ArduinoCore-stm32wb is targeted at ultra low power scenarios, sensor hubs, with BLE connectivity.

• Firefly-STM32WB55CG
• Katydid-STM32WB55CG

• NUCLEO-WB55RG

You can use this Arduino core in PlatformIO.

To do so, create any new project in the PIO Home screen (e.g., "Board: Arduino Uno" + "Framework: Arduino"), then overwrite the platformio.ini of the generated project with:

[env:nucleo_wb55rg]
; use forked platform
platform = https://github.com/maxgerhardt/platform-ststm32.git#stm32wb
board = grumpyoldpizza_nucleo_wb55rg
framework = arduino
build_flags = 
    -DPIO_FRAMEWORK_ARDUINO_STORAGE_TYPE_NONE
; if you need to source the core from a different repo
;platform_packages = framework-arduinoststm32wb@https://github.com/maxgerhardt/ArduinoCore-stm32wb.git
; if you need to source the core from the local filesystem
;platform_packages = framework-arduinoststm32wb@symlink://C:\Users\User\Desktop\dev\ArduinoCore-stm32wb

Also see example at https://github.com/maxgerhardt/pio-grumpyoldpizza-stm32wb-test.

Available board selection values:

• grumpyoldpizza_firefly_wb55cg
• grumpyoldpizza_katydid_wb55cg
• grumpyoldpizza_mothra_wb5mmg
• grumpyoldpizza_nucleo_wb55rg
• grumpyoldpizza_snoopy6_wb5mmg

CPU frequency selection example:

; 16 MHz (No USB)
board_build.f_cpu = 16000000L

The default USB type is "Serial" if the board supports USB (currently all except Nucleo WB55RG). This can be changed by activating one of these macros through the build_flags of the platformoi.ini. Remember that to combine multiple flags into one build_flags expression if you want to activate multiple flags.

; USB: "Serial" (default if USB available)
build_flags = -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
; USB: "Serial + Mass Storage"
build_flags = -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC_WITH_MSC
; USB: "No USB"
build_flags = -D PIO_FRAMEWORK_ARDUINO_NO_USB

Configuration for "External Storage":

; Ext. Storage: None (default)
build_flags = -D PIO_FRAMEWORK_ARDUINO_STORAGE_TYPE_NONE
; Ext. Storage: SFLASH
build_flags = -D PIO_FRAMEWORK_ARDUINO_STORAGE_TYPE_SFLASH
; Ext. Storage: SDCARD
build_flags = -D PIO_FRAMEWORK_ARDUINO_STORAGE_TYPE_SDCARD

Example for combined values:

build_flags = 
   -D PIO_FRAMEWORK_ARDUINO_STORAGE_TYPE_SDCARD
   -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC_WITH_MSC

In case of platform or package updates, use

pio pkg update -g -p "https://github.com/maxgerhardt/platform-ststm32.git#stm32wb"
pio pkg update -g -t "https://github.com/maxgerhardt/ArduinoCore-stm32wb.git"

on the CLI.

1. Download and install the Arduino IDE (at least version v1.8.13)
2. Start the Arduino IDE
3. Go into Preferences
4. Add https://grumpyoldpizza.github.io/ArduinoCore-stm32wb/package_stm32wb_boards_index.json as an "Additional Board Manager URL"
5. Open the Boards Manager from the Tools -> Board menu and install "Tlera Corp STM32WB Boards"
6. Select your STM32WB board from the Tools -> Board menu

1. Go to ~/.arduino15/packages/TleraCorp/hardware/stm32wb/<VERSION>/drivers/linux/
2. sudo cp *.rules /etc/udev/rules.d
3. reboot

1. Plugin STM32WB board and toggle the RESET button while holding down the BOOT button
2. Go to %AppData% and navigate from to AppData\Local\Arduino15\packages\TleraCorp\hardware\stm32wb\<VERSION>\drivers\windows
3. Right-click on STM32Bootloader.bat and select Run as administrator

1. Plugin NUCLEO board
2. Download and install ST-Link USB Drivers

1. Follow steps from Board Manager section above
2. cd <SKETCHBOOK>, where <SKETCHBOOK> is your Arduino Sketch folder:

• OS X: ~/Documents/Arduino
• Linux: ~/Arduino
• Windows: Documents\Arduino

3. Create a folder named hardware, if it does not exist, and change directories to it
4. Clone this repo: git clone https://github.com/grumpyoldpizza/ArduinoCore-stm32wb.git TleraCorp/stm32wb
5. Restart the Arduino IDE

STM32WB uses encrypted/signed firmware images for the BLE stack. Please flash the FWUpdate sketch under the STM32WB examples before using BLE. The update will take up few seconds/minutes. During that time the LED will stay on, while the serial monitor will say disconnected. When done the LED will blink if the update was succesful, or simply be turned off if an error was encountered. The serial monitor should pop up again and report back the newly updated firmware versions. The FWInfo sketch can be used to verify what version is installed. At this time it should report back 1.10.0 for the BLE stack.

Sometimes a faulty sketch can render the normal USB Serial based integration into the Arduindo IDE not working. In this case plugin the STM32WB board and toggle the RESET button while holding down the BOOT button and program a known to be working sketch to go ack to a working USB Serial setup.

This core is based on the Arduino SAMD Core