LoRa STM32WL DevKit
Overview
LoRaWAN development kit based on Olimex BB-STM32WL module using the STM32WLE5CCU6 MCU.
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
BME280 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 olimex_lora_stm32wl_devkit board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M4 CPU1 |
|
ADC |
on-chip |
STM32 ADC1 |
|
Clock control |
on-chip |
STM32WL RCC (Reset and Clock controller)1 |
|
on-chip |
STM32WL HSE Clock1 |
||
on-chip |
Generic fixed-rate clock provider2 |
||
on-chip |
STM32 MSI Clock1 |
||
on-chip |
STM32 LSE Clock1 |
||
on-chip |
STM32WB and STM32WL PLL node1 |
||
on-chip |
STM32 Microcontroller Clock Output (MCO)1 |
||
Counter |
on-chip |
STM32 counters3 |
|
Cryptographic accelerator |
on-chip |
STM32 AES Accelerator1 |
|
DAC |
on-chip |
STM32 family DAC1 |
|
DMA |
on-chip |
STM32 DMA controller (V2)2 |
|
on-chip |
STM32 DMAMUX controller1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
GPIO & Headers |
on-chip |
STM32 GPIO Controller4 |
|
I2C |
on-chip |
||
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
LoRa |
on-chip |
STM32WL Sub-GHz Radio1 |
|
Memory controller |
on-chip |
STM32 Battery Backed RAM1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
STM32 Pin controller1 |
|
Power management |
on-chip |
STM32 power controller1 |
|
PWM |
on-chip |
STM32 PWM4 |
|
Regulator |
on-board |
Fixed voltage regulators1 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
Sensors |
on-board |
BME280 integrated environmental sensor1 |
|
on-board |
STMicroelectronics IIS2MDC magnetometer accessed through I2C bus1 |
||
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
||
on-chip |
STM32 VREF+1 |
||
on-chip |
STM32 VBAT1 |
||
Serial controller |
on-chip |
||
on-chip |
STM32 LPUART1 |
||
SMbus |
on-chip |
STM32 SMBus controller3 |
|
SPI |
on-chip |
||
on-chip |
STM32 SUBGHZ SPI controller1 |
||
SRAM |
on-chip |
Generic on-chip SRAM1 |
|
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
STM32 low-power timer (LPTIM)1 |
||
on-chip |
STM32 timers4 |
||
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
Programming and Debugging
The olimex_lora_stm32wl_devkit board supports the runners and associated west commands listed below.
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
If you’re using devkit revision C or higher, you’ll need to specify the appropriate revision letter to enable the VDDIO supply to the UEXT1 connector and CON1 pin header.
# From the root of the zephyr repository
west build -b olimex_lora_stm32wl_devkit@D samples/hello_world
west flash
Run a serial terminal to connect with your board. By default, usart1 is
accessible via 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
On board revisions C or newer:
# From the root of the zephyr repository
west build -b olimex_lora_stm32wl_devkit@D samples/basic/blinky
west debug