*: relicense to LGPL3
The ESP32 SDK embeds non-Free blobs for WiFi and Bluetooth support.
This means we can't ship the firmware as a GPL2/3 artifact unless we attempt to argue that these make part of what the GPL calls System Libraries.
The closest license we can use here is LGPL3.0, and we'll comply with its terms by simply shipping/offering full sources to the firmware (ie. this Git repository) with every binary release. This satisfies the relinking requirement.
As far as I know, we use no other GPL licensed code.
For a relicense, we need yet another round of approvals from:
Simply state something along the lines of 'I approve for my existing contributions to this repository to be distributed under the terms of the GNU LGPL 3.0 license.'.
Edited by ch3