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Espressif ESP32 Bluetooth Vulnerability

A newly discovered vulnerability in Espressif’s widely used ESP32 Bluetooth chips, identified as CVE-2025-27840, has raised security concerns across the IoT industry. The flaw stems from 29 undocumented commands within the chip’s Bluetooth Host Controller Interface (HCI), which could enable attackers to spoof trusted devices, access data without authorisation, pivot to other devices and establish long-term persistence.

With a CVSS score of 6.8, the risk is categorised as “medium,” but given the vast number of devices using the ESP32 chip, ranging from smart home gadgets to medical equipment, the potential impact is substantial. Exploiting this flaw generally requires physical access to a device’s USB or UART interface, somewhat limiting the attack scope. However, attackers could still conduct impersonation attacks, bypass security audits, and permanently compromise sensitive devices.

Espressif has acknowledged the issue and pledged to release a software patch while documenting all vendor-specific HCI commands to improve transparency. In the meantime, security experts recommend conducting audits, implementing additional safeguards, monitoring Bluetooth activity and staying updated on Espressif’s patches.

Faraday RF-Shield Bags

We have Faraday Radio Frequency RF shield nylon bags in stock. Faraday bags can be very useful during development when you want to bring beacons in and out of range or need to hide development beacons. They are also useful during setup when you want to shield un-commissioned beacons temporarily.

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The bags we sell are high spec and were originally designed for military, intelligence and police agencies to prevent seized devices from being remotely altered. They shield WiFi, Bluetooth and phone signals. They can also be used with phones and tablets for personal anti-radiation health reasons, preventing tracking or avoiding communication when you don’t want to be interrupted.

Game-Based Museum Inquiry Learning Using Beacons

New research explores the use of game-based inquiry learning in a maritime science museum, integrating emerging technologies to enhance visitors’ learning experiences. The study introduces MUSEON, an ontology-driven game-based learning (GBL) application designed to engage visitors in guided inquiry activities about museum exhibits.

Beacons were used to enhance the contextual awareness of the learning experience. BLE beacons were strategically placed around the museum to detect visitors’ locations and provide relevant inquiry tasks and hints based on their proximity to exhibits. When a visitor entered a beacon’s range, the MUSEON application activated corresponding learning tasks, helping users engage with exhibits in an interactive and structured manner. The beacons ensured that visitors received context-specific content, allowing them to explore the exhibits dynamically rather than passively. By integrating BLE beacons with an ontology-driven learning approach, the study demonstrated how emerging technology can support situated learning and improve engagement in museum environments.


The findings indicate that visitors using MUSEON had a more engaging and effective learning experience, with 71.6% of participants expressing satisfaction with the game-based approach. The experimental group also outperformed the control group in learning assessments, scoring an average of 74.6% compared to 56.4%. The study highlights the potential of using context-aware technologies, such as Bluetooth Low Energy (BLE) beacons, to facilitate location-based inquiry learning in informal educational environments like museums.

Beacon Compatibility

We previously wrote a bit about beacon compatibility where we concluded that phone compatibility is more of an issue than beacon compatibility and that you might choose an Apple MFi certified beacon if you wanted additional assurance. However, what does MFi mean?

Certified beacons meet Apple’s beacon specifications. There was a time that these specifications were secret and only available to MFi partners. However, these have since become available after you have ok’d an agreement. If you wish to view them, go to the iBeacon for Developers web page and click on Download Artwork and Specifications.

Bluetooth Technology is Driving IIoT

Bluetooth technology is playing a transformative role in the Industrial Internet of Things (IIoT), facilitating the digitisation and networking of manufacturing operations to address economic, supply chain and regulatory challenges. This wireless technology enables comprehensive data collection, monitoring, and analysis across interconnected devices, which are critical to the automation and efficiency goals of Industry 4.0.

Bluetooth Low Energy (LE) technology has growing importance in industrial settings. According to the 2023 Wireless Connectivity Market Analysis by Techno Systems Research and ABI Research, the market for Bluetooth-enabled industrial devices is projected to grow significantly, from 143 million annual unit shipments in 2023 to over 611 million by 2028, with a compound annual growth rate (CAGR) of 34%. Real-time location systems (RTLS) and asset tracking represent the largest market opportunity due to the availability of low-cost Bluetooth LE tags offering high-accuracy location services.

The second-largest growth area is commercial building automation, which is forecast to expand rapidly, from 8.5 million unit shipments in 2022 to over 135 million by 2028. Other notable markets include Bluetooth LE condition monitoring and predictive maintenance, expected to reach 7 million and nearly 10 million annual unit shipments respectively by 2028.

