朋友把M2M和物联网看成同一个概念,这是不准确的,在这里伊林思为您解读M2M和物联网的区别,那么什么是M2M,什么又是物联网?简单的说,M2M是将数据从一台终端传送到另一台终端,也就是就是机器与机器的对话。M2M不是什么新概念,也是司空见惯 的现象,比如我们上班用的门禁卡,超市的条码扫描,再比如日前比较流行的NFC手机支付。多年以前,伊林思科技在M2M方面已经做出了很大成就和很多宣传和工 作,并推出了一些全球领先的M2M产品,成功地在很多领域推广使用。物联网(TheInternetofthings)的概念是在1999年提出的,它的定义很简 单:把所有物品通过射频识别等信息传感设备与互联网连接起来,实现智能化识别和管理。物联网指的是将各种信息传感设备,如射频识别(RFID)装置、红外 感应器、全球定位系统、激光扫描器等种种装置通过网络(主要是移动网络)实现与互联网的结合,从而形成的一个巨大网络,用伊林思科技的话说就是“everything network”。