STMicroelectronics B-L475E-IOT01A1

Overview

B-L475E-IOT01A1 from STMicroelectronics is a Discovery kit for IoT node featuring an STM32L475VG microcontroller (Arm® Cortex®-M4, 1 MB Flash, 128 KB SRAM), Bluetooth® 4.1 (SPBTLE-RF), 915 MHz Sub-GHz RF (SPSGRF-915), and Wi-Fi® 802.11 b/g/n (ISM43362-M3G-L44), deployed in cloud-connected sensor edge applications.

For engineers reviewing the B-L475E-IOT01A1 datasheet, B-L475E-IOT01A1 pinout, B-L475E-IOT01A1 application, or B-L475E-IOT01A1 equivalent, this kit serves as a validated hardware platform for rapid prototyping of multi-radio IoT endpoints with integrated environmental, motion, and proximity sensing.

Technical Context

The B-L475E-IOT01A1 integrates heterogeneous wireless connectivity-dual-band RF (Bluetooth + 915 MHz Sub-GHz) and Wi-Fi-on a single board, coordinated via the STM32L475VG MCU's dual-core-peripheral architecture and low-power run/stop modes. It supports concurrent sensor fusion using HTS221 (humidity/temp), LSM6DSL (6-axis IMU), LPS22HB (barometer), LIS3MDL (magnetometer), and VL53L0X (Time-of-Flight).

Hardware abstraction is enabled by STM32Cube HAL libraries and Mbed OS compatibility, with on-board ST-LINK/V2-1 providing debug, programming, and virtual COM port functionality over USB OTG FS. Arduino Uno V3 and PMOD expansion headers allow modular peripheral integration without custom PCB design.

Key Specifications

Availability

B-L475E-IOT01A1 is available at Aetrix Electronics and suitable for industrial IoT gateways, smart building sensor nodes, and cloud-connected asset trackers requiring stable component supply, long-term toolchain support, and certified RF module integration.

Supply support for B-L475E-IOT01A1 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, power management, sensors, and automotive ICs, with R&D centers across Europe, Asia, and the Americas.

The B-L475E-IOT01A1 belongs to ST's Discovery kit product line, designed specifically to accelerate evaluation and firmware development for STM32-based IoT edge devices with multi-protocol wireless and multi-modal sensing capabilities.

FAQ

What wireless protocols does the B-L475E-IOT01A1 natively support?

The B-L475E-IOT01A1 supports Bluetooth 4.1 via SPBTLE-RF, 915 MHz Sub-GHz via SPSGRF-915, and Wi-Fi 802.11 b/g/n via ISM43362-M3G-L44-all independently controllable through the STM32L475VG MCU. No external RF front-end or protocol stack licensing is required for basic operation.

Does the kit include preloaded firmware, and what does it demonstrate?

Yes, demonstration firmware is preloaded in the STM32L475VG Flash memory. It showcases concurrent sensor readouts (HTS221, LSM6DSL, LPS22HB, VL53L0X), Bluetooth advertising, Wi-Fi network association, and HTTP POST to cloud endpoints-running in standalone mode without host PC interaction.

Can the B-L475E-IOT01A1 be used for certified end-product designs?

No-the B-L475E-IOT01A1 is an evaluation kit only. Its RF modules carry individual certifications (e.g., FCC ID for ISM43362-M3G-L44), but the assembled board lacks system-level regulatory certification. For production, ST provides reference designs and module-level documentation to support compliance engineering.

Is Mbed OS support provided out-of-the-box?

Yes, the B-L475E-IOT01A1 is Arm® Mbed Enabled™ certified. ST provides Mbed OS BSPs and example applications on st.com/x-cube-cloud, including TLS-secured MQTT clients, sensor fusion middleware, and Over-The-Air (OTA) update handlers compatible with major cloud platforms.