Robotics is another significant area of opportunity, where Bluetooth LE is enabling autonomous navigation and robot-to-robot communication. Mobile robots, in particular, stand out as they can relay crucial operational data such as position, load, and battery levels, while also allowing for dynamic updates to tasks and routes via Bluetooth-connected devices.

Key advantages of Bluetooth technology in industrial applications include its low power consumption, resilience to interference, robustness, and integration with existing mobile, computing, and IoT infrastructure. Its ability to provide real-time insights into factory operations through extensive data collection, combined with advanced wireless System-on-Chip (SoC) technologies, facilitates improved decision-making and operational adaptability.

This technological advancement extends beyond operations, linking the design and manufacturing processes. By connecting tools like CAD directly to machine tools, Bluetooth enables seamless communication to streamline production, reduce bottlenecks, and enhance product design for simpler manufacturing. These capabilities yield higher productivity, reduced product failures, cost savings, and environmental benefits, revolutionising not only how products are made but also how factories are managed and adapted.

New BluetoothLEView by NirSoft

NirSoft has released a new application for Windows called BluetoothLEView. This lightweight tool is a standalone .exe file that does not require installation, making it easy to use on Windows 10 and Windows 11.

BluetoothLEView detects and monitors nearby Bluetooth Low Energy (LE) devices, including beacons. It displays detailed information such as the device’s MAC Address, Name, Signal Strength in dBm (RSSI), Manufacturer ID, Manufacturer Name, Service UUID, first and last detection times, the number of times the device has been detected and more.

To use BluetoothLEView, your PC or laptop must have an internal Bluetooth adapter that supports Bluetooth LE. You can check if your system is compatible by opening Device Manager, selecting Bluetooth, and looking for “Microsoft Bluetooth LE Enumerator” in the list of devices.

If your computer does not have an internal adapter, you can plug in an inexpensive USB Bluetooth adapter that supports Bluetooth Low Energy.

How Beacons Revolutionise Logistics and Supply Chain Management

Logistics and supply chain operations are constantly seeking innovative technologies to enhance efficiency, accuracy, and security. Beacons have emerged as a transformative solution, enabling a range of applications across the industry. Here, we explore how beacons are revolutionising logistics and supply chain management.

Real-Time Asset Tracking

Beacons allow for the seamless tracking of assets, ranging from raw materials to finished products, as they navigate through the supply chain. This real-time visibility helps organisations monitor the location and movement of shipments, optimise logistics processes and mitigate risks of loss or misplacement. By providing continuous updates, businesses can make more informed decisions and ensure the smooth flow of goods.

Enhanced Inventory Management

Inventory accuracy is a critical component of supply chain efficiency, and beacons play a key role in automating stock level monitoring. By reducing reliance on manual checks, they provide up-to-date insights into inventory levels, enabling businesses to reorder efficiently and avoid issues like stockouts or overstocking. This automation not only improves operational efficiency but also reduces costs.

Safeguarding Perishable Goods

For goods that are sensitive to environmental conditions, such as food or pharmaceuticals, beacons equipped with sensors monitor variables like temperature, humidity and light exposure. This ensures that items remain within safe conditions throughout their journey, maintaining quality and compliance with industry standards. Such monitoring is particularly vital for the cold chain, where temperature control is paramount.

Warehouse Optimisation

Within warehouses, beacons track the precise location of items, simplifying the process of locating goods and optimising storage layouts. By automating stocktaking and improving workflow, beacons reduce the time spent searching for items and enhance overall warehouse efficiency. This leads to faster order fulfilment and better resource management.

Improved Fleet Management

Beacons also bring significant advantages to fleet management by tracking the position and condition of vehicles in real-time. This data allows logistics managers to optimise routes, improve dispatch accuracy, and maximise vehicle utilisation. Enhanced visibility of fleet operations translates into cost savings and improved delivery performance.

Predictive Maintenance for Equipment

The health of equipment such as forklifts, cranes and conveyor belts is crucial for uninterrupted operations. Beacons monitor key metrics related to equipment performance, enabling predictive maintenance that prevents breakdowns. By receiving timely alerts when maintenance is due, companies can reduce downtime and extend the life of their machinery.

Ensuring Worker Safety

In large logistics facilities, beacons are used to monitor the location of personnel. This allows managers to identify potential hazards and respond to incidents promptly. By providing alerts when workers enter restricted or high-risk areas, beacons contribute to a safer work environment and help mitigate accidents.

Supporting Cold Chain Logistics

Cold chain logistics, essential for products like food and medicine, relies heavily on temperature control. Beacons provide continuous environmental monitoring, ensuring that goods are stored and transported under the correct conditions. This safeguards product quality and maintains compliance with stringent industry standards.

