As a communication technology, GPRS provides services for realizing telematics in a broad sense. As computers and various smart devices with processing functions are increasingly used in various fields, the application scope of data communications is also expanding.
In the field of Internet of Things, GPRS is an important technical means for mobile devices to achieve network access. According to surveys, 80% of current mobile IoT devices still use GPRS communication modules.
Что такое GPRS DTU ?
GPRS DTU is an Internet of Things wireless data terminal that uses the operator’s GPRS network to provide users with wireless long-distance data transmission functions. It uses high-performance industrial-grade 8/16/32-bit communication processors and industrial-grade wireless modules, and also provides RS485 /RS232/AI/DI/DO and other interfaces can directly connect to serial devices to achieve transparent data transmission. For example: ZHC2911 of Zongheng Intelligent Control is an industrial-grade GPRS DTU with rich interfaces, supporting TCP/UDP transparent transmission, HTTP two-way communication, automatic data collection, and automatic control switches; it supports WEB remote configuration and FOTA firmware upgrade, which is simple and convenient. Let your device easily connect to the Internet wirelessly.
Как работает GPRS DTU
After the GPRS DTU is powered on, it first reads out the working parameters saved in the internal FLASH (including GPRS dial-up parameters, serial port baud rate, data center IP address, etc., which have been configured in advance).
Then, the GPRS DTU initiates a TCP or UDP communication request to the data center through parameters such as the data center’s IP address and port number. After getting the response from the center, GPRS DTU considers that the handshake with the center is successful, and then keeps the communication connection existing. If the communication connection is interrupted, GPRS DTU will immediately re-handshake with the center.
Пока DTU устанавливает двустороннюю связь с центром обработки данных, преобразование данных последовательного порта пользователя и пакетов данных сети GPRS выполняется относительно просто. Как только данные последовательного порта пользователя получены, DTU немедленно инкапсулирует данные последовательного порта в пакет TCP/UDP и отправляет его в центр обработки данных. Напротив, когда DTU получает TCP/UDP-пакет из центра обработки данных, он извлекает содержимое данных и немедленно отправляет его на пользовательское устройство через последовательный порт.
Application scenarios of GPRS DTU
Electric power industry: remote power meter reading, power line monitoring, substation monitoring, distribution network monitoring, etc.
Water conservancy industry: water quality monitoring, reservoir monitoring, reservoir gate remote control, water conservancy dispatching system, water pipe network monitoring, etc.
Agricultural applications: greenhouse remote monitoring and management, aquaculture monitoring and management, agricultural water pump monitoring and management, etc.
Municipal industry: remote monitoring and management of street lights, remote monitoring of pipe networks, urban energy consumption monitoring, etc.
Environmental protection industry: noise monitoring, dust monitoring, pollution source monitoring, atmospheric environment monitoring, etc.
Petroleum industry: gas pipeline network monitoring, oil field automation, remote monitoring of oil and gas wells, etc.
Other industries: elevator remote monitoring, warehouse monitoring and management, gas station data collection, meteorological information collection, industrial energy consumption monitoring, etc.