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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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The use of industrial wireless routers

Category : 其他

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, 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, etc.

 

Manufacturers are struggling to resist the onslaught of wireless technology. Wireless technology is now used in PCS and communications devices, and is favored in industry, medicine and automobiles. Wi-fi and bluetooth are popular; Wireless USB, ZigBee and RFID are gaining momentum, especially in consumer electronics, PC and communications.

 

The strong growth of the global mobile Internet device market, which is forecast to grow at a compound annual rate of up to 167 per cent over the next five years, will spur further adoption of wi-fi, bluetooth and ultra-broadband.

 

Despite the impact of wireless technology, PLC, industrial router, switch, DTU equipment and RTU equipment are still the trend of the future.

 

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.

Characteristics and differences between RS485 and RS232

Category : 技术相关

RS232 and RS485 have always been the weak current common interface, but there are a lot of people do not understand the difference between them is not very thorough.

 

I. overview of RS485

 

RS-485 serial bus is widely used when the communication distance is tens of meters to thousands of meters. RS-485 adopts balanced transmission and differential reception, so it has the ability to suppress common mode interference. In addition, the bus transceiver has high sensitivity and can detect voltage as low as 200mV, so the transmission signal can be recovered from kilometers away.

 

The RS-485 operates in a semi-duplex mode, with only one point in the sending state at any time. Therefore, the sending circuit must be controlled by the enabling signal.

 

II. Features of RS485

 

The RS-485 is very convenient for multipoint interconnection and eliminates many signal lines. The RS-485 enables networking to form a distributed system that allows up to 32 parallel drivers and 32 receivers. In view of the shortcomings of RS-232-C, the new standard RS-485 has the following characteristics:

(1) the electrical characteristics of RS – 485: The voltage difference between the two lines ( +6V ~ +2V) represent the logic “1″, the voltage difference between the two lines (-6V ~ -2V) represent logic “0″. The interface signal level is lower than RS-232-C, so it is not easy to damage the interface circuit chip, and the level is compatible with TTL level, making it easy to connect with TTL circuit.

 

(2) The maximum data transmission rate is 10Mbps

 

(3) RS-485 interface adopts the combination of balanced driver and differential receiver, and has strong anti-common mode interference ability, that is, good anti-noise performance.

 

(4) The maximum transmission distance standard value of RS-485 interface is 4000 feet(about 1219meters), which can reach 3000 meters in fact.

 

(5) RS-232-C interface is only allowed to connect to one transceiver on the bus, that is, single station capability; The RS-485 interface is only allowed to connect up to 128 transceivers on the bus, that is, it has multi-station capability, so that users can use a single RS-485 interface to easily establish the device network.

 

III. Overview of RS232

 

The RS-232 interface conforms to the interface standard for serial data communication formulated by EIA. The original number is EIA- RS-232 (short for 232, RS232). It is widely used in computer serial interface peripheral connection. Connect cables and mechanical, electrical characteristics, signal functions and transmission processes.

 

The RS-232-C standard specifies data transfer rates of 50, 75, 100, 150, 300, 600, 1200, 2400, 4800, 9600, 19200 baud per second.

 

IV. Features of RS232

 

RS-232 is one of the main serial communication interfaces. Due to the early appearance of RS232 interface standard, it is inevitable that there are some deficiencies, mainly including the following four points:

 

(1) The interface signal level value is high, easy to damage the interface circuit chip. RS232 interface any signal line voltage is negative logic. That is, logic “1″ is -3 — -15v; Logic “0″ : +3 — +15V, noise tolerance is 2V. That is, the receiver is required to recognize the signal higher than +3V as the logical “0″, and the signal lower than -3v as the logical “1″. TTL level of 5V is the logical positive and 0 is the logical negative. It is not compatible with TTL level, so it needs to use level conversion circuit to connect with TTL circuit.

 

(2) The transmission rate is low, and the bit rate is 20Kbps in asynchronous transmission; Therefore, in 51CPLD development board, the comprehensive program baud rate can only be used 19200, which is also the reason.

 

(3) The interface USES a signal line and a signal return line to form a common ground transmission form, which is easy to generate common mode interference, so the anti-noise interference is weak.

 

(4) The transmission distance is limited. The standard value of the maximum transmission distance is 50 feet, which can only be used for about 15 meters in fact.

 

V. Application field

 

RS-232 is now commonly used in short distance transmission data rate is low, can work effectively in a noisy environment, such as factories, public site, etc., the commonly used equipment has a low-speed modem, industrial control equipment, programmable logic controller (PLC), computer numerical control (CNC) machine tools, robots, embedded control computer, medical instrument and equipment, and embedded controller development system.

 

RS-485 is commonly used in long-distance transmission with high data transmission rate. The commonly used equipment includes point-of-sale terminals (POS), measuring instruments and large specialized automatic machines.

 

But in a normal application, we often need to convert between two different interface types. At this point, we can use the popular USB interface, which can help us to switch to RS-232 interface and RS-485 interface.

 

In conclusion, RS-232 is suitable for short distance and low-speed transmission, while RS-485 is suitable for long distance transmission. RS-485 is a new interface standard aiming at the shortcomings of RS-232 interface. Because of its good anti-noise interference ability and multi-station ability, it has become the preferred standard.

E-Lins H685wrt quick start

Category : 产品文章, 伊林思产品FAQ

Before Installation and Configuration

1. H685 router has different version. Study your router version before installation.

2. For GSM/GPRS/EDGE/HSDPA/HSUPA/HSPA/HSPA+/4G LTE version, please get a SIM card with data business.

3. For CDMA2000 EVDO/CDMA1x version, please get a UIM card with data business or inform us before order if the network uses non-ruim (nam-flashing).

4. Make sure the sim card or uim card is with enough data business and balance.

5. Make sure the signal is good enough where you test or install the router. Weak signal will make the router no work. If you find your signal strength is not good, please contact us for high gain antenna.

6. Different countries and carriers use different network band and frequency. E-Lins packs units with free world-wide-use antenna. It can work, but the data speed or signal may not be good at your sites. Please buy dedicated high gain antenna from your local suppliers or contact E-Lins to OEM/ODM the antenna.

Notes: This quick start is for GSM/GPRS/EDGE/HSDPA/HSUPA/HSPA+/TD-SCDMA/4G LTE network only. For EVDO network or CDMA network, please refer to manual or contact us freely.

Step 1) Confirm the sim card if can work with other 2G/3G/4G router or modem. If the sim card can not work, the router will not work correctly.

Step 2) Connect the H685 Router LAN port to a PC via RJ45 cable. Make the PC automatically to get the IP, Submask, DNS. The PC will be get a IP of 192.168.1.xxx.

Step 3) At PC web browser, please type: http://192.168.1.1 Username: admin Password: admin

Research: China IoT Market is expected to Worth 121.45 Billion USD by 2022

Category : 其他, 技术相关

According to the new market research report China IoT Market by Hardware (Processor, Memory, Logic, Sensor, & Connectivity), Software (Real-Time Streaming, Network Security, Data Management, Remote Monitoring, & Bandwidth Management), Platform, Service, and Application – Global Forecast to 2022,published by MarketsandMarkets, the market is expected to reach USD 121.45 Billion by 2022, at a CAGR of 41.1% between 2016 and 2022.

The major factors driving this market are the growing demand for smartphone and other connecting devices, the increasing internet penetration, rising trends of industrial automation, and mainstream adoption of cloud computing.