I'd be a bit iffy about the level shifter too - everything's going 3.3v, and there are plenty of 3.3v Arduino boards.
Maybe:
Just ideas anyway :)
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'd be a bit iffy about the level shifter too - everything's going 3.3v, and there are plenty of 3.3v Arduino boards.
Maybe:
Just ideas anyway :)