New STM32 Boards from STMicroelectronics Support Cost-Effective and Ultra-Low-Power LPWAN Evaluation for Long-Range IoT Connectivity

Two new ready-to-use prototype boards available from STMicroelectronics slash the cost for developers to start evaluating 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 13x12mm and power consumption in the range of 1.2µA in standby mode.

The B-L072Z-LRWAN1 STM32 LoRa® Discovery kit ($46.50) builds on the all-in-one open module from Murata® that integrates a STM32L072CZ microcontroller (MCU) and Semtech SX1276 transceivers. The module features a LoRa modem that provides ultra-long-range spread-spectrum communication and high interference immunity whilst minimizing 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 B-L072Z-LRWAN1 kit includes an on-board debugger, a 64-pin STM32 Nucleo morpho connector, an Arduino-compatible connector, and a battery socket. It also comes with access to a completely free 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 ($25.00) 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 pre-loaded with an AT command stack that helps streamline development and saves programming. The I-CUBE-LRWAN stack is available free of charge. As an extra bonus, to aid development of Internet-of-Things (IoT) applications, the I-NUCLEO-LRWAN1 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 fully compliant with wireless regulations in the US, EU, Russia, India, and other countries using the 860-930MHz frequency bands. In addition to the industry-standard protocols, they also support proprietary LPWAN protocols for long-range connection of IoT devices like smart meters, alarm systems, tracking devices, positioning devices, environmental sensors, and activity sensors.

The B-L072Z-LRWAN1 Discovery kit and I-NUCLEO-LRWAN1 are ready for distributors to order now, and will be available via by the end of this month.

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STMicroelectronics Empowers Wireless IoT-Device Developers with New LoRa™ Kit Leveraging STM32 Microcontroller Ecosystem

STMicroelectronics has introduced a low-cost development kit that leverages the STM32 microcontroller ecosystem for prototyping Internet-of-Things (IoT) devices with LoRa™ Wireless Low-Power Wide Area Network (LPWAN) connectivity.

Priced at just $40, the P-NUCLEO-LRWAN1 kit combines the ultra-low-power STM32L073 Nucleo (NUCLEO-L073RZ) microcontroller board with an RF expansion board based on the proven SX1272 LoRa transceiver from Semtech (I-NUCLEO-SX1272D). The STM32L073 MCU, with its energy-efficient ARM® Cortex®-M0+ core and proprietary ultra-low-power features, provides an ideal host for devices such as utility meters, alarm systems, positioning devices, trackers, and remote sensors. Users can further extend functionality by adding extra expansion boards, such as the X-NUCLEO-IKS01A1 sensor board for motion, humidity, and temperature sensing.

LoRa enables long-range communication with several advantages over conventional cellular connections, including lower power and cost. Versatile features include multiple communication modes, accurate indoor and outdoor location awareness, and native AES-128 security.

The new kit contains everything needed to build bi-directional end devices that comply with LoRaWAN™ version 1.0.1 and support class A and class C protocols. Devices can be activated using Over-The-Air Activation (OTAA) or Activation-By-Personalization (ABP). An application for LoRaWAN certification tests is included in the kit, and the I-CUBE-LRWAN LoRaWAN stack is available and posted at

Access to the STM32 ecosystem provides rich development resources, including STM32Cube tools and software packages containing sample code and Hardware Abstraction Layers (HALs). These allow porting to any of the almost 700 STM32 MCU variants that cover a wide range of performance, power, packages, and price points. Developers are also free to use familiar IDEs and ARM mbed™ online tools.

The low purchase price of the P-NUCLEO-LRWAN1 kit allows a wide variety of engineers including independent designers, universities, and hobbyists to enjoy a high-end LoRa development experience. It is available immediately and can be purchased directly from or through distributors.

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