Technical News

Exploring the Power and Potential of IoT: Understanding MQTT Protocol

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At the heart of the Internet of Things (IoT), where devices seamlessly communicate with each other to bring convenience and efficiency into our everyday lives, lies a crucial element that facilitates this interconnectedness – the MQTT protocol.  

What is MQTT? 

MQTT, or Message Queuing Telemetry Transport, is an efficient messaging protocol designed for low-bandwidth, high-latency, or unreliable networks. MQTT was created with the goal of enabling efficient communication to remote devices, making it ideal for IoT applications. 

 

How does MQTT work? 

At its core, MQTT operates on a publish-subscribe messaging model. This model involves three key components: publishers, subscribers, and a broker. 

  • Publishers: Devices that generate data and publish messages to a specific topic. 
  • Subscribers: Devices or applications that receive messages by subscribing to a specific topic. 
  • Broker: Acts as an intermediary between publishers and subscribers. It receives all messages from publishers and distributes them to the appropriate subscribers based on topic subscribers. 

The lightweight nature of MQTT is evident in its minimal overhead operations. Messages are small, typically consisting of a topic and payload. This efficiency makes MQTT well-suited for scenarios where network bandwidth and device resources are limited. 

Key Features and Advantages 

1. Asynchronous Communication: MQTT enables asynchronous communication, allowing devices to send and receive messages independently of each other. This asynchronous nature reduces the need for constant polling (how many times the subscriber contacts the broker), conserving battery life and reducing network congestion. 

 

2. Quality of Service (QoS) Levels: MQTT offers three levels of QoS, providing flexibility in message delivery: 

  • QoS 0 (At most once): Messages are delivered at most once, with no confirmation or acknowledgement. 
  • QoS 1 (At least once): Messages are delivered at least once, guaranteeing that they reach the receiver but allowing for duplicates. 
  • QoS 2 (Exactly once): Messages are delivered exactly once, ensuring both message integrity and order. 

 

3. Last Will and Testament (LWT): MQTT supports the LWT feature, which allows a client to specify a message to be published by the broker in case the client disconnects unexpectedly. This ensures smooth handling of client disconnections and enables applications to react accordingly. 

 

4.Retained Messages: Retained messages are special messages that brokers store and deliver to new subscribers upon subscription. This feature is useful for providing initial state information to newly connected devices or applications. 

Applications of MQTT 

The versatility and efficiency of MQTT make is suitable for a wide range of IoT applications, some of which include: 

  • Smart Home Automation: MQTT facilitates communication between various smart home devices such as thermostats, lights and sensors, enabling seamless automation and remote control. 
  • Industrial IoT (IIoT): In industrial settings, MQTT is utilised for real-time monitoring and control of machinery, predictive maintenance and asset tracking. 
  • Environmental Monitoring: MQTT enables the collection and transmission of environmental data, such as temperature, humidity and air quality, for applications in agriculture, weather monitoring and pollution control. 
  • Healthcare: In healthcare, MQTT can be applied for remote patient monitoring, asset tracking within hospitals and coordination of medical devices and equipment.  

As the IoT continues to grow rapidly, the need for efficient and scalable communication protocols becomes increasingly more important. MQTT stands out as a dependable solution, offering lightweight messaging, asynchronous communication and support for various QoS levels. 

Ensuring Safety and Reliability: Elma Electronics Enclosures in Rail Transportation

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In the dynamic landscape of rail transportation, safety and reliability are essential. As technology continues to advance and shape the use of advanced electronics in rail systems , the need for robust equipment becomes ever more crucial.  In particular, the need to offer protection against extremes of vibration, shock, humidity and electromagnetic radiation. 

Elma Electronics, a leading provider of electronic enclosures, understands these challenges and has developed a range of enclosures engineered from rugged materials, ensuring durability and protection for sensitive electrical components. These robust designs are particularly critical for applications such as signal processing, control systems and communication equipment in rail infrastructure. 

