> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prescaler.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# PlatformIO environments

> Select one native environment for a predictable build and upload.

Open the directory containing `platformio.ini`. Build Setup lists declared environments. Select one explicitly when the project has multiple choices. A single project default can be used without an override.

The selected environment scopes native commands such as `pio run --environment <environment>`. The native configuration continues to own the platform, board, framework, libraries and flags. Prescaler does not guess board identity from the first section.

If the project uses inheritance, extra configuration files or interpolated values, inspect the effective configuration using PlatformIO tools. An unresolved UI board label is preferable to a falsely verified target.

Use the native SDK environment when diagnosing upload/debug support. Check that the upload/debug protocol and selected probe are compatible with the environment's board.

[PlatformIO environment configuration](https://docs.platformio.org/en/latest/projectconf/sections/env/index.html)