Licence: CC BY-NC-SA 4.0 (GRBL firmware stays GPLv3)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

software/README.md

@@ -159,7 +159,7 @@ All other defaults (steps, accelerations, homing speeds) are in `sandtable/confi
 | `cli.py` | Commands |
 
 ## Firmware
-`firmware/grbl_v1.1h.20190825.hex` is the official GRBL 1.1h build from [gnea/grbl](https://github.com/gnea/grbl/releases/tag/v1.1h.20190825) (GPLv3), unchanged:
+`firmware/grbl_v1.1h.20190825.hex` is the official GRBL 1.1h build from [gnea/grbl](https://github.com/gnea/grbl/releases/tag/v1.1h.20190825), unchanged. It's under the GPL v3 (`firmware/COPYING-GRBL`); the rest of this repository is CC BY-NC-SA 4.0. The file is:
 - SHA-256 `1198b332…673165d`;
 - 29,920 bytes, which fits an Uno with its bootloader;
 - includes the switch-state field (`Pn:`) that the homing uses.