A strength of Elma Electronics enclosures is their ability to provide enclosures tailored to specific rail applications. Whether it’s for onboard control units, communication systems, or trackside equipment, this customisation not only enhances the overall performance of electronic systems but also contributes to the longevity of equipment while providing superior levels of protection. 

The reliable operation of railway systems heavily relies on precise communication and signalling. Electromagnetic interference (EMI) and radio frequency interference (RFI) can disrupt these signals, leading to potential safety hazards. Elma Electronics’ enclosures incorporate advanced shielding techniques to mitigate EMI/RFI, ensuring signal integrity and minimising the risk of communication failures. This feature is particularly crucial for maintaining the safety and efficiency of train control and signalling systems. 

Rail transport is a highly regulated industry with strict standards to ensure the safety and interoperability of electronic systems. Elma Electronics’ enclosures are designed and manufactured to comply with international standards and certifications, providing railway operators with confidence that their electronic equipment is safe and fully conformant. This commitment to compliance enhances the overall safety and reliability of railway infrastructure. 

With rapid technological advancements, it’s essential for railway systems to adapt to new technologies. Elma Electronics offers modular enclosures that allow for easy upgrades and expansion. This modularity ensures that rail companies can integrate new electronic components or technologies without the need for extensive system overhauls. It not only future-proofs rail systems but also contributes to long-term cost-effectiveness. 

In the ever-evolving landscape of rail transport, Elma Electronics stands out as a reliable manufacturer providing rugged and customisable enclosures complying with industry standards. As the industry continues to embrace technological innovation, the future of rail transport is advancing and changing rapidly and the team at Live Electronics is here to help our customers develop safe, efficient and reliable solutions. 

Overcoming Uncertainty in Electronics Sourcing

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If you search online for predictions for the electronics sector for 2024 you’ll quickly find all sorts of companies and analysts anticipating the rise of AI, smart homes, robo-taxis, IIoT and a host of other emerging technologies. Depending on the interests of each contributor, you’ll discover that all or any of these technologies may, or may not, drive market growth.  Conversely, a number of commentators are suggesting that we may see a period of market stagnation this year, either in the first six months or possibly right through to 2025. 

Predicting the future is notoriously difficult, especially at a time where geopolitics are becoming increasingly unpredictable, with growing conflict and the possibility of further supply chain disruption around the globe. 

Indeed, this year in particular is fraught with factors that are likely to have significant impacts on market confidence and trading conditions.  For example, the tragic situation in the Middle East is unlikely to improve in the immediate future, while the war in Ukraine rumbles on. Politically, there will be elections in a number of countries, with around 60% of the global population potentially being involved. Some elections, such as the presidential election in Russia are a foregone conclusion, with others in the United States and UK later in the year are less predictable. Whatever the outcomes, it’s safe to say that the level of uncertainty in the market, which will only be exacerbated by issues such as climate change, raw material supplies and skills shortages, are going to make it increasingly difficult for companies to plan effectively for future growth.  

We work at the interface between the manufacturers and consumers of electronic and electromechanical components and devices. That gives us a unique perspective. We know how challenging it can be for our manufacturing partners to plan for market demand, while our close relationship with customers across industry means that we understand their need for predictable and timely supplies of components at stable costs.   

It’s a balancing act for all of us! 

One of our core skills is our ability to help customers minimise uncertainty. We do this, for example, by offering multiple options for as many products as possible. This means that for each order we can normally provide a choice of identical components from different manufacturers. So, if for any reason your first-choice product is unavailable or on a long lead-time, we can offer components that are sufficiently close in terms of specification and performance to meet your immediate design requirements. 

This flexibility allows us to help you find the best solution to your needs, at the optimum lead-time, cost and specification. To help still further, we can also hold stock for specific projects, or offer scheduled orders that match your manufacturing programme. 

To learn more, or discuss your next project, please get in touch. 