Enhancing Cargo Security

Cargo security is a top priority in logistics, and beacons offer robust solutions by tracking goods within secure zones and sending alerts if items are moved without authorisation. This level of monitoring reduces the risk of theft and bolsters security protocols, particularly for high-value shipments.

Using Support Vector Regression (SVR) with Beacons

A new study (pdf) explores optimising Bluetooth Low Energy (BLE) beacon-based indoor positioning systems using support vector regression (SVR). It addresses the challenge of accurately identifying building occupants’ locations in real time, a critical requirement for applications such as emergency evacuations and asset tracking. Traditional methods, including trilateration and RSSI-based techniques, can face limitations like signal interference and non-line-of-sight issues.

The research adopts a fingerprinting method that uses pre-trained SVR models to improve positioning accuracy. BLE beacons, which are cost-effective and energy-efficient, were deployed across a controlled environment, and extensive RSSI data was collected and pre-processed. The model’s hyperparameters were fine-tuned to achieve optimal performance. Experimental results demonstrated a significant improvement in accuracy, with the lowest root mean squared error (RMSE) recorded as 0.9168 feet.

The findings underscore the potential of machine learning, particularly SVR, in enhancing the reliability of indoor positioning systems. This study provides a benchmark for future research, highlighting its practical applications in emergency scenarios and the advantages of BLE technology in such implementations.

Digital Manufacturing on a Shoestring

In a previous post we asked ‘What is Productivity?’ and shared how the first wave of IT productivity related to cloud computing, customer relationship management (CRM) systems and enterprise resource planning (ERP) was only taken up by the top 5% frontier companies.

We explained how IoT, 4IR and AI machine learning will improve productivity but again, likely only for frontier companies. The difference this time is that the newer technologies will have more far reaching consequences. The frontier companies will further extend their reach over the laggards. The majority of the 5% are large companies with large budgets who are able to engage consultances such as IBM, Deloitte, Atos, PwC, WiPro, Accenture and KPMG. But what of the small to medium enterprises (SMEs)? Can they compete?

In most countries, a large proportion of companies are small to medium size. For example, in the UK, the Office for National Statistics says 98.6% of manufacturers are (SMEs). These organisations are more price sensitive and usually don’t have the luxury of significant financial resources for engaging the top consultancies and implementing their expensive solutions. Small and medium sized organisations have previously found it difficult to digitise due to the lack of availability of reasonably priced solutions.

However, solutions doesn’t have to be expensive. Low cost sensors such as Bluetoooth beacons, motion cameras, consumer AR can be combined with affordable cloud services to create solutions on a ‘shoestring’ budget. This is the aim of the University of Cambridge and University of Nottingham’s ‘Digital Manufacturing on a Shoestring’ initiative. The Institute for Manufacturing (IfM) is helping manufacturers benefit from digitalisation without excessive cost and risk. View the project’s latest news.

Read about Beacons in Industry and the 4th Industrial Revolution (4IR)

What is Productivity?

Our article on the Benefits of Beacons mentions that the data from beacons can enhance productivity. However, what does this mean? ‘Productivity’ seems like a nebulous term that means nothing. Can beacons, and indeed IT in general, increase productivity? Has there been any evidence for this in the past? Will things such as IoT, 4IR and AI machine learning actually improve productivity?

A great place to start quantifying productivity is the France-based Organisation for Economic Co-operation and Development (OECD). They have lots of open data that shows recent productivity gains have been small for most countries. This is a puzzle.

Why hasn’t technology improved productivity significantly? There’s a great post at Focus Economics on 23 economic experts weigh in: Why is productivity growth so low? There’s also speech on Productivity puzzles (pdf) given by Andrew G Haldane, Chief Economist, Bank of England with lots of charts. The UK’s ‘Be the Business’ organisation tasked with driving better productivity also has a useful paper (pdf) on How good is your business really?

The key theme is that not many businesses have adopted earlier productivity improving tools such as cloud computing, customer relationship management (CRM) systems and enterprise resource planning (ERP). There are sectoral patterns of productivity improvement that tend to delineate ‘frontier’ and ‘laggard’ companies. There’s a very long tail of laggard companies that weights the numbers. There’s a fear of technology brought about by inertia and poor management.

Some countries such as Germany have slightly higher productivity but that’s considered to be due to better vocational education rather than technology.

There have been recent improvements in productivity but only for the top 5% frontier companies. These companies have embraced technology as part of improving operational efficiency, future planning, employee engagement, leadership and commercial excellence.

We anticipate IoT, 4IR and AI machine learning will improve productivity but again, only for frontier companies. The difference this time is that the newer technologies will have more far reaching consequences. The frontier companies will further extend their reach over the laggards. This might have existential consequences for many of the laggards.