Use the LGPL 2.1 or later license on all files #234
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Some of the files in the Arduino core were missing the license headers. They contain code which is either copied from previous Arduino cores (which were already LGPL-2.1-or-later), or has been submitted to this repository where most of the code is clearly LGPL-2.1-or-later. In any case, all the contributors have either been directly employed by Arduino or have signed the CLA. Add the missing LGPL-2.1-or-later headers to the files.
The CAN files had a non-standard license which does not match the other files in the repository. This commit updates the license header to match that of the other files. All of the contributors to these files have either been employed by Arduino or have signed the CLA.
Minor updates to the license headers to make them more consistent among the repository.
The files in the test/ folder had a copyright notice, but no license information. This commit adds the LGPL-2.1-or-later SPDX license identifier to all these files.
All files in this repository are licensed under the GNU Lesser General Public License version 2.1. Make this obvious by including the LICENSE file in the root of the repository. In addition to the above clause, some files may also be distributed under additional license terms. See each individual file for details.
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Arduino software has historically always been licensed using the "GNU Lesser General Public License, version 2.1 or later" license formula (aka the
LGPL-2.1-or-laterSPDX identifier).This has always been the intent for the code in the ArduinoCore-API repository as well; however, there are several small issues that make this repository license not clearly defined:
LGPL-2.1-or-laterlicense;testfolder have copyright lines but no licensing information.This PR addresses all these issues and converts all the repository to the
LGPL-2.1-or-laterlicense. Note that the authors of the code whose license has changed either are or were directly employed by Arduino, or had signed a CLA.Note that some files have additional non-conflicting license terms; see each individual file for details.