This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Olimex LoRa STM32WL DevKit

Overview

LoRaWAN development kit based on Olimex BB-STM32WL module using the STM32WLE5CCU6 MCU.

Olimex LoRa STM32WL DevKit

Fig. 133 Olimex LoRa STM32WL DevKit (credit: OLIMEX)

Hardware

The board has below hardware features:

  • BB-STM32WL, 256KB Flash, 64KB RAM with external antenna

  • Lithium battery connector 3V (does not include battery)

  • UEXT connector for external sensors

  • BMA280 temperature, humidity, pressure sensor

  • LDR resistor for lighting measurement

  • IIS2MDCTR 3-axis magnetometer for smart parking

  • GPIO connector for prototyping

  • Low power design

  • 1 User LED

  • 1 user, 1 boot, and 1 reset push-button

  • 32.768 kHz LSE crystal oscillator

More information about the board and the module can be found here:

Supported Features

The Zephyr Olimex LoRa STM32WL Dev Kit configuration supports the following hardware features:

Interface

Controller

Driver/Component

ADC

on-chip

adc

AES

on-chip

crypto

COUNTER

on-chip

rtc

CLOCK

on-chip

reset and clock control

FLASH

on-chip

flash

GPIO

on-chip

gpio

I2C

on-chip

i2c

MPU

on-chip

arch/arm

NVIC

on-chip

arch/arm

PINMUX

on-chip

pinmux

RADIO

on-chip

LoRa

SPI

on-chip

spi

UART

on-chip

serial port-polling; serial port-interrupt

WATCHDOG

on-chip

independent watchdog

Other hardware features are not yet supported on this Zephyr port.

The default configuration can be found in the defconfig and dts files:

Programming and Debugging

Applications for the olimex_lora_stm32wl_devkit board configuration can be built the usual way (see Building an Application).

The board contains an on-board debug probe which implements the CMSIS-DAP interface.

It can also be debugged and flashed with an external debug probe connected to the SWD pins.

The built-in debug probe works with pyOCD, but requires installing an additional pack to support the STM32WL:

$ pyocd pack --update
$ pyocd pack --install stm32wl

Flashing an application

Connect the board to your host computer and build and flash an application.

# From the root of the zephyr repository
west build -b olimex_lora_stm32wl_devkit samples/hello_world
west flash

Run a serial terminal to connect with your board. By default, usart1 is accessible via the the built-in USB to UART converter.

$ picocom --baud 115200 /dev/ttyACM0

Debugging

You can debug an application in the usual way. Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b olimex_lora_stm32wl_devkit samples/basic/blinky
west debug