On an old RbP install Rasbian (which is their default Linux) and get Mathematica for free.

Mathematica, aside form being generally awesome, has native support for querying different blockchains, and you can use Wolfram Language to build almost anything.

Nevermind that an old RbP runs a bitcoin node just fine. Some folks on this thread seem to think running a bitcoin node requires a "real" computer. That's nonsense. That's just inexperience, talking.