It's an abandoned proof of concept.
A bluetooth <-> MQTT gateway written in Common Lisp.
It's written in a way that it can be compiled by ECL and it can run on a small OpenWRT router, or other tiny devices.
It was part of a project that I was involved in at around 2015, but the project was discontinued.
The reason I'm publishing it is that it serves as an example for hu.dwim.bluez.
Written by attila@lendvai.name.