u-blox has released the LEXI-R4, a module customized for size-constrained application requirements. The device is suitable for small asset trackers, such as pet and personal trackers, micro-mobility devices, and luggage tags.
Image: u-blox
The LEXI-R4 module supports all LTE-M and NB-internet of things (IoT) bands, with an RF output power of 23 dBm. It is natively designed to support GNSS AT commands, and its dedicated port enables easy integration with any u-blox M10-based GNSS module, such as the MIA-M10.
Additionally, the module can connect to additional positioning services, such as AssistNow and CellLocate.
The compact size of the module, measuring 16 mm x 16 mm, results from a 40% footprint reduction in dimensions compared to the previous u-blox SARA-R4. Due to its small size, remaining space could host larger antennas, which can improve RF performance, or accommodate larger-size batteries.
Another feature of the LEXI-R4 is its 2G fallback capability. Whenever LTE-M/NB-IoT coverage conditions are not optimal, it continues to function by falling back onto a 2G network. The company said this feature could be helpful in countries where LTE-M/NB-IoT networks have yet to be fully deployed.
U‑blox has launched a commercial internet of things (IoT) Security-as-a-Service offering. Available on both the u‑blox SARA-R4 and SARA-R5 series of LTE-M cellular IoT modules, the service protects data from malicious third parties, both on the device and during transmission from the device to the cloud, u-blox said in a press release.
Both the SARA-R4 and R5 have integrated M8 GNSS receivers.
The IoT Security-as-a-Service provides an out-of-the box onboarding process to cloud IoT platforms to speed up development, shortening time-to-market.
The IoT Security-as-a-Service offering, which is managed via the u‑blox Thingstream service delivery platform, is specifically optimized for low-power, wide-area (LPWA) deployments that use resource-constrained IoT devices. By substantially reducing data overhead and keeping the number of handshakes to a minimum, the service improves power consumption and extends the battery life, a critical metric for most IoT devices.
u-blox acquired Thingstream, an IoT communication-as-a-service provider, in April.
Central to the effectiveness of the solution is a unique symmetric key management system (KMS). Through it, an infinite number of crypto keys can be generated on the fly for each device, rather than having to rely on the storage and management of pre-shared keys (which can add to overall operational complexity and the power budget).
Keys are tied to the hardware and can be triggered from either the module or from the server/cloud, completely eliminating the need to create, deliver, and renew certificates, and bringing significant savings in terms of system cost, operational complexity, and power consumption.
The solution also leverages u‑blox’s Foundation security offering, which comprises fundamental elements that make SARA-R4 and SARA-R5 modules secure by design. These include a unique and immutable device identity that is tied to its root of trust (RoT), which forms the basis for a trusted set of advanced security functionality, including a secure boot mechanism that ensures that the module can only run trusted software. In addition, u‑blox’s proprietary uFOTA feature enables authentication of over-the-air firmware updates.
Among the relevant use cases that u‑blox IoT Security-as-a-Service can support are:
Asset tracking. Data authenticity is essential in such scenarios, as well as secure local storage of collected data and easy secure cloud onboarding. Because tracking devices are usually battery powered, they require extremely energy-efficient secure data transmission.
Connected health/eHealth. In this use case, patient confidentiality is paramount, with only authorized medical staff permitted to access sensitive data. This necessitates a high degree of protection against malware and data tampering.
Industrial monitoring. These solutions need to guarantee the integrity of real-time operational data to increase productivity, avoid downtime, and assure the safety of the workforce.
Building and home automation. Data confidentiality and authenticity need to be maintained, while allowing for data to be shared with trusted stakeholders without compromising customer privacy.
Telematics. In this scenario, the main security risks include denial-of-service (DoS) attacks, device cloning, jamming, etc.
Smart metering. Here, the authenticity of data logged by remote metering units needs to be confirmed to protect billing, and, once trusted communication is established, data transmission needs to be restricted to authorized servers.
“We implemented a true end-to-end concept that protects data from the device to the end user without making it visible to intermediate nodes or platforms, or to service providers. The modules’ symmetric KMS offers engineers a streamlined and scalable alternative to conventional public key infrastructure or pre-shared key arrangements,” says Giovanni Solito, senior product manager, Product Center Services at u‑blox. “And with straightforward onboarding to all the popular cloud IoT platforms, efforts are not taken up by security concerns and operational complexities, but can be focused on speeding up time to market and growing business.”
U-blox, a global provider of leading positioning and wireless communication technologies, has extended its SARA-R4 family of LTE-M / NB-IoT and EGPRS cellular modules to include variants with the hardware and software features necessary to enable end-to-end security features and services for internet of things (IoT) data, devices and ecosystems.
“The new SARA-R422 product series offers superior security protection, industrial output power to grant best coverage even in weak signal conditions, and everywhere location using state-of-the-art u-blox GNSS technology,” said Rado Sustersic, senior product manager, Product Center Cellular at u‑blox. “These represent valuable functionalities tailored specifically to the LPWA IoT market.”
M8 GNSS. The SARA-R422M8S is pre-integrated with the u-blox M8 GNSS (global navigation satellite system) receiver and a separate GNSS antenna interface. This provides highly reliable, accurate positioning data simultaneously with LTE communications.
The module also supports hybrid positioning strategies, in which positioning data provided by satellite constellations is enhanced with data from the u-blox CellLocate service, ensuring that location data is always available everywhere.
The SARA-R4 series is designed for a wide range of mission-critical IoT solutions such as connected healthcare, industrial monitoring, point of sale and vending terminals, tracking and telematics devices, as well as smart lighting solutions and building automation.
Security. Security features include a unique and immutable root of trust (RoT) for each device, as well as access to a scalable pre-shared key (PSK) management system. This provides the foundation for a trusted set of advanced security functionalities to enable data encryption and decryption, both on‑device as well as from‑device‑to‑cloud.
The choice of PSK-based security, rather than the more complex and computationally intensive public key infrastructure (PKI) approach, strikes the right balance between implementation costs and level of security protection for many IoT applications.
Robustness. All SARA-R422 modules provide 23-dBm output power, allowing the end device to properly operate in all network conditions. This means no issues at cell edges, no coverage issues in weak signal conditions, and, even more importantly, no unwanted re-transmission that shortens battery life by increasing transmit time and overall system power consumption.
The series is designed for long working lifetimes in the field, through the inclusion of support for LWM2M, a lightweight machine-to-machine communications protocol ideal for IoT applications with the possibility of updating the firmware of modules already in the field over the air via the uFOTA (Firmware Over The Air) client/server firmware service provided by u-blox.
The u-blox SARA-R4 series will be presented at Embedded World in Nuremberg, Germany, Feb. 25-27, at Hall 3/Stand 3-139.
