Platform ST STM8: The STM8 is an 8-bit microcontroller family by STMicroelectronics an extended variant of the ST7 microcontroller architecture. STM8 microcontrollers are particularly low cost for a full-featured 8-bit microcontroller.

Microcontroller STM8S105C6T6
Frequency 16MHz
Flash 32KB
Vendor ST


Please use stm8sdisco ID for board option in “platformio.ini” (Project Configuration File):

platform = ststm8
board = stm8sdisco

You can override default ST STM8S-DISCOVERY settings per build environment using board_*** option, where *** is a JSON object path from board manifest stm8sdisco.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = ststm8
board = stm8sdisco

; change microcontroller
board_build.mcu = stm8s105c6t6

; change MCU frequency
board_build.f_cpu = 16000000L


ST STM8S-DISCOVERY supports the next uploading protocols:

  • serial
  • stlink
  • stlinkv2

Default protocol is stlink

You can change upload protocol using upload_protocol option:

platform = ststm8
board = stm8sdisco

upload_protocol = stlink


PIO Unified Debugger - “1-click” solution for debugging with a zero configuration.


You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

ST STM8S-DISCOVERY has on-board debug probe and IS READY for debugging. You don’t need to use/buy external debug probe.

Compatible Tools On-board Default


Name Description
Arduino Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences.
SPL The ST Standard Peripheral Library provides a set of functions for handling the peripherals on the STM32 Cortex-M3 family. The idea is to save the user (the new user, in particular) having to deal directly with the registers.