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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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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.

what’s openwrt?

Category : 技术相关

What’s openwrt? in my mind,openwrt is running on the embedded device linux systems.
OpenWrt file system is writable, developers do not need to recompile after each modification,
Make it more like a mini Linux computer systems, but also accelerated the development speed.
You will find both the ARM, PowerPC, or MIPS processor, has a very good support.
And with around 3000 packages, users can easily customize the features to make the firmware.
Can be easily ported to various types of functions under openwrt.

Case:e-lins H860 openwrt router

What is OpenWrt

Category : 其他, 技术相关

OpenWrt is an embedded operating system based on the Linux kernel, primarily used on embedded devices to route network traffic. The main components are the Linux kernel, util-linux, uClibc or musl, and BusyBox. All components have been optimized for size, to be small enough for fitting into the limited storage and memory available in home routers.
OpenWrt is configured using a command-line interface (ash shell), or a web interface (LuCI). There are about 3500 optional software packages available for installation via the opkg package management system.
OpenWrt can run on various types of devices, including CPE routers, residential gateways, smartphones, pocket computers (e.g. Ben NanoNote), and laptops. It is also possible to run OpenWrt on personal computers, which are most commonly based on the x86 architecture.
History
The project came into being because Linksys built the firmware for their WRT54G series of wireless routers from publicly available code licensed under the GPL. Under the terms of that license, Linksys was required to make the source code of its modified version available under the same license, which in turn enabled independent developers to create additional derivative versions. Support was originally limited to the WRT54G series, but has since been expanded to include many other chipsets, manufacturers and device types, including Plug Computers and Openmoko mobile phones.
Using this code as a base and later as a reference, developers created a Linux distribution that offers many features not previously found in consumer-level routers. Some features formerly required proprietary software. Before the introduction of OpenWrt 8.09, using Linux 2.6.25 and the b43 kernel module, WLAN for many Broadcom-based routers was only available through the proprietary wl.o module that was also provided for Linux kernel version 2.4.x only.
The code names of OpenWrt branches are named after alcoholic beverages, usually including their recipes in the MOTD as well, cf. White Russian, Kamikaze, Backfire, Attitude Adjustment, Barrier Breaker.
The bleeding edge development trunk was confusingly also called Kamikaze until February 2011 but with r25514 it was renamed as “Attitude Adjustment” and is now being constantly renamed to the next stable name.
Features
OpenWrt follows the bazaar-philosophy and is known for an abundance of options. Features include:
• A writable root file system, enabling users to add, remove or modify any file. This is accomplished by using overlayfs to overlay a read-only compressed SquashFS file system with a writable JFFS2 file system in a copy-on-write fashion. JFFS2 supports flash wear leveling.
• The package manager opkg, similar to dpkg, enables users to install and remove software. The package repository contains about 3500 packages. This contrasts with Linux-based firmwares based on read-only file systems without the possibility to modify the installed software without rebuilding and flashing a complete firmware image.
• A set of scripts called UCI (unified configuration interface) intended to unify and simplify the configuration of the entire system
• Extensible configuration of the entire hardware drivers, e.g. built-in network switches and their VLAN-capabilities, WNICs, DSL modems, FX, available hardware buttons, etc.
• Exhaustive possibilities to configure network-related features, like:
• IPv4 support.
• IPv6 native stack:
• Prefix Handling,
• Native IPv6 configuration (SLAAC, stateless DHCPv6, stateful DHCPv6, DHCPv6-PD),
• IPv6 transitioning technologies (6rd, 6to4, 6in4, ds-lite, lw4o6, map-e),
• Downstream IPv6 configuration (Router Advertisement, DHCPv6 (stateless and stateful) and DHCPv6-PD).
• Routing through iproute2, Quagga, BIRD, Babel etc.
• Mesh networking through B.A.T.M.A.N., OLSR and IEEE 802.11s-capabilities of the WNIC drivers
• Wireless functionality, e.g. make the device act as a wireless repeater, a wireless access point, a wireless bridge, a captive portal, or a combination of these with e.g. ChilliSpot, WiFiDog Captive Portal, etc.
• Wireless security: Packet injection, e.g. Airpwn, lorcon, e.a.
• Stateful firewall, NAT and port forwarding through netfilter; additionally PeerGuardian is available
• Dynamically-configured port forwarding protocols UPnP and NAT-PMP through upnpd, etc.
• Port knocking via knockd and knock
• TR-069 (CWMP) client
• IPS via Snort (software)
• Active queue management (AQM) through the network scheduler of the Linux kernel, with many available queuing disciplines. CoDel has been backported to Kernel 3.3. This encapsulates Traffic shaping to ensure fair distribution of bandwidth among multiple users and Quality of Service (QoS) for simultaneous use of applications such as VoIP, online gaming, and streaming media without experiencing the negative impacts of link saturation.
• Load balancing for use with multiple ISPs using source-specific routing
• IP tunneling (GRE, OpenVPN, pseudowire, etc.)
• Extensible realtime network monitoring and statistics through e.g. RRDtool, Collectd, Nagios, Munin lite, Zabbix, etc.
• Domain Name System (DNS) and DHCP through Dnsmasq, MaraDNS, etc.
• Dynamic DNS services to maintain a fixed domain name with an ISP that does not provide a static IP address
• Wireless distribution system (WDS) including WPA-PSK, WPA2-PSK, WPA-PSK/WPA2-PSK Mixed-Mode encryption modes
• OpenWrt supports any hardware that has Linux support; devices that can be connected (e.g. over USB) to an embedded device include
• Printers
• Mobile broadband modems
• Webcams
• Sound cards
• Notable software packages to use the hardware support are:
• File sharing via SAMBA, (Windows-compatible), NFS and FTP, printer sharing over the print server CUPS (spooling) or p910nd (non-spooling)
• PulseAudio, Music Player Daemon, Audio/Video streaming via DLNA/UPnP AV standards, iTunes (DAAP) server
• Asterisk (PBX)
• MQ Telemetry Transport through Mosquitto
• An extensive Ajax-enabled web interface, thanks to the LuCI project
• Regular bug fixes and updates, even for devices no longer supported by their manufacturers

 

Link to E-Lins OpenWrt Products:

http://www.e-lins.com/EN/download/H685_Datasheet_Eng.pdf

http://www.e-lins.com/EN/download/H820_Datasheet_Eng.pdf

http://www.e-lins.com/EN/download/H850_Datasheet_Eng.pdf

http://www.e-lins.com/EN/download/H860_Datasheet_Eng.pdf