The Spark Behind Electronic Connectors: Brass, Silver & Gold Plated Contacts

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Brass Contacts:

Brass, an alloy of copper and zinc, has been a reliable choice for electrical connectors due to its affordability and excellent conductivity. Its mechanical strength and durability make it ideal for applications where connectors may experience frequent mating and un-mating cycles. Brass contacts are commonly found in connectors used in automotive and industrial applications. 

Silver Plated Contacts:

When high levels of conductivity are critical then silver emerges as a top choice for contact material. Silver offers superior electrical conductivity compared with brass and other materials. This makes connectors with silver contacts highly desirable for applications where low electrical resistance is crucial, such as high-frequency and high-power environments. 

However, despite its exceptional conductivity, silver does have some drawbacks. It is more susceptible to oxidation, which can lead to increased contact resistance over time. To try and combat this issue, manufactures often apply various coatings or plating techniques to enhance durability and longevity of silver contacts. 

Gold Plated Contacts:

Gold contacts offer excellent conductivity while maintaining a reliable connection over time. Gold is renowned for its resistance to corrosion and tarnishing coupled with excellent resistance to both elemental and electrical degradation. This makes them particularly suited for applications where signal integrity is paramount, such as aerospace, medical devices, and high-end audio equipment. 

Gold plating over brass prevents it from corroding or oxidising, ensuring stable and low resistance electrical connections. Although gold is more expensive than brass or silver, its longevity and reliability help to justify the extra cost, especially in critical applications where performance cannot be compromised. 

In the movement of electrons within electronic systems, the choice of contact materials in connectors plays a vital role. Whether it’s the sturdy properties of brass, the exceptional conductivity of silver, or the reliability of gold, each material has its unique strengths dependent on the application. The selection of the appropriate contact material depends on the specific requirements of the electronic system it is being used within, while balancing factors such as cost, availability and longevity.  

Contact us today for expert advice on which contact material would be best for your application and to discover the great choice of products that we can provide! 

Understanding IDEC’s E-stop ‘Safe Break Action’ Feature: Enhancing Safety in Industrial Environments

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In the fast-paced world of industrial automation, safety is paramount. With machinery and processes becoming increasingly complex, ensuring the well-being of workers and the reliability of equipment is a top priority for businesses. This is where IDEC’s ‘Safe Break Action’ technology comes into play, offering a robust solution to enhance safety in industrial environments. 

IDEC E-stop, Emergency Stop

What is an E-Stop? 

An emergency stop, or E-stop, is a safety mechanism designed to halt machinery or processes immediately in emergency situations. It’s a critical component of any industrial setup, allowing operators to swiftly intervene, turn off machinery fast, and prevent accidents or injuries. E-stops need to be easy to use, endure harsh factory conditions and deliver peace of mind.  

E-stops work by signalling a safety device, such as a safety relay, to cut the power to a machine or process.  Traditionally, the terminals within an E-stop are held in a closed position. This is referred to as a Normally Closed (NC) switch. On pressing the E-stop, the contacts disengage, stopping the flow of power and isolating the machine or circuit. Latches maintain the separation of the contacts until the operator resets the switch, typically through a pulling or twisting motion. However, one challenge with conventional E-stop systems is that they may not always provide fail-safe operation if the contact blocks within the switch are, for example, misaligned or incorrectly fitted. 

IDEC’s Solution: ‘Safe Break Action’ 

IDEC, a leading manufacturer of industrial automation and control solutions, addresses this challenge with its E-stop ‘Safe Break Action’ feature. This technology ensures fail-safe operation even in the rare event of contact block failure. 

IDEC’s E-stops are designed with a positive opening mechanism, also known as ‘Safe Break Action’. This means that the E-stop contacts have the spring pressure in the opposite direction meaning it will always fail in the safe position and cannot be defeated by welding or sticking contacts, thus ensuring reliable and consistent operation. 

These E-Stops are also available with 1 to 4NC contacts, depending on the series, and can include 1NO monitor contact to ensure no faults are missed. These additional contact options also mean that these E-stop switches can be used in Level 4 safety category applications. 

