I’ve recently found a couple of projects that make me think that it might be relatively easy to port uLisp to the Raspberry Pi. At £4.80 in the UK for a platform with a 1 GHz processor and 512 MB of RAM, the Raspberry Pi Zero is an attractive option.
Although you can run an open source version of Common Lisp under Linux (Raspbian) on the Raspberry Pi, uLisp would offer some advantages, such as immediate access to the same standard range of Arduino extensions for interfacing to the outside world.
Piduino Library (libpiduino) is a C++ library by Jorge Garza that lets you write and compile Arduino programs in the Raspberry Pi.
RasPiArduino is an Arduino framework for the Raspberry Pi by GitHub user Me No Dev.
I’d be interested in feedback from anyone with experience of the Raspberry Pi about the feasibility of either of these starting points.