I have been working on other projects, but I do have the design and most of the code ready for a BEN in Python.

However, there are some questions left about how to connect the Pis - the simplest, but least authentic way being to use the MCN (Master Control Node) as the communication point between all nodes.

I've also been toying with Docker, but I think this would make serial comm. complicated.

https://dzone.com/articles/docker-swarm-node-set-up-with-docker-112-rc-on-ras

Link to article.