General options


Development Platforms name.

PlatformIO allows to use specific version of platform using Semantic Versioning (X.Y.Z=MAJOR.MINOR.PATCH) or VCS (Git, Mercurial and Subversion).

Version specifications can take any of the following forms:

  • 1.2.3: an exact version number. Use only this exact version
  • ^1.2.3: any compatible version (exact version for 1.x.x versions)
  • ~1.2.3: any version with the same major and minor versions, and an equal or greater patch version
  • >1.2.3: any version greater than 1.2.3. >=, <, and <= are also possible
  • >0.1.0,!=0.2.0,<0.3.0: any version greater than 0.1.0, not equal to 0.2.0 and less than 0.3.0

Other forms are the same as for the platformio platform install command.


platform = atmelavr

platform = [email protected]

platform = [email protected]^1.2.3

platform = [email protected]~1.2.3

platform =

platform =

platform =


Frameworks name.

The multiple frameworks are allowed, split them with comma+space “, “.


PlatformIO has pre-configured settings for the most popular boards. You don’t need to specify board_build.mcu, board_build.f_cpu, upload_protocol or upload_speed options. Just define a board type and PlatformIO will pre-fill options described above with appropriate values.

You can find the board type in Boards section of each Development Platforms or using PlatformIO Embedded Boards Explorer.


A list with targets which will be processed by platformio run command by default. You can enter more than one target, please split them with comma+space “, “.

The list with available targets is located in platformio run --target.

Example: build a project, upload firmware and start Serial Monitor automatically.

targets = upload, monitor

Tip! You can use these targets like an option to platformio run --target command. For example:

# clean project
platformio run -t clean

# dump current build environment
platformio run --target envdump

When no targets are defined, PlatformIO will build only sources by default.