u-blox LEXI-R4 LTE-M/NB-IoT module

The u-blox LEXI-R4 module has been customised for size-constrained application requirements. The compact (16 x 16 mm) module supports all LTE-M and NB-IoT bands with an RF output power of 23 dBm, also offering the possibility to operate on a 2G network. The most common use cases comprise small asset trackers, like pet and personal trackers, micromobility devices and luggage tags. Its versatility also enables it to encompass other applications, such as alarm systems, vending machines and stolen vehicle recovery.

The device was conceived for size-demanding designs that proved challenging for previous modules, although still providing the same capabilities. The compact size results from a 40% footprint reduction in dimensions compared to the previous u-blox SARA-R4. The gained space can be used to potentially host larger antennas, which can improve RF performance, or to accommodate larger-size batteries.

Another prominent feature is the module’s 2G fallback capability. Whenever LTE-M/NB-IoT coverage conditions are not optimal, it keeps functioning by falling back onto a 2G network. This feature is convenient in countries where LTE-M/NB-IoT networks have yet to be fully deployed.

Natively designed to support GNSS AT commands, the product is also ready for GNSS bundling. Its dedicated port enables easy integration with any u-blox M10-based GNSS module, hence offering good performance and low power consumption. The module can also connect to additional positioning services such as AssistNow and CellLocate, and offers a single SKU with global LPWA coverage that simplifies logistics.