STMicroelectronics B-L072Z-LRWAN1 and I-NUCLEO-LRWAN1 prototype boards

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Two ready-to-use prototype boards from STMicroelectronics will enable developers to better evaluate LoRaWAN and other low-power wide area network (LPWAN) technologies, including 6LoWPAN. The boards are based on the smallest and lowest-power LoRaWAN modules that exist on the market today, with a footprint not larger than 13 x 12 mm and power consumption in the range of 1.2 µA in standby mode.

The B-L072Z-LRWAN1 STM32 LoRa Discovery kit builds on the all-in-one open module from Murata that integrates a STM32L072CZ MCU and Semtech SX1276 transceivers. The module features a LoRa modem that provides ultralong-range spread-spectrum communication and high interference immunity while minimising current consumption.

Since the module is open, developers have access to the STM32L072 MCU and its peripherals such as ADC, 16-bit timer, LP-UART, I²C, SPI and USB 2.0 FS (supporting BCD and LPM). They can design their applications using STM32L0 HAL and LL embedded software libraries and can further extend the board’s functionality choosing from expansion boards within the STM32 Nucleo ecosystem or the large range of Arduino expansion boards.

The kit includes an onboard debugger, a 64-pin STM32 Nucleo morpho connector, an Arduino-compatible connector and a battery socket. It also comes with access to a development ecosystem that includes the MDK-ARM Integrated Development Environment (IDE), STM32CubeMX configurator and software tools, and ST’s LoRaWAN protocol stack (I-CUBE-LRWAN).

The I-NUCLEO-LRWAN1 is an expansion board for STM32 Nucleo or Arduino boards that can be simply plugged in to quickly start work developing a full LoRa-based and/or FSK/OOK (Frequency-Shift Keying/On-Off Keying) connectivity applications. The board features a LoRaWAN module from USI together with an STM32L052T8 MCU and Semtech SX1272 transceivers.

The USI module comes preloaded with an AT command stack that helps streamline development and saves programming. To aid development of IoT applications, the board is also equipped with ST’s LIS2DS12 3-axis accelerometer, LPS22HB MEMS pressure sensor and HTS221 humidity-and-temperature sensor.

Both boards are LoRaWAN-certified and compliant with wireless regulations in the US, EU, Russia, India and other countries using the 860–930 MHz frequency bands. In addition to the industry-standard protocols, they also support LPWAN protocols for long-range connection of IoT devices like smart meters, alarm systems, tracking devices, positioning devices, environmental sensors and activity sensors.

For more information: www.st.com/stm32-lrwan.