Environment Variables

Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer. PlatformIO handles variables which start with PLATFORMIO_ prefix.

How to set environment variable?

# Windows
set VARIABLE_NAME=VALUE

# Windows GUI -> https://www.youtube.com/watch?v=bEroNNzqlF4

# Unix (bash, zsh)
export VARIABLE_NAME=VALUE

# Unix (fish)
set -x VARIABLE_NAME VALUE

General

PlatformIO uses General environment variables for the common operations/commands.

CI

PlatformIO handles CI variable which is setup by Continuous Integration (Travis, Circle and etc.) systems. PlatformIO uses it to disable prompts and progress bars. In other words, CI=true automatically setup PLATFORMIO_DISABLE_PROGRESSBAR to true.

PLATFORMIO_AUTH_TOKEN

Allows one to specify Personal Authentication Token that could be used for automatic login in to PlatformIO Account. It is very useful for Continuous Integration systems and Remote Development operations where you are not able manually authorize.

You can get own Personal Authentication Token using pio account token command.

PLATFORMIO_FORCE_ANSI

Force to output ANSI control character even if the output is a pipe (not a tty). The possible values are true and false. Default is PLATFORMIO_FORCE_ANSI=false.

PLATFORMIO_NO_ANSI

Do not print ANSI control characters. The possible values are true and false. Default is PLATFORMIO_NO_ANSI=false.

You can also use pio --no-ansi flag for PlatformIO Core (CLI).

PLATFORMIO_DISABLE_PROGRESSBAR

Disable progress bar for package/library downloader and uploader. This is useful when calling PlatformIO from subprocess and output is a pipe (not a tty). The possible values are true and false. Default is PLATFORMIO_DISABLE_PROGRESSBAR=false.

PLATFORMIO_SYSTEM_TYPE

This environment variable allows you to manually specify the system type, overriding the automatic detection. Examples:

• windows_amd64

• windows_arm64

• linux_x86_64

• linux_armv7l

• darwin_arm64

Directories

PLATFORMIO_CORE_DIR

Allows one to override “platformio.ini” (Project Configuration File) option core_dir.

It may need to re-install PlatformIO Core (CLI) (remove default core directory) to take effect.

PLATFORMIO_GLOBALLIB_DIR

Allows one to override “platformio.ini” (Project Configuration File) option globallib_dir.

PLATFORMIO_PLATFORMS_DIR

Allows one to override “platformio.ini” (Project Configuration File) option platforms_dir.

PLATFORMIO_PACKAGES_DIR

Allows one to override “platformio.ini” (Project Configuration File) option packages_dir.

PLATFORMIO_CACHE_DIR

Allows one to override “platformio.ini” (Project Configuration File) option cache_dir.

PLATFORMIO_BUILD_CACHE_DIR

Allows one to override “platformio.ini” (Project Configuration File) option build_cache_dir.

PLATFORMIO_WORKSPACE_DIR

Allows one to override “platformio.ini” (Project Configuration File) option workspace_dir.

PLATFORMIO_INCLUDE_DIR

Allows one to override “platformio.ini” (Project Configuration File) option include_dir.

PLATFORMIO_SRC_DIR

Allows one to override “platformio.ini” (Project Configuration File) option src_dir.

PLATFORMIO_LIB_DIR

Allows one to override “platformio.ini” (Project Configuration File) option lib_dir.

PLATFORMIO_LIBDEPS_DIR

Allows one to override “platformio.ini” (Project Configuration File) option libdeps_dir.

PLATFORMIO_BUILD_DIR

Allows one to override “platformio.ini” (Project Configuration File) option build_dir.

PLATFORMIO_DATA_DIR

Allows one to override “platformio.ini” (Project Configuration File) option data_dir.

PLATFORMIO_TEST_DIR

Allows one to override “platformio.ini” (Project Configuration File) option test_dir.

PLATFORMIO_BOARDS_DIR

Allows one to override “platformio.ini” (Project Configuration File) option boards_dir.

PLATFORMIO_MONITOR_DIR

Allows one to override “platformio.ini” (Project Configuration File) option monitor_dir.

PLATFORMIO_SHARED_DIR

Allows one to override “platformio.ini” (Project Configuration File) option shared_dir.

PLATFORMIO_REMOTE_AGENT_DIR

Allows one to override pio remote agent start --working-dir.

Building

PLATFORMIO_BUILD_FLAGS

Allows one to set “platformio.ini” (Project Configuration File) option build_flags.

Examples:

# Unix:
export PLATFORMIO_BUILD_FLAGS=-DFOO
export PLATFORMIO_BUILD_FLAGS=-DFOO -DBAR=1 -Wall

# Windows:
SET PLATFORMIO_BUILD_FLAGS=-DFOO
SET PLATFORMIO_BUILD_FLAGS=-DFOO -DBAR=1 -Wall

Warning

Consider using Interpolation of Values instead of PLATFORMIO_BUILD_FLAGS environment variable if additional build flags contain preprocessor directive with special characters ($, &, ~, etc) in its value.

PLATFORMIO_BUILD_SRC_FLAGS

Allows one to set “platformio.ini” (Project Configuration File) option build_src_flags.

PLATFORMIO_BUILD_SRC_FILTER

Allows one to set “platformio.ini” (Project Configuration File) option build_src_filter.

PLATFORMIO_EXTRA_SCRIPTS

Allows one to set “platformio.ini” (Project Configuration File) option extra_scripts.

PLATFORMIO_DEFAULT_ENVS

Allows one to set “platformio.ini” (Project Configuration File) option default_envs.

Uploading

PLATFORMIO_UPLOAD_PORT

Allows one to set “platformio.ini” (Project Configuration File) option upload_port.

PLATFORMIO_UPLOAD_FLAGS

Allows one to set “platformio.ini” (Project Configuration File) option upload_flags.

Settings

Allows one to override PlatformIO settings. You can manage them via pio settings command.

PLATFORMIO_SETTING_CHECK_PLATFORMIO_INTERVAL

Allows one to override setting check_platformio_interval.

PLATFORMIO_SETTING_CHECK_PRUNE_SYSTEM_THRESHOLD

Allows one to override setting check_prune_system_threshold.

PLATFORMIO_SETTING_ENABLE_CACHE

Allows one to override setting enable_cache.

PLATFORMIO_SETTING_ENABLE_TELEMETRY

Allows one to override setting enable_telemetry.

PLATFORMIO_SETTING_FORCE_VERBOSE

Allows one to override setting force_verbose.

PLATFORMIO_SETTING_PROJECTS_DIR

Allows one to override setting projects_dir.

PLATFORMIO_SETTING_ENABLE_PROXY_STRICT_SSL

Allows one to override setting enable_proxy_strict_ssl.