To conclude, IDEC’s E-stop ‘Safe Break Action’ feature represents a significant advancement in industrial safety technology. By combining fail-safe operation with ‘Safe Break Action’, IDEC provides a reliable and robust solution to enhance safety in industrial environments. As businesses strive to create safer workplaces and comply with regulatory standard, investing in advance safety technologies like IDEC’s E-stop switches in a proactive step towards achieving these goals.  

Beehive Management with Weipu’s SP Series Connectors

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Beekeeping requires precision and care, and integrating technology has made this easier and more efficient, helping to ensure the health and productivity of a hive. Weipu’s SP Series connectors have emerged as a linchpin in hive management advancement. 

The Challenge: Beehive Monitoring in a Digital Age 

Beehives are not merely wooden boxes; they are sophisticated ecosystems that require monitoring and management. Modern beekeeping practices increasingly rely on technology to optimise hive conditions and maximize honey production, all while ensuring the well-being of the bees.

However, integrating electronic monitoring systems into beehives poses challenges, especially in demanding outdoor environments where the beehives are situated. Incorporating electronic monitoring systems into beehives presents obstacles, particularly in harsh outdoor settings where the hives are. These environments have fluctuating temperatures, varying humidity levels, and the accumulation of pollen, wax, honey, and other debris within the hive. Given their IP68 rating, Weipu SP Series connectors are perfect to use in such conditions, ensuring reliable operation despite the challenges they may encounter. 

 

The Solution: Weipu’s SP Series Connectors 

The electronic monitoring systems comprise of sensors to measure environmental conditions, including temperature and humidity, along with instruments such as audio recording to detect the risk of a swarm developing. These are linked wirelessly to a provide beekeepers with a 24/7 real-time view of their beehives. 

Weipu’s SP Series connectors offer a solution to the challenges of beehive monitoring. Their IP68 rated waterproof design ensures reliable performance, even in the harshest outdoor conditions. With gold plated contacts, they provide stable and secure connections critical for accurate data transmission. 

 

Case Study: Beehive Monitoring System Integration 

  1. Sensor Integration: Temperature, humidity, and weight sensors are integrated into the beehives to monitor environmental conditions and hive activity.
  2. Connector Installation: Weipu’s SP Series connectors facilitate the seamless connection of sensors to the monitoring system. Their easy-to-use design simplifies the installation process, ensuring that the transmission of data from the sensor is consistent and reliable, so that the information gathered can be used effectively by the beekeeper.
  3. Data Transmission: The gold-plated contacts of the SP Series connectors ensure stable data transmission, enabling real-time monitoring of hive conditions from a central dashboard. 

 

The Results

  1. Enhanced Hive Management: With real-time data on temperature, humidity, and hive weight, beekeepers can make informed decisions to optimise hive conditions and improve bee health. 
  2. Increased Honey Production: By monitoring hive activity closely, beekeepers can identify factors affecting honey production and implement targeted interventions, leading to higher yields. 
  3. Improved Sustainability: Weipu’s SP Series connectors, with their durable design and reliable performance, contributes to the sustainability of the beekeeping operation by reducing maintenance needs and ensuring long-term health of the hive. 

 

 As part of the latest beehive monitoring technology the advanced Weipu connectors have allowed beekeepers to use technology to aid hive management. By providing reliable connectivity in challenging outdoor environments, these connectors help beekeepers to optimise hive conditions, increase honey production, and ensure sustainable beekeeping practices.  

Customised EMC filtered D-Sub connectors now available from Live Electronics

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The new filtered D-Sub connectors from Deltron AG are available as standard components, or can be custom-engineered in low and high volumes to match customers’ exact specification.

Live Electronics’ Managing Director, Luke Hartley, explains,

“The choice of standard options is extensive, so most customers will be able to find precisely what they need from our normal product list.  For specialised applications or product designs with a unique configuration, we work with the engineers at Deltron AG to develop customised solutions.  Depending on complexity this can generally be achieved in relatively short timeframes.”

