Panel Builder System Integrator

MQTT

February 26, 2018

In the world of Internet of Things (IoT) the main currency is messages. Even as you read this hundreds of thousands of devices are sending status reports, receiving orders (like “turn up the heat”, “measure the room humidity” etc.), storing data from other devices or doing numerous other tasks that make our lives easier. And they all need to exchange information, as without connectivity, their usefulness is immensely reduced.

But with the rapidly increasing number of devices that require Internet to communicate and be useful to individuals, businesses or governments, concerns like preserving bandwidth, ensuring that low-connectivity machines can also transmit data and even preserving battery life of gadgets need to be addressed. That is where MQTT comes in.

 So, What is MQTT?

MQTT stands for Message Queuing Telemetry Transport or MQ Telemetry Transport. It is an open source machine-to-machine (M2M) messaging protocol that increasingly becoming the industry standard for IoT device communication. MQTT is a lightweight protocol, based on a publish/subscribe methodology that can be supported by even small devices in remote, low-connectivity destinations. Designed to breach the gap between the physical world gadgets (phones, sensors, wearables and etc.) with software processing technologies, this code is one of the main reasons for the expected 204.41% increase of IoT connected devices by 2025.

How Does MQTT Work?

Initially, MQTT was developed as a proprietary software in 1999 by Andy Stanford-Clark (IBM) and Arlen Nipper (Arcom, now Cirrus Link). It was designed to carry information from remote oil pipelines through satellite connection and deliver it to the industrial data centers for analysis and storing. As you can imagine preserving both bandwidth and battery power were the two main concerns. Today, these two are still at the core of MQTT. However, it has become the main standard not only for Industrial Internet of Things (IIoT) but also for the smart gear we use in our everyday life.

So, to understand how MQTT works, you need to simply think about your favorite radio or TV channel. We have devices that publish to a broker on a specific topic. Then the broker sorts the data it receives from all publishers and organizes it into subjects. Clients subscribe to different channels and receive only the information about the specific topic they are programmed to listen for.

 
In this line of thought MQTT is really like a radio station – listeners tune in only for the broadcasts they like and the radio has different shows to cater to the needs of a wider audience. Unlike radio, however, this machine-to-machine protocol allows subscribers not only to “listen” but also to publish (broadcast) information. We have a two-way communication channel.

 

What Are the Main Benefits of MQTT for IoT?

Centralized System

As we mentioned the number of IoT devices increases rapidly. Just over a two-year period (from 2015 to 2018), it skyrocketed with over 50% increase. So, the need to manage the strain on bandwidth is tangible. Thanks to the broker device, the amount of data transmitted over the Internet can be limited. Thus, the subscriber is also relieved of the need for huge processors to handle the data.

Clear Message Hierarchy

With this much information flowing seamlessly between broker and devices, hierarchy is a must. That’s where MQTT shines with three different Quality of Service (QoS) levels. These define both the importance and the repetitiveness of a message within their environment. For example, QoS level 0 means that this is a one-time message, most likely a confirmation. It’s priority doesn’t warrant storage or a reply.

Information Flow Preservation

There are two ways for a MQTT session to be terminated. The first one is called a graceful shutdown. It happens when the publisher send a message to the clients, through the broker that it will disconnect. After a graceful shutdown, the client can later reconnect (subscribe to the same channel) easily by just providing its authentication tokens.

Should data transmission end unexpectedly, the broker has a pre-recorded (previously cached) message for all subscribers. Appropriately called “last will and testament”, it provides instructions for the clients on how to proceed if the publisher disconnects abruptly.

 

What Are the Main Challenges of Using MQTT?

Since MQTT was designed for a secure network where the data load was specific to a task at hand, its topic structure (the number of channels that a client can subscribe for) can grow exponentially. However, while the topic tree grows, there is not a clearly defined method to divide it into smaller, easily manageable chunks of logical data. The more information we put into the topic tree, the more it expands and becomes more and more complex. Thus, creating a scalable global MQTT network is still a difficult task.

Another issue that stems from the protocol’s original purpose is security. To provide a 21st-century level of security, MQTT needs to be used along with a mandatory SSL/TLS protocol that provides appropriate data encryption. However, SSL is by all means not a lightweight protocol. Moreover, all security features that are placed on top of MQTT not only inflate the code footprint but also put strain on bandwidth – the one thing MQTT is designed to relieve.

 

Why Is MQTT Important?

Despite of the issues that still leave some questions unanswered, it cannot be denied that the protocol is improving for the better. As developers all over the world work on solving security and data management issues, MQTT is already becoming the standard for Internet of Things communications. It provides many powerful benefits that cannot go unnoticed:

  • Distributes information more efficiently
  • Relieves strain and maximizes available bandwidth
  • Improves scalability
  • Reduces development time

From controlling your home environment remotely to using a messaging system like Facebook Messenger, MQTT is already part of your everyday life. And it will only become more common as technology evolves.

Source: http://kymerasystems.com/2018/02/07/what-is-mqtt-and-why-does-it-matter/

Changing Scene

  • Prev
  Beckhoff Automation is pleased to announce the promotion of Calvin Wallace to the ...
  If you keep customer service in focus all the time, you will not only meet your ...
  Mersen Electrical Power is announcing the launch of a new on line E-Learning portal ...
  Endress+Hauser, a global leader in process measurement and instrumentation, has concluded ...
  Machine builders can now get standalone machines to market faster using a newly updated ...
  Right on the heels of being recognized as one of this year’s Best ...
  ABB announced it has completed its acquisition of GE Industrial Solutions (GEIS), ...
  Schneider Electric, the leader in digital transformation of energy management and ...
  JMP Engineering today announced that it will now be called JMP Solutions. The company, a ...
  Schneider Electric, the leader in the digital transformation of energy management and ...

