STMicroelectronics I-NUCLEO-LRWAN1

Overview

I-NUCLEO-LRWAN1 from STMicroelectronics is a LoRa®/FSK/OOK expansion board for STM32 Nucleo platforms, integrating USI®'s certified LoRaWAN™ module (based on STM32L052T8Y6 MCU and Semtech SX1272 transceiver), LSM303AGR accelerometer/magnetometer, HTS221 humidity/temperature sensor, and LPS22HB pressure sensor - enabling rapid prototyping of Class A/C LoRaWAN™ end-nodes in sub-GHz ISM bands (860–1020 MHz).

For engineers reviewing the I-NUCLEO-LRWAN1 datasheet, I-NUCLEO-LRWAN1 pinout, I-NUCLEO-LRWAN1 application, or I-NUCLEO-LRWAN1 equivalent, this board delivers pre-certified LoRaWAN™ stack support via AT commands, Arduino™-compatible headers, SMA antenna interface, and seamless integration with STM32Cube middleware (UM2073) and I-CUBE-LRWAN firmware.

Technical Context

The board implements a dual-processor architecture: the onboard STM32L052T8Y6 (Cortex-M0+, 64 KB Flash, 8 KB RAM, 2 KB EEPROM) hosts the AT-command firmware and manages sensor data acquisition, while the SX1272 handles RF modulation (LoRa®, FSK, GFSK, MSK, GMSK, OOK), achieving -137 dBm sensitivity and 14–20 dBm output power across 2.0–3.6 V supply.

It supports LoRaWAN™ Class A operation with optional Class C capability, uses embedded 32 kHz and 32 MHz crystals for precise timing, and communicates with host Nucleo boards (e.g., NUCLEO-L053R8) via USART over Arduino™-pin-mapped headers - all coordinated through ST's I-CUBE-LRWAN software stack.

Key Specifications

Availability

I-NUCLEO-LRWAN1 is available at Aetrix Electronics and suitable for LPWAN node development, IoT sensor gateway validation, and LoRaWAN™ Class A/C end-device certification requiring stable component supply and traceable sourcing.

Supply support for I-NUCLEO-LRWAN1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader specializing in microcontrollers, sensors, power management, and wireless solutions for industrial, automotive, and IoT applications.

This board belongs to ST's Nucleo ecosystem expansion series, designed to accelerate LoRaWAN™-based IoT prototyping by integrating certified radio modules, environmental sensing, and standardized Arduino™/ST morpho interfaces.

FAQ

Is I-NUCLEO-LRWAN1 a standalone microcontroller board?

No. It is an expansion board requiring connection to a compatible STM32 Nucleo host board (e.g., NUCLEO-L053R8) via Arduino™ headers. The onboard STM32L052T8Y6 runs only the LoRaWAN™ AT-command firmware and does not serve as the primary application processor.

Does I-NUCLEO-LRWAN1 include LoRaWAN™ certification?

Yes. It is officially LoRaWAN™ Class A certified and supports Class C operation. Certification applies to the complete board-level implementation including USI®'s module, antenna matching network, and firmware stack - verified per LoRa Alliance test procedures.

What software is required to use this board?

The I-CUBE-LRWAN firmware package and STM32CubeMX configuration tool are mandatory. The board relies on ST's LoRa® Middleware library (documented in UM2073) and requires host-side serial AT command parsing - no custom RF driver development is needed for basic node operation.

Can the onboard sensors be used independently of LoRaWAN™?

Yes. All three sensors (LSM303AGR, HTS221, LPS22HB) are accessible via I²C through dedicated pins on the Arduino™ headers. Their drivers are included in the I-CUBE-LRWAN software, allowing raw sensor data collection and local processing without RF transmission.