The core functions of GPRS DTU and its common application in several major industries

GPRS DTU adopts high-performance industrial grade 8/16/32-bit communication processor and industrial-grade wireless module, with embedded real-time operating system as software support platform, and provides RS232 and RS485 (or RS422) interface, which can be directly connected to serial device，achieve transparent data transmission. Today we will take a look at the core functions of GPRS DTU:

1) Internal integrated TCP/IP protocol stack

The GPRS DTU encapsulates the PPP dial-up protocol and the TCP/IP protocol stack and has an embedded operating system. From the 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 serial data bidirectional conversion function

GPRS DTU provides serial communication interface, including RS232, RS485, RS422, etc., which are commonly used serial communication methods, and GPRS DTU is designed to design serial data as "transparent conversion", which means GPRS DTU can The original data on the serial port is converted into a TCP/IP data packet for transmission without changing the original data communication content. Therefore, the GPRS DTU can be connected to various user equipments that use serial communication, and there is no need to change the user equipment.

3) Support automatic heartbeat, keep online forever

One of the advantages of the GPRS communication network is that it supports the GPRS terminal device to be permanently online. Therefore, the typical GPRS DTU is designed to support the permanent online function. This requires the DTU to include automatic dial-up for power-on and use the heartbeat packet to remain permanently online (when long time When there is no data communication, the mobile gateway will disconnect the DTU from the center. The heartbeat packet is that the DTU and the data center send a small data packet before the connection is disconnected to keep the connection from being disconnected automatic redialing and other features.

4) Support parameter configuration, permanent save

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 save the configured parameters in the internal permanent storage device (usually FLASH or EEPROM, etc.). Once powered, it automatically works 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 equipment, the DTU terminal should be set according to the actual parameters of the serial port of the user equipment to ensure normal communication and reliable data transmission of the user equipment.

The industrial application of GPRS DTU is mainly in the following major industries:

Common applications: PLC realizes wireless communication application through DTU DTU and remote configuration software realizes wireless transmission

Power industry: 1. Power remote meter reading, 2. Substation monitoring, 3. Power line monitoring, 4. Power distribution network on-column switch monitoring system

Water conservancy industry: 1. Water quality monitoring, 2. Remote control system scheme for reservoir gates, 3. Application scheme of water conservancy GPRS dispatching system 4. Water network monitoring system, 5. Reservoir automatic monitoring system

Petroleum industry: 1 remote monitoring of oil and gas wells, 2. GPRS remote oilfield automatic monitoring and monitoring system, 3. gas pipeline network monitoring system program

Municipal industry: 1. Remote monitoring and management of street lamps 2. Remote monitoring of pipe network 3. Urban energy consumption monitoring

Environmental protection industry: 1. Pollution source monitoring 2. Atmospheric environmental monitoring 3. Noise monitoring 4. Dust monitoring

Agricultural application: 1. Remote monitoring and management of greenhouses 2. Monitoring and management of aquaculture 3. Monitoring and management of agricultural water pumps

Other industries: 1. Warehouse monitoring and management. 2. Elevator remote monitoring 3. Remote crane management system 4. Application of industrial energy consumption monitoring 5. Gas station GPRS data acquisition system 6. GPRS weather information collection system