Wireless DTU is a major use of the wireless network carriers, the front end of the collected data, a transport device passes through a lossless remote control center. DTU meter either complete the video information, lossless transmission of such large image data, the data acquisition can be completed, remotely modify the data transmission request function.
DTU works wireless
communication between the server and the DTU initiated by DTU end, the server through sending a return or accept the communication terminal responds to the DTU. DTU server end and together form the application system based on wireless network communications. Compared DTU end, the server is attached to more complex applications capable of accepting any DTU initiates a communication request and communication state detection timing link, enabling real-time data collection, database services and other applications.
DTU side needs to know in advance the IP address and port number of the server before you can initiate a communication request, and once communication is established, the server and the DTU end there is no difference.
IP address of the server can be either public IP (fixed IP) can also be obtained through dynamic domain name domain name server.
Server port number usually corresponds to a particular application running on the server, such as TCP 21 port number to be used FTP service, TCP 80 is hypertext server (the Http) use. I.e., the server application supports sending and receiving data through a specific port number.
IP addresses are usually DTU terminal available for network operators were randomly assigned to its internal network IP address, you can access the Internet network through the mobile operator's gateway, the system application to be particularly noted that the wireless gateway provides NAT (network address translation ) port mapping service has a very short aging, so if the need to maintain two-way communication must be set DTU heartbeat data packet transmission timings, thereby maintaining NAT port mapping.
Features DTU
connections: Miracle DTU IOT module with built eSIM 2G AM900E, inserted without an external SIM card, a GPRS network support.
Communication protocols: support for multiple communication protocols connection, supports TCP, UDP and MQTT, user-friendly free choice.
Features: Support After registration packet transmission / heartbeat packet data, the parameter setting module supports remote terminal devices that support parameter configuration mode and transparent mode seamless free switching, IP and DNS domain name supports Direct feature, automatically re-dropped support apparatus establish connectivity.
Beijing miracle Things DTU AM1000P relying on China Mobile's GPRS network platform, with built eSIM 2G module for wireless data communication, real wide coverage, long distance, roaming the country, to provide users with real-time communications network, stable, transparent data transmission. Built-in eSIM technology has obvious advantages in the aspects of the installation, reliability, power consumption and other external SIM card than ever before.
