type

Protocol coding

Description and scene

General agreement

 MQTT

Protocol description: MQTT is a lightweight publishing and subscription information transmission protocol based on TCP / IP protocol, featuring a compact message, light and reliable message, supporting QoS, etc.

 Application scenario: one of the recommended protocols for the Internet of Things industry, which is widely used in intelligent hardware, Internet of vehicles, energy, power and other scenarios.

Modbus TCP

Protocol description: Modbus protocol is an application layer message transmission protocol, including three message types: ASCII, RTU and TCP. By this protocol, the controllers can communicate between each other, via a network (e. g., Ethernet), and other devices.

 Application scenario: it is widely used in the industrial field.

 HTTPS

Protocol description: HTTP protocol hypertext transfer protocol, data transmission based on the request / response model.

 Application scenario: suitable for the device hardware and network bandwidth is sufficient scenarios.

 CoAP

Protocol Description: CoAP (Constrained Application Protocol) is a web-like protocol in the Internet of Things world, using a request / response interaction model. The protocol design is refined, using UDP protocol for data transmission, which is suitable for resource-limited low-power equipment, especially for NB-IoT equipment. Application scenario: It is widely used in low-power devices such as water meters and electricity meters.

 UDP

Protocol Description: UDP (User Datagram Protocol) is a non-connected protocol that does not provide reliability and flow control for data transmission, but has lower latency and less overhead.

 Application scenario: It is mainly used in real-time data transmission and fast communication between devices, including real-time video and audio flow transmission, sensor data acquisition and control signal transmission, broadcast and multicast, etc. The UDP protocol has the characteristics of low latency, less cost, and no connection establishment, which can meet the application scenarios with high requirements for fast transmission and real-time performance in the Internet of Things.

 TCP

Agreement Description: Standards for internal development and adoption. Private protocols are flexible, often used within a company or organization, customized on demand, easy to upgrade, and flexible. The specific implementation requires a manual deployment by the customer.

 GB/T28181

Agreement description: National standard GB / T 28181- -2016 "Technical Requirements for Information Transmission, Exchange and Control of Public Security Video Surveillance Network System" is a national standard in the field of video surveillance.

 Application scenario: video network transmission and device control.

 OPC-UA

Protocol Description: OPC Unified Architecture (OPC Unified Architecture) is an open source, platform-independent standard protocol where devices using different systems can send messages between the client and the server over the network.

 Application scenarios: Manufacturing software for applications such as field equipment, control systems, manufacturing execution systems and enterprise resource planning systems.

 OPC-DA

Protocol description: OPC-UA rather than OPC-UA, OPC-UA is more suitable for remote access, and OPC-DA is suitable for single-system data access. OPC-DA is the real-time data access specification, defining the relevant standards including data value, update time and data quality information.

 Application scenario: Suitable for implementing data exchange between multiple vendor devices and control applications.

 LoRa

Protocol description: LoRa is a low-power LAN wireless standard developed by Semtech company, which solves the technical problem of farther distance than other wireless methods under the same power consumption conditions, and realizes the unity of low power consumption and long distance.

 Application scenarios: mainly in the smart city, smart building, smart home, smart agriculture, wireless industry and other fields.

Industry agreement

 JT/T 808

Protocol description: Communication Protocol and Data Format of Terminal of Satellite Positioning System of Road Transport Vehicles, mainly used for "two passengers and one dangerous" vehicles.

 Application scenario: Transportation industry application.

 HJ212

Protocol description: Data transmission standard protocol used in the environmental protection industry in the Data Transmission Standard for Pollutant Online Monitoring (Monitoring) System.

 Application scenario: Environmental protection industry.

 SL651

Protocol description: Hydrological Monitoring Data Communication Regulation, hydrological monitoring and other equipment need to follow this specification.

 Application scenario: Hydrological monitoring.

 GB3761

Protocol description: it is a national standard electricity meter protocol plug-in, which adopts a new data acquisition technology to convert the real-time working condition data of electricity meters into electrical signals, which is provided to the metering system, and can carry out real-time recording, statistics, meter reading and settlement of electric energy.

 Application scenario: electricity meter.

 IEC104

Agreement Description: IEC104 The Regulation is formulated by the International Electrotechnical Commission. IEC104 The protocol of the IEC101 application service data unit (ASDU) with the network protocol TCP / IP transmission standard, the standard provides the communication protocol basis for the network transmission of remote information. The ASDU of 104 and 101 can guarantee the standardization of the statute and the reliability of communication.

 Application scenarios: electric power, urban rail transit.

 DL645

Agreement description: DL / T 645 is the specification and standard for the physical connection of data exchange between the multi-functional energy meter and the data terminal equipment and the protocol. This equipment adopts the standard specification of DL / T 645-2007 "Multi-functional Energy Meter" proposed by China Electricity Council to realize the information communication between the equipment and the multi-functional energy meter.

 Application scenario: electricity meter.