Features of MQTT industrial router
Features of MQTT industrial router
The full name of MQTT (MessageQueuing Telemetry Transport Protocol) is an abbreviation of Message Queuing Remote Sensing Transmission Protocol. It is a message transmission protocol based on the lightweight proxy publish / subscribe mode. It runs on the TCP protocol stack and provides it with orderly and reliable information. Two-way connection network connection guarantee. 206315 Based on this, the MQTT router is an MQTT protocol installed on the router, so why is it related to the industrial router?
To understand what an MQTT router is, first understand what an MQTT is. The MQTT protocol is a protocol designed for communication of remote sensors and control devices with a large amount of limited computing power and working on low-bandwidth, unreliable networks. The following are its characteristics:
1, Use the publish / subscribe message mode to provide one-to-many message publishing and decoupling applications;
2, There are three types of message publishing service quality: (1) "at most once", the publishing of messages depends entirely The underlying TCP / IP network. Message loss or duplication may occur. This level can be used in the following situations: environmental sensor data, loss of one read record does not matter, because a second transmission will soon take place. (2) "At least once" to ensure that the message arrives, but message duplication may occur. (3) "Only once" to ensure that the message arrives once. This level can be used in situations where duplicate or missing messages can lead to incorrect results in a billing system.
3, Small transmission and low overhead (fixed-length header is 2 bytes), protocol exchange is minimized to reduce network traffic;
4, message transmission is shielded from load content;
5, provides network connection using TCP / IP;
6 Use the Last Will and Testament features to notify interested parties of the client's abnormal interruption mechanism.
Based on the above characteristics, it is more suitable for the current Internet of Things industry and may become an important part of the Internet of Things. The protocol supports all platforms and can connect almost all IoT items with the outside. It is used as a communication protocol for sensors and brakes. Application data transmission in the IoT industry is basically an industrial scenario. Therefore, the requirements for the ability of some equipment to adapt to the environment and the ability to resist interference are relatively high, and industrial-grade equipment has the same requirements for wireless transmission.
Homtecs H series industrial router is an MQTT industrial router, which not only supports 5G / 4G / 3G mobile network, but also is backward compatible with EDGE, CDMA 1X and GPRS networks. It also supports the MQTT protocol and multiple VPN protocols (OpenVPN, IPSEC, PPTP, L2TP, etc.) to ensure the security of data transmission. It supports RS232 (optional RS485) and Ethernet interface, I / O interface (optional) and WiFi function. In this regard, as an important transmission equipment for the Internet of Things, in-depth research, development and performance improvement of industrial routers will also be the main trend of the development of the Internet of Things industry.