The standard connectors are compliant with MIL-C-24308 and IEC 60807 (DIN 41652) standards.  They are available with a choice of filter values from 330pF to 6,800pF, with the option of 9, 15, 25 or 37 poles in plug or socket configurations, and with straight, 90 degree or SMD contacts in solder pin, solder cup or press-fit variations. 

Deltron filtered D-Sub connectors are available with either a C-Planar filter, with Planar chip capacitors, or PI-tubular ceramic capacitors.  In each case, the construction of the connector is designed to ensure complete HF-tightness, combined with mechanical stability, high quality contacts and excellent signal capabilities. 

Waterproof industrial RJ45 Ethernet panel mount connectors from Live Electronics

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Manufactured by GT Contact, the new connectors are rated to IP68, provide fast data transfer Cat6 speeds and are available with a wide range of options. This makes them ideal for use in equipment designed for demanding industrial applications, from factory-floor automation and control, to chemical, offshore and marine equipment.

The new connectors are available with either thermoplastic (PA66) housings, which offer IP67 protection, or metal (nickel-plated copper alloy) housing, with IP68 protection. All the panel mount connectors are rear potted to maintain the integrity of the panel seal even when the connector is unmated; sealing caps are also available if required.

Gold plated contacts are used throughout, for optimum and consistent data transfer speeds, with EMI/FRI shielding being fitted as standard.

 

The new RJ45 connectors are available with a choice of options, for example being supplied as a coupler or with PCB-mount or pig-tail terminations. The connectors are designed for 20.75mm diameter or 20.75 x 19.2mm D-style panel cut-outs, with a choice of bayonet or screw connections.

Luke Hartley, Managing Director of Live Electronics, explains

“GT Contact is a specialised manufacturer of high performance water and weather-proof connectors. Their products are used in some of the most challenging industrial applications around the world, where they have built an outstanding reputation for quality, reliability and, where required, compliance.”

Is this the world’s smallest industrial 2-axis Hall Effect joystick?

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Live Electronics, the specialist distributor of rugged industrial electronics products, has introduced what the company believes is the world’s smallest 2-axis Hall Effect joystick.  Measuring just 17.5mm high above panel x 18mm in diameter, the new TS2 joystick is an IP67, analogue self-centring device, which is designed for use with remotely operated equipment, robotics and automation systems, drones and CCTV controllers.  

TS2

The TS2 joystick is based on proven Hall Effect technology, providing accurate, easy to control 12-bit resolution in both the X and Y axes.  The joystick offers excellent tactile feedback and has been engineered for a minimum of 2.5 million actuations.  It can be supplied with either two open or two gated limiters, a choice of circular convex or concave, castle or flat single–axis (Y) style caps, and fits a standard 12.6mm panel cut-out with the option of a control-grip mount. 

Read more about The Hall Effect here

The new joystick is rated for a supply voltage of 5V and is available with pre-wired JST 28AWG cable or potted terminations.  Operating temperature is between -40 to +85°C, while the TS2 complies with EN61000 electromagnetic compatibility and SAE J1455 vibration and shock testing standards. 

The TS2 is manufactured in California by Ruffy Controls and is part of the company’s extensive range of industrial miniature and fingertip joysticks and switches.  Live Electronics is the company’s specialised industrial distributor in the UK.  

Rugged IP67 & IP68 USB-C connectors from GT Contact

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Waterproof IP-rated USB-C connectors

New from Live Electronics is the latest range of rugged waterproof USB-C connectors.  Manufactured by GT Contact, the new connectors meet IP67 and IP68 specifications, are available with tough thermoplastic (IP67) or metal (IP68) housings, and in a choice of panel mount, cable mount or cable to cable (in-line) versions.   

The new USB-C connectors have been designed for use in a wide range of demanding industrial and process applications, from oil and gas, marine and transport, to power generation, industrial controls and robotics or automation systems. 

The new connectors incorporate screw or bayonet twist and lock couplings, for 16mm panel cut-outs.  Metal versions feature high quality nickel-plated zinc-alloy bodies, with gold-plated stainless-steel connector housings and gold-plated copper-alloy contacts for optimum signal integrity and long-term reliability. 

