Amos King and I have been working on an Elixir library for using the GrovePi+ and most of the sensors in the base kit. It runs on both Raspbian and Nerves. A configuration option allows simulation of simple hardware interactions so that you can develop and test on a laptop. Documentation and source code are at https://hex.pm/packages/grovepi.
This is neat! I’m not that familiar with Elixir nor Nerves but it’s super sharp to have support for it!