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Helper for verifying a board definition works as expected
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Board test suite for CircuitPython. Run these tests to ensure that a CircuitPython port was created correctly, individual pin mappings are correct, and buses (e.g. SPI) work.

Tests can be run individually. Copy code found in each boardtest_<name>.py module to your CIRCUITPYTHON device drive, and rename the file

Alternatively, tests can be imported as modules. Copy the desired test file to CIRCUITPYTHON device drive and import the test in your own code. Each test can be run with the run_test(pins) function.

The (in examples/) shows how to call tests from within a script. runs the following tests:

  • LED Test
  • GPIO Test
  • Voltage Monitor Test
  • UART Test
  • SPI Test
  • I2C Test


This test suite depends on:

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Usage Example

You will need the following components:

Connect the components as shown to your board. Note that you can use a 220 Ohm or 330 Ohm resistor for the LED.

Test jig Fritzing diagram

To use each test, copy the individual .py or .mpy test(s) into a folder named adafruit_boardtest in the CIRCUITPY drive, import the library, find the pins available on your board, and call boardtest_<test name>.run_test(pins). To run the GPIO test, for example:

import board
from adafruit_boardtest import boardtest_gpio

# List out all the pins available to us
pins = [p for p in dir(board)]
print("All pins found:", end=' ')

# Print pins
for p in pins:
    print(p, end=' ')

# Run test
result = run_test(pins)
print("Pins tested: " + str(result[1]))


Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

Building locally

Zip release files

To build this library locally you'll need to install the circuitpython-build-tools package.

python3 -m venv .env
source .env/bin/activate
pip install circuitpython-build-tools

Once installed, make sure you are in the virtual environment:

source .env/bin/activate

Then run the build:

circuitpython-build-bundles --filename_prefix adafruit-circuitpython-boardtest --library_location .

Sphinx documentation

Sphinx is used to build the documentation based on rST files and comments in the code. First, install dependencies (feel free to reuse the virtual environment from above):

python3 -m venv .env
source .env/bin/activate
pip install Sphinx sphinx-rtd-theme

Now, once you have the virtual environment activated:

cd docs
sphinx-build -E -W -b html . _build/html

This will output the documentation to docs/_build/html. Open the index.html in your browser to view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to locally verify it will pass.

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