Overview of the Functionalities of 4G Routers

4G router adopts high-performance industrial 32-bit communication processor and industrial-grade wireless module. It uses an embedded real-time operating system as a software support platform, and provides one RS232 (or RS485/RS422), Ethernet LAN, and Ethernet WAN. A WIFI interface can connect serial devices, Ethernet devices and WIFI devices at the same time to realize transparent transmission and routing of data.

At present, industrial grade products have a patented technology that maintains a stable system, ensuring that the equipment is always on-line; the entire machine adopts a metal housing, resists interference and radiation, and adopts an industrial-grade design on the hardware; the system is equipped with a watchdog WDT protection and is additionally loaded with system monitoring. Protect SWP (System Watch Protect); The whole product passes the European CE certification, passes the test of the inspection center, passes the electricity 3000V electric shock test, all wireless modules have passed the CGD authentication or the FCC authentication or the CE authentication; After rigorous design, test and 10 years of practical application, product performance is stable and reliable.

Hardware

DTU hardware components mainly include CPU control module, wireless communication module

Wide network coverage;

Good security and confidentiality;

Link support is always on-line, meter-based, and user-low cost;

CPU: Industrial-grade high-performance ARM9 embedded processor with memory management MMU, 200MPS, 16KB Dcache, 16KB Icache

FLASH: 8MB, expandable to 32MB

SDRAM: 64MB, expandable to 256MB

Interface

1 RS232 serial port

Serial speed: 110bps ~ 230400bps

Data bit support: 8 or 7 bits

Parity: None or Odd or Even

Stop position: 1 or 2

One RS485 interface (If necessary, hardware jumper supports RS232/422/TTL)

Serial speed: 110bps ~ 230400bps

Data bit support: 8 or 7 bits

Parity: None or Odd or Even

Stop position: 1 or 2

Control port:

RS-232, 115200 bps, 8 data bits, 1 stop bit, no parity (8N1)

Indicators: Power, Communication and Online Indicators

Antenna interface: standard SMA female antenna interface, characteristic impedance 50 ohms

UIM card interface: 3V/1.8V standard push-rod user card interface

Power connector: standard 3-pin engine power outlet

3.5 Power Supply:

External power supply: DC 9V 500mA

Wide voltage supply: DC 5-40V

Communication current: 350mA

Standby current: 35mA

3.6 Other parameters:

Working environment temperature: -35~+75º C

Storage temperature: -40~+85º C

Relative humidity: 95% (non-condensing)

Software components

3.7 TCP/UDP transparent data transmission; supports multiple operating modes. Heartbeat technology

3.8 Smart anti-drop, support for online detection, online maintenance, automatic redial of dropped calls, ensure that the device is always online

3.9 Support Virtual Data Private Network (APN/VPDN)

4.0 Supporting Data Center Dynamic Domain Name and IP Address Access

4.1 Supports DNS dynamic acquisition to prevent the device from crashing due to abnormal DNS server

4.2 Supporting Dual Data Center Backup

4.3 Supporting Multiple Data Centers to Accept Data Simultaneously

4.4 Wake-up support for SMS, voice, data, etc. and timeout

4.5 Supporting Short Message Backup and Alarms

4.6 Multiple Hardware and Software Watchdogs

4.7 Packet Transmission Status Report

4.8 Standard AT Command Interface

4.9 can be used as a normal dial MODEM

4.10 support telnet function

4.11 support remote configuration, remote control

4.12 Software Upgrade through the Serial Port

4.13 Supporting LINUX Systems

Core functions

1) Internal Integrated TCP/IP Stack

GPRS DTU encapsulates PPP dial-up protocol and TCP/IP protocol stack and has embedded operating system. From hardware, it can be regarded as a combination of embedded PC and wireless GPRS MODEM; it has GPRS dial-up Internet access and TCP/IP data. The function of communication.

2) Provide bidirectional conversion function of serial data

GPRS DTU provides a serial communication interface, including RS232, RS485, RS422, etc. are all commonly used serial communication methods, and GPRS DTU design in most of the serial data is designed as a "transparent conversion" mode, which means that GPRS DTU can The raw data on the serial port is converted into TCP/IP data packets for transmission without changing the original data communication content. Therefore, the GPRS DTU can be connected to various user equipment’s that use the serial communication without changing the user equipment.

3) Support automatic heartbeat and stay permanently online

One of the advantages of the GPRS communication network is that the GPRS terminal equipment is permanently online, so typical GPRS DTUs are designed to support the permanent online function, which requires the DTU to include automatic dialing on power and use of heartbeat packets to maintain permanent online (when long When there is no data communication, the mobile gateway will disconnect the DTU from the center. The heartbeat packet is a small data packet sent between the DTU and the data center before the connection is disconnected to keep the connection from being disconnected. It supports automatic disconnection of the disconnected line. , automatic redial and other features.

4) Support parameter configuration, permanent preservation

As a communication device, GPRS DTU has a wide range of applications. In different applications, the IP address and port number of the data center and the baud rate of the serial port are different. Therefore, the GPRS DTU should support parameter configuration and store 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 user serial port parameter setting

The serial port parameters of different user devices are different. When the DTU is connected to the serial port of the user device, the DTU must be set according to the actual parameters of the user device serial port to ensure the normal communication and reliable data transmission of the user device.

Application area

DTU has been widely used in power, environmental protection, LED information release, logistics, hydrology, weather and other industries. As shown in the above figure, the principle of application is the same, although the industry of applications is different. Mostly, DTUs are connected to industrial equipment, such as PLCs, SCMs, and other automation products, and then establish a wireless communication connection with the background. With the increasing development of the Internet, the use of DTUs has become more widespread. It has provided assistance for the integration of information and industry among various industries and industries.

Field Application

1. Power industry

2. Water conservancy industry

3. Oil industry

4. Municipal Industry

5. Environmental protection industry:

6. Agricultural applications

Other industries:

1. Warehouse monitoring and management

2. Elevator remote monitoring

3. Remote crane management system

4. Application of Industrial Energy Monitoring

5. Gas Station GPRS Data Acquisition System

6. GPRS weather information collection system