I'd like manage my Arduino source code (projects and libraries) under source control with continuous testing. How can I automatically compile the code with continuous integration tools, to make sure each version compiles cleanly? In the best case one should be able to configure builds for multiple processors, optionally run unit tests and check for maximum binary size.

  • Other than passing it through Ino and avr-size? Commented Jan 16, 2015 at 17:01
  • @IgnacioVazquez-Abrams I don't mind which tools to use, but it should run automatically on some cloud hosting or continuous integration service.
    – Jakob
    Commented Jan 16, 2015 at 17:03
  • 1
    Compiling binary size isn't that hard, but to do unit tests, you would have to structure your code in such a way that it is unit-testable, which is hard enough if you want to keep size small. Besides, you will need to run those test on a chip or in an emulator to get a test that is more or less reliable.
    – GolezTrol
    Commented Jan 16, 2015 at 19:46
  • I found github.com/kyab/travis-test-arduino but its experimental and a comprehensive answer/tutorial as answer would be better.
    – Jakob
    Commented Jan 18, 2015 at 16:58
  • 3
    The issue with this is it goes against the original purpose of continuous integration: it's meant to push changes and then have it automatically build and deploy within minutes. This allows your customers to get the latest features and fixes as they happen, instead of every two months. For Arduino it's just "cloud making sure it builds." For unit tests you might have to bypass the Arduino libraries to build functions and send example data over the "pins." Commented Jan 18, 2015 at 17:13

6 Answers 6


Newest version of Arduino ide has a command line interface to build and upload code. But you can obviously do it by makefile and avrdude. Now, you have compiled your code BUT you need testing. As simulator are complex,incomplete, expansive and.. Just a simulation, and because the chip are relatively cheap, building a board witch will make HW interaction AND check the results its the fastest and easiest way. On that "special" board you may upload something like an interpreter witch take a test from the PC and execute it, something similar to firmata for arduino. At least that is how I would build it. And as far as I know there are no know implementation of this, even if I'm quite sure many industries should and probably do that.


As the creator of PlatformIO I would recommend you to look into it. It's a cross-platform code builder and missing library manager. It can build the same code for the many popular embedded development platforms and boards.

PlatformIO can be be integrated with many popular Continuous Integration (CI) systems (or your own). See documentation with examples.

Let's look into .travis.yml config/template for Travis CI:

language: python
    - "2.7"

    - PLATFORMIO_CI_SRC=path/to/source/file.c
    - PLATFORMIO_CI_SRC=path/to/source/file.ino
    - PLATFORMIO_CI_SRC=path/to/source/directory

    - python -c "$(curl -fsSL https://raw.githubusercontent.com/platformio/platformio/master/scripts/get-platformio.py)"

    - platformio ci --board=TYPE_1 --board=TYPE_2 --board=TYPE_N


Integration for USB_Host_Shield_2.0 project. The .travis.yml configuration file:

language: python
    - "2.7"

    - PLATFORMIO_CI_SRC=examples/acm/acm_terminal
    - PLATFORMIO_CI_SRC=examples/ftdi/USBFTDILoopback
    # - ...

    - python -c "$(curl -fsSL https://raw.githubusercontent.com/platformio/platformio/master/scripts/get-platformio.py)"

    # Libraries from PlatformIO Library Registry
    # http://platformio.org/#!/lib/show/416/TinyGPS
    # http://platformio.org/#!/lib/show/417/SPI4Teensy3
    - platformio lib install 416 417

    - platformio ci --board=uno --board=teensy31 --board=due --lib="."
  • 4
    If you are affiliated or associated with PlatformIO you should disclose this in your answer, or it may be flagged and removed as spam. Thanks!
    – Nick Gammon
    Commented Jan 28, 2019 at 23:43

One example of setting up Jenkins continuous integration for Arduino project can be found here: Continuous integration for embedded systems

The example shows how to build and upload image to Arduino and execute Selenium web tests (the system under test is Arduino-based web-server).

  • nice because it use some existing software witch is feature rich. but it seems to do only web testing; can you please expand the answer? also link-based answer are bad.
    – Lesto
    Commented Mar 3, 2015 at 15:59

I wrote this test unittest framework for Arduino, since i could not find proper existing. While i did not write it for CI, it would be good fit for CI job, since it requires no hardware but can be ran on PC.

Running the CI jobs without the hardware has good sides and bad sides, good sides beeing that

  • No flashing, no hardware needed -> can be runned in parallel -> fast to check for example for every commit
  • No hardware issues influencing the tests -> no need to worry did this test just fail because my XYZ-hardware component is not stable

On the downside there is:

  • Its not testing the actual target code, for example your 'int' is 32 bits in your PC and 16bits in AVR.
  • your 'int' is 64 bits in your PC”: you probably mean “32 bits”, or you are using some exotic OS. Commented May 15, 2017 at 8:21
  • You are right of course, thanks. I edited my answer to fix that.
    – susundberg
    Commented May 15, 2017 at 12:08
  • note you can set up an in-home CI server with a cheap pc like a raspberry hooked up to an HW board and thus have a piece of the CI infrastructure running on real HW (while maybe keeping the default cloud CI for all that is software)
    – Lesto
    Commented Oct 25, 2019 at 22:34

I've just put together a decent size writeup as an answer to this related question about an Arduino CI/unit testing framework I wrote that's finally mature enough to start talking publicly about.

The arduino_ci ruby gem supports both local testing and Travis CI integration (e.g. this build job for the Adafruit FONA library).

Some examples of how it integrates:

I have an issue created for reporting sketch size but no work has been done on that. It's also possible that I could parallelize the builds someday, but at the moment I'm not precisely sure how I'd do that. Right now, the most time consuming build step on Travis CI is downloading the Arduino IDE... parallel testing won't put much of a dent in that if every job needs to do that step.


I would advice to use the arduino eclipse plugin named sloeber sloeber.io of which I'm the project lead.
It integrates with version control and allows building on multiple platforms as it supports multiple configurations.
Though it is not yet idiot proof I have documented and demonstrated using unit testing of arduino code on the local pc using the google test framework.
Here is a link to a blog containing a presentation of how you can do it. http://blog.baeyens.it/#post25

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