I'm happy to announce hArduino: a library that allows Arduino boards to be controlled directly from Haskell. hArduino uses the Firmata protocol (http://firmata.org), to communicate with and control Arduino boards, making it possible to implement many controller projects directly in Haskell.

Home page: http://leventerkok.github.com/hArduino/

Hackage: http://hackage.haskell.org/package/hArduino

Some example programs:

Blink the led: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-Blink.html

Digital counter: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-Counter.html

Control an LCD: http://hackage.haskell.org/packages/archive/hArduino/latest/doc/html/System-Hardware-Arduino-SamplePrograms-LCD.html

Short (4.5 mins) youtube video of the blink example: http://www.youtube.com/watch?v=PPa3im44t2g

hArduino is work-in-progress: Patches, bug-reports, and feedback is most welcome.

-Levent.