 

6 FAQs about HARTING Connectors on UL 508A Panels

Harting-PBSI-Mar28-ADVERTORIAL-6-FAQs-UL-508A_Ad_0078_Kerrwil_175x120_FEB2018 (004).jpg

Using connectors on UL 508A cabinets used to be a huge hassle for the panel-builder. As a result, they often chose the older hardwiring solution in the past. Now, HARTING, in partnership with UL, has made it possible to easily connectorize UL 508A panels with existing HARTING products. Get the asnwers for the six FAQs HERE.

 

 

 

anduit: Automating Safety Solutions Since 1955

 

PanduitPanduit is all about connectivity and has been a driving force behind this for over 60 years. Working within the manufacturing, education, healthcare, transportation, and energy sectors, to name but a few, Panduit is working to ensure each of the sectors has comprehensive, stable infrastructure solutions. The solutions offered by Panduit provide physical, electrical and network infrastructure that are leading their clients into the future. Not only are they providing system solutions but have a strong focus on developing connected safety options designed to protect equipment and workers.

 

Read More

 

Tools for the Trade

  • Prev
  The new Crimpfox DUO 10 crimping pliers from Phoenix Contact are perfect  when ...
  As easy as pick, slip and apply!  This intuitive multi-tool is designed to help ...
  Strong Hand Tools®, manufacturer of innovative Strong Hand Tools® Welding Clamps, ...
  Strong Hand Tools®, manufacturer of innovative Strong Hand Tools® Welding Clamps, ...
  Keeping your bins full just got a lot easier – and a lot faster. Each IRWIN ...
Using connectors on UL 508A cabinets used to be a huge hassle for the panel-builder. As a result, ...
  Delta Controls launches support page for CP2000 variable frequency drives and bypass ...
  ABB Automation Builder is the integrated software suite for machine builders and system ...
  Eaton's Power Xpert Branch Circuit Monitor (PXBCM) provides remote access to live energy ...
  The Fluke 438-II Power Quality and Motor Analyzer adds key mechanical measurement ...

Peers & Profiles

  • Prev
  Few industrial innovations have weathered the years as well as heavy duty connectors. ...
As our population grows and consumers continue to rely on technology for both essentials and ...
  Engineers play a key role in the advancement of our infrastructure and the development ...
  Kymera Systems is located in Leduc, Alberta and provides scalable IIoT solutions and the ...
  JAE Automation is proof positive that a cutting-edge, high-tech company can work with ...
  Nivek Automatisation is a forward-thinking company focused on providing advanced ...
Recently Panel Builder & Systems Integrator was invited to Rittal Canada’s Head ...
  New Electric first opened its doors in 1970, in Burlington, Ontario. The electrical ...
  Changes are coming hard and fast to the control and automation sectors, obligating a rise ...
  OPUS Automation was founded in 1998 in Ancaster, On and provides robotic and automation ...

Hannover Messe 2018

German Federal Chancellor Angela Merkel and Mexican President Peña Nieto set the tone on day one of the HANNOVER MESSE/CeMAT double-header. Asked to shake hands with a robot, they both went for the more casual fist bump – a symbol for the relaxed, natural interaction of humans with digitization, robots and machine learning.

"Technology is not about competing with us humans; it's about assisting us. That is the core message conveyed by this trade fair, which has again underscored Hannover's reputation as a global hotspot for the digital transformation of industry," said Dr. Jochen Köckler, Chairman of the Managing Board at Deutsche Messe, at the close of HANNOVER MESSE and CeMAT. 

Read More

 

ATS AutomationATS Automation Tooling Systems Inc. (TSX: ATA) ("ATS" or the "Company") an industry-leading automation solutions provider, today announced the receipt of new enterprise Order Bookings from Bruce Power valued at approximately CAD $60 million. ATS was selected by Bruce Power to design and deliver innovative automated reactor component removal tools for their Major Component Replacement (MCR) project. ATS' solutions will enable Bruce Power to safely and efficiently remove and replace each reactor's 480 fuel channels and calandria tubes to update the reactors for continued safe and long service.

Read More

 

CSAAs the industrial and manufacturing sectors continue the shift from centralized to decentralized operations, the world of production as we know it will change completely. This new era, commonly referred to as the fourth industrial revolution or Industry 4.0, is characterized by—smart manufacturing processes where a plethora of intelligent machines, systems, and networks independently exchange and respond to information to manage production. When it comes to industrial control systems, cybersecurity evaluation becomes a necessary extension of functional safety.

Read More

 

Product News

  • Prev
  The new sensor PRO safety limit switches (series SLS) from Wieland provide safe ...
  HARTING is making it easy to implement Industrial Internet of Things (IIoT) solutions ...
  Emerson today introduced a cost-effective, easy-to-install and simple-to-operate ...
  Festo is addressing the desire of machine designers for more compact control cabinet ...
  With its compact size and flexible configuration possibilities, Festo’s new high ...
  Industry-leading industrial automation solutions provider Omron Automation Americas ...
  Phoenix Contact’s new VAL-US surge protection is Listed to UL 1449 and is available ...
  Balluff's industry-leading IO-Link master portfolio gets a power boost with enhanced ...
  Phoenix Contact is expanding the limits of safety and availability! QUINT POWER now ...
  Balluff's newest ceramic caps extend sensor life and minimize downtime by providing a ...
Kerrwil Publications

538 Elizabeth Street, Midland,Ontario, Canada L4R2A3 +1 705 527 7666
©2018 All rights reserved

Use of this Site constitutes acceptance of our Privacy Policy (effective 1.1.2016)
The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of Kerrwil