License incompatibility

[afaerber]

The README.md says: The original Radiohead library is under GPLv2 license. and Modifications and examples come from Snootlab with GPLv2 license.
lib/radiohead/LICENSE indeed says GPL V2 and does not include any "or (at your option) any later version" clause. The individual source files don't include any license header.

As already pointed out in Snootlab/lmic_chisterapi#2 though, wiringPi is under LGPL-3.0+ license, which is incompatible with GPL-2.0. The main Makefile links against it, making the resulting chisterapi binary a combined work that is not legally redistributable.

Either RadioHead needs to be relicensed as GPL-2.0+ or your examples need to be modified to not use wiringPi.

[afaerber]

Asked about LICENSE file on the RadioHead mailing list:
https://groups.google.com/forum/#!topic/radiohead-arduino/UY9HkTnPyG4