Smallest LTE-M/NB-IoT module for size-demanding designs

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

The new module has been conceived for size-demanding designs that proved demanding for previous modules, although still delivering 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 potentially host larger antennas, improving RF performance or accommodating larger-size batteries.

Another prominent feature of the module is its 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 extremely convenient in countries where LTE-M/NB-IoT networks have yet to be fully deployed.

Natively designed to support GNSS AT commands, the u-blox LEXI-R4 is also ready for GNSS bundling. Its dedicated port enables easy integration with any u-blox M10-based GNSS module, such as the u-blox MIA-M10, offering better performance and low power consumption. Moreover, the module can also connect to further positioning services such as AssistNow and CellLocate. 

“The u-blox LEXI-R4 is an ideal solution for size-constrained applications. Since the module supports the u-blox M10 GNSS platform, customers save execution time and resources. This is because the AT commands and a dedicated I2C port can operate the GNSS core, thus eliminating the need to integrate additional code into the MCU. In addition, the LEXI-R4 module offers a single SKU with global LPWA (low-power wide-area) coverage that simplifies logistics,” says Samuele Falcomer, senior product line manager, Product Center Cellular at u-blox.