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MQTT
MQTT (originally an initialism of MQ Telemetry Transport) is a lightweight, publish-subscribe, machine to machine network protocol for Message queue/Message queuing service. It is designed for connections with remote locations that have devices with resource constraints or limited network bandwidth. It must run over a transport protocol that provides ordered, lossless, bi-directional connections—typically, TCP/IP. It is an open OASIS standard and an ISO recommendation (ISO/IEC 20922). History Andy Stanford-Clark ( IBM) and Arlen Nipper (then working for Eurotech, Inc.) authored the first version of the protocol in 1999. It was used to monitor oil pipelines within the SCADA industrial control system. The goal was to have a protocol that is bandwidth-efficient, lightweight and uses little battery power, because the devices were connected via satellite link which, at that time, was extremely expensive. Historically, the "MQ" in "MQTT" came from the IBM MQ (then 'MQSeries') p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of MQTT Implementations
MQTT is an ISO standard (ISO/IEC PRF 20922) publish-subscribe-based messaging protocol. It works on top of the TCP/IP protocol. It is designed for connections with remote locations where a "small code footprint" is required or the network bandwidth is limited. The publish-subscribe messaging pattern requires a message broker. All comparison categories use the stable version of each implementation listed in the overview section. The comparison is limited to features that relate to the MQTT protocol. Overview The following table lists MQTT both libraries and implementations, along with general information about each. A more complete list of MQTT implementations can be found oGitHub Protocol support There are several versions of the MQTT protocol currently standardized. Below is a list containing the more recent versions of the MQTT protocol, with the organization that standardized them. * MQTT-SN v1.2, standardized by IBM. * MQTT v3.1, standardized by Eurotech and IB ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MQTT Protocol Example Without QoS
MQTT (originally an initialism of MQ Telemetry Transport) is a lightweight, publish-subscribe, machine to machine network protocol for Message queue/Message queuing service. It is designed for connections with remote locations that have devices with resource constraints or limited network bandwidth. It must run over a transport protocol that provides ordered, lossless, bi-directional connections—typically, TCP/IP. It is an open OASIS standard and an ISO recommendation (ISO/IEC 20922). History Andy Stanford-Clark ( IBM) and Arlen Nipper (then working for Eurotech, Inc.) authored the first version of the protocol in 1999. It was used to monitor oil pipelines within the SCADA industrial control system. The goal was to have a protocol that is bandwidth-efficient, lightweight and uses little battery power, because the devices were connected via satellite link which, at that time, was extremely expensive. Historically, the "MQ" in "MQTT" came from the IBM MQ (then 'MQSeries') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine To Machine
Machine to machine (M2M) is direct communication between devices using any communications channel, including wired and wireless. Machine to machine communication can include industrial instrumentation, enabling a sensor or meter to communicate the information it records (such as temperature, inventory level, etc.) to application software that can use it (for example, adjusting an industrial process based on temperature or placing orders to replenish inventory). Such communication was originally accomplished by having a remote network of machines relay information back to a central hub for analysis, which would then be rerouted into a system like a personal computer. More recent machine to machine communication has changed into a system of networks that transmits data to personal appliances. The expansion of IP networks around the world has made machine to machine communication quicker and easier while using less power. These networks also allow new business opportunities for cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andy Stanford-Clark
Andrew James Stanford-Clark is a British information technology research engineer, specialising in telemetry and publish/subscribe messaging. In July 2017 he was appointed IBM CTO for UK and Ireland Previously, he led a research team at IBM. He is a Member of the IBM Academy of Technology, an IBM Master Inventor and visiting professor at Newcastle University. He also serves on the Engineering and Physical Sciences Research Council (EPSRC) peer review college and regularly delivers public talks. Education Stanford-Clark was educated at Stockport Grammar School, Cheshire, and the University of East Anglia, Norwich. He holds a Bachelor of Science (BSc) degree in computer science and mathematics from the University of East Anglia (UEA) and completed his PhD in parallel computing at UEA in 1991. Career Stanford-Clark joined IBM in 1991 in the Communications Software group. Stanford-Clark performed a number of roles within IBM, focusing primarily on parallel processing a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Message Broker
A message broker (also known as an integration broker or interface engine) is an intermediary computer program module that translates a message from the formal messaging protocol of the sender to the formal messaging protocol of the receiver. Message brokers are elements in telecommunication or computer networks where software applications communicate by exchanging formally-defined messages. Message brokers are a building block of message-oriented middleware (MOM) but are typically not a replacement for traditional middleware like MOM and remote procedure call (RPC). Overview A message broker is an architectural pattern for message validation, transformation, and routing. It mediates communication among applications, minimizing the mutual awareness that applications should have of each other in order to be able to exchange messages, effectively implementing decoupling. Purpose The primary purpose of a broker is to take incoming messages from applications and perform some action ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SensorThings API
