The Raspberry Pi Build HAT is an add-on board that connects to the 40-pin GPIO header of your Raspberry Pi. Designed in collaboration with LEGO® Education, it makes it easy to control LEGO® Technic™ motors and sensors — like those found in the LEGO® Education SPIKE™ Prime set — directly from your Raspberry Pi (using Python, for example).

Today we’re delighted to announce that the Build HAT firmware, together with its signing keys, is now open source and available under the permissive BSD 3-Clause licence.

...read more at raspberrypi.com