Called B-L4S5I-IOT01A STM32 Discovery kit, it is built around an STM32L4+ microcontroller and has sensors, a secure element (STSAFE-A110), NFC, Wi-Fi and Bluetooth 4.2.
It needs the free-to-download X-Cube-AWS v2.0 STM32Cube Expansion Pack, which is a set of libraries and application examples for the microcontrollers acting as end devices – and this is where the port of FreeRTOS comes from. The port, according to ST, is qualified on AWS.
The expansion pack (left) offloads, when available, security-critical operations to the secure element during the MCU boot process, during TLS device authentication towards the AWS ‘IoT Core’ server, and during the verification of over-the-air (OTA) update firmware image integrity and authenticity. It uses the secure element provisioned certificate with the AWS ‘IoT Core Multi-Account Registration’ feature.“With the expansion pack, the kit can be used as a reference design,” according to ST. “X-CUBE-AWS v2.0 ensures proper integration of the FreeRTOS standard AWS connectivity framework within the STM32Cube environment. This lets users take advantage of both FreeRTOS and STM32Cube without developing additional software.”
The MCU is an Arm Cortex-M4 STM32L4S5VIT6 with 2Mbyte flash, 640kbyte RAM and a hardware encryption accelerator.
On-board sensors are:
HTS221 capacitive digital relative-humidity and temperature
LIS3MDL 3-axis magnetometer
LSM6DSL 3D accelerometer and 3D gyroscope
LPS22HB absolute barometer
VL53L0X time-of-flight and gesture-detector
Two digital microphones
Source: This news is taken from www.electronicsweekly.com
