DTU automation terminal is an Internet of Things wireless data transmission device that uses public operator networks to provide users with wireless long-distance data transmission functions. It uses high-performance industrial-grade 32-bit communication processors and industrial-grade wireless modules to operate in embedded real-time. The system is a software support platform and also provides an RS485/232 interface, which can directly connect to serial devices to achieve transparent data transmission.
The four core functions of DTU automation terminal:
1. Provide bidirectional conversion function of serial port data
DTU automated terminals provide serial communication interfaces, including RS232 and RS485, which are commonly used serial communication methods, and most DTU automated terminals are designed to use serial port data in a “transparent conversion” method, which means that DTU automated terminals can Convert the original data on the serial port into TCP/IP data packets for transmission without changing the original data communication content. Therefore, the DTU automation terminal can be connected to various user equipment that uses serial port communication, and there is no need to make changes to the user equipment.
2. Internally integrated TCP/IP protocol stack
The DTU automated terminal internally encapsulates the PPP dial-up protocol and TCP/IP protocol stack and has an embedded operating system. From a hardware perspective, it can be regarded as a combination of an embedded PC and a wireless MODEM. It has dial-up Internet access and TCP/IP data communication. function.
3. Support automatic heartbeat and remain permanently online
One of the advantages of the 4G communication network is that it supports terminal equipment to be permanently online. Therefore, typical DTU automated terminals are designed to support the permanent online function. This requires the DTU automated terminal to include automatic dialing upon power-on and the use of heartbeat packets to remain permanently online (when When there is no data communication for a long time, the mobile gateway will disconnect the DTU automation terminal and the center. The heartbeat packet is a small data packet sent by the DTU automation terminal and the data center before the connection is disconnected to keep the connection from being disconnected), Supports features such as automatic reconnection after disconnection and automatic redialing.
4. Support parameter configuration and permanent storage
As a kind of communication equipment, DTU automation terminal has a wide range of applications. In different applications, the IP address and port number of the data center, the baud rate of the serial port, etc. are different. Therefore, DTU automation terminals should support parameter configuration, and save the configured parameters in an internal permanent storage device (usually FLASH or EEPROM, etc.). Once powered on, it will automatically work according to the set parameters.
DTU automation terminals have been widely used in electric power, environmental protection, LED information release, logistics, hydrology, meteorology and other industries. Although the applied industries are different, the applied principles are the same. In the future, DTU automation terminals will have more and more application scenarios and their application scope will become wider and wider.