SensorThings API is an Open Geospatial Consortium (OGC) standard providing an open and unified framework to interconnect IoT sensing devices, data, and applications over the Web. It is an open standard addressing the syntactic interoperability and semantic interoperability of the Internet of Things. It complements the existing IoT networking protocols such CoAP, MQTT, HTTP, 6LowPAN. While the above-mentioned IoT networking protocols are addressing the ability for different IoT systems to exchange information, OGC SensorThings API is addressing the ability for different IoT systems to use and understand the exchanged information. As an OGC standard, SensorThings API also allows easy integration into existing Spatial Data Infrastructures or Geographic Information Systems. OGC SensorThings API has two parts: (1) Part I - Sensing and (2) Part II - Tasking. OGC SensorThings API Part I - Sensing was released for public comment on June 18, 2015. The OGC Technical Committee (TC) app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Message Queue
In computer science, message queues and mailboxes are software-engineering components typically used for inter-process communication (IPC), or for inter- thread communication within the same process. They use a queue for messaging – the passing of control or of content. Group communication systems provide similar kinds of functionality. The message queue paradigm is a sibling of the publisher/subscriber pattern, and is typically one part of a larger message-oriented middleware system. Most messaging systems support both the publisher/subscriber and message queue models in their API, e.g. Java Message Service (JMS). Remit and ownership Message queues implement an asynchronous communication pattern between two or more processes/threads whereby the sending and receiving party do not need to interact with the message queue at the same time. Messages placed onto the queue are stored until the recipient retrieves them. Message queues have implicit or explicit limits on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ejabberd
ejabberd is an Extensible Messaging and Presence Protocol (XMPP) application server and an MQ Telemetry Transport (MQTT) broker, written mainly in the Erlang programming language. It can run under several Unix-like operating systems such as macOS, Linux, FreeBSD, NetBSD, OpenBSD and OpenSolaris. Additionally, ejabberd can run under Microsoft Windows. The name ejabberd stands for Erlang Jabber Daemon (Jabber being a former name for XMPP) and is written in lowercase only, as is common for daemon software. ejabberd is free software, distributed under the terms of the GNU GPL-2.0-or-later. , it is one of the most popular open source applications written in Erlang. XMPP: The Definitive Guide ( O'Reilly Media, 2009) praised ejabberd for its scalability and clustering feature, at the same time pointing out that being written in Erlang is a potential acceptance issue for users and contributors. The software's creator, Alexey Shchepin was awarded the Erlang User of the Year aw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Node-RED
Node-RED is a flow-based development tool for visual programming developed originally by IBM for wiring together hardware devices, APIs and online services as part of the Internet of Things. Node-RED provides a web browser-based flow editor, which can be used to create JavaScript functions. Elements of applications can be saved or shared for re-use. The runtime is built on Node.js. The flows created in Node-RED are stored using JSON. Since version 0.14, MQTT nodes can make properly configured TLS connections. In 2016, IBM contributed Node-RED as an open source OpenJS Foundation project. Node-RED projects See also *Dataflow programming * Visual programming language *Yahoo! Pipes Yahoo! Pipes was a web application from Yahoo! that provided a graphical user interface for building data mashups that aggregate web feeds, web pages, and other services; creating Web-based apps from various sources; and publishing those apps. ... References External links * {{IBM F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Home Assistant
Home Assistant is a free and open-source software for home automation designed to be a central control system for smart home devices with a focus on local control and privacy. It can be accessed through a web-based user interface by using companion apps for Android and iOS, or by voice commands via a supported virtual assistant such as Google Assistant or Amazon Alexa. After the Home Assistant software application is installed as a computer appliance, it will act as a central control system for home automation, commonly referred to as a smart home hub, that has the purpose of controlling IoT connectivity technology devices, software, applications and services which are supported by modular integration components, including native integration components for wireless communication protocols such as Bluetooth, Zigbee, and Z-Wave (used to create local personal area networks with small low-power digital radios), as well as having support for controlling both open and propriet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurotech (company)
Eurotech is a company dedicated to the research, development, production and marketing of miniature computers (NanoPCs) and high performance computers (HPCs). Description Created in 1992, Eurotech is a global company that operates in multiple countries. It follows the technological paradigm of Pervasive Computing. The concept of pervasive or ubiquitous computing, involves miniaturisation and the distribution in the environment of intelligent devices and their possibility of communicating. In this respect, NanoPCs and HPCs are the two major classes of devices that, by connecting to and co-operating, form a computing infrastructure labeled the pervasive GRID or pervasive computing grid. History 1995 Eurotech was the first to introduce a PC/104 module based on the Intel 32-bit 486DX processor. 1997 The company inked agreements with European distributors. Eurotech moved its headquarters to Amaro (province of Udine in North-East Italy) and the company became a joint-stock co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OASIS (organization)
The Organization for the Advancement of Structured Information Standards (OASIS; ) is a nonprofit consortium that works on the development, convergence, and adoption of open standards for cybersecurity, blockchain, Internet of things (IoT), emergency management, cloud computing, legal data exchange, energy, content technologies, and other areas. History OASIS was founded under the name "SGML Open" in 1993. It began as a trade association of Standard Generalized Markup Language (SGML) tool vendors to cooperatively promote the adoption of SGML through mainly educational activities, though some amount of technical activity was also pursued including an update of the CALS Table Model specification and specifications for fragment interchange and entity management. In 1998, with the movement of the industry to XML, SGML Open changed its emphasis from SGML to XML, and changed its name to OASIS Open to be inclusive of XML and reflect an expanded scope of technical work and standar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
