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labgrid

labgrid is an LGPL-2.1-or-later Python library from Pengutronix for controlling embedded boards in automated tests, with remote access, power and boot control, and a pytest plugin.

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Introduction

labgrid is an embedded board control Python library focused on testing, development and general automation. It abstracts the hardware control layer needed for testing embedded systems, automatic software installation and automation during development.

The README stresses that labgrid is not itself a test framework but combines with one, typically pytest via its plugin. Its remote layer uses a coordinator and exporters so boards attached to other hosts can be shared, with drivers for serial consoles, power switching and boot strategies.

In the quality loop labgrid powers hardware-in-the-loop tests in CI.

The source code is at labgrid-project/labgrid on GitHub under the LGPL-2.1-or-later licence, with about 549 stars; the most recent commit was on 11 November 2026.

Features

  1. Board control: Power, serial, boot.
  2. Strategies: Move boards into states.
  3. Remote access: Coordinator and exporters.
  4. pytest plugin: Write tests in pytest.
  5. Resource sharing: Shared lab hardware.
  6. Python API: Scriptable automation.

Pros

  1. Real hardware: Tests the actual board.
  2. Free to use: Open source under the LGPL-2.1-or-later licence, so the core tool costs nothing to use.
  3. Actively maintained: The repository had commits as recent as 11 November 2026.

Cons

  1. Lab setup: Needs physical infrastructure.
  2. Configuration: YAML environments to write.
  3. Small community: Specialist tool.
pip install labgrid
pytest --lg-env env.yaml tests/

Resources:

Pricing

labgrid is free and open source under the LGPL-2.1-or-later licence.

  1. Embedded Linux teams with board farms.

Conclusion

labgrid is a solid foundation for hardware-in-the-loop CI.

Pair it with simulation for faster feedback.

On CheckOps, labgrid is filed under the Integration testing and Release & CI gates stages. Related tools listed here include Renode, Ceedling, cmocka, Unity Test (C), pytest-embedded and Wokwi. A short trial on a real project, with your own code, data and pipeline, is usually the fastest way to choose between them, because fit matters more than feature lists. Facts here come from the official site, documentation and repository, checked on 11 November 2026.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with labgrid side by side.