Panel mount versions can be supplied as DIP pin or be pre-wired with USB-C plug or socket terminations, while rear potting ensures that system electronics are fully protected, even when the USB-C connector is unmated or the optional sealing cap is removed.  Data transfer speeds are typically up to 10Gbps and operating temperatures are from -40°C to +85°C. 

Luke Hartley, Managing Director of Live Electronics, explains that,

“Although we already have an extensive range of rugged USB connectors, many of our OEM customers require IP67 and IP68 rated USB-C devices for the latest generation of electronic systems that are designed for use in particularly demanding applications.  With our long-standing relationships with leading electronic component manufacturers around the world we’ve been able to source what we believe is an outstanding range of tough USB-C connectors, which we can supply in a wide choice of variants to meet almost all customer needs.”

Watch the 30-minute water immersion test!

Rugged, reliable, quality DIN rail terminal blocks from Degson

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DIN rail terminal blocks available from Degson

Degson manufactures an extensive range of DIN rail terminal blocks.  These are designed for use throughout industry – from industrial automation and control, to marine, rail, renewables and just about everything in between.  In each case, Degson DIN rail terminal blocks offer an exceptional combination of quality, functionality and reliability even in the toughest environmental conditions. 

This is why we’ve extended our selection of Degson products, to give all our customers the best possible choice. 

Take a look at three of the latest product series, all of which are available from us on short lead-times:

  • DS push-in terminal blocks provide secure quick-fit, quick-release connections, eliminating the need for tools.  They offer excellent resistance to shock and vibration, twin-channel bridge positions and standard test holes for fast circuit checking, plus options such as electrical protection against the risk of short-circuits or overload.   
  • DC steel screw terminal blocks feature robust steel cage wire clamps, with high conductivity copper alloy contactors.  They are compact, to save space in control cabinets, are designed to be used at temperatures from -40°C to +105°C, and have a UL94V-0 flame retardant rating. 
  • WS spring-cage terminal blocks incorporate reliable spring-cage connection technology, providing outstanding resistance to shock and vibration, with a constant spring compression force.  Ideal for use with solid, stranded or ferrule connectors, the WS series also features large identification plates, for top or side mounting. 

All three product series meet the latest standards for electrical safety, including UL accreditation, and are available with a wide range of accessories. 

New IDEC E-stops boost machine safety

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Safe-Break emergency stops that prioritise safety and minimize risks

We’ve recently introduced the latest range of IDEC X-Series Safe-Break emergency stop buttons.  Designed to offer the highest levels of machine and operator safety, the new E-stops use an innovative design that stops a machine the moment an operator hits the emergency stop button.  The IDEC E-stops will also immediately shut-off power if a contact block or actuator is damaged or incorrectly installed. 

With traditional E-stops normally closed (NC) contacts are held in place by spring pressure.  This effectively maintains them in a closed position until actuated, when the pressure is released.  There is therefore the risk that incorrect installation or excessive force in an emergency can break or dislodge a vital part, preventing the contacts opening; the subsequent results can potentially be catastrophic. 

By comparison, the patented Safe-Break technology deployed in the X-Series effectively reverses the direction of applied energy, with spring-pressure being used to ensure that the NC contacts will open if the emergency switch is damaged, or the contact blocks separate due to excessive force.  This is simple, effective and completely safe. 

X-Series E-stops also feature a combined push-to-lock and pull or turn to reset button.  Competing devices normally only offer one option or the other, meaning that OEMs have to hold more stock and specify alternative parts for different types of machines. 

The X-Series has UL approval.  Depending on the product version, this includes NISD and NISD2 approvals, plus certification for use in machine systems where Category 0 or Category 1 stop functions are required (as defined in ANSI/ NFPA79 Electrical Standard for Industrial Machinery). 

We have a wide range of IDEC E-stops in stock, with non-stock items generally being available on short lead-times.  All products are backed by our comprehensive technical and customer support service.