That's good - so it should be possible. To be honest 90% of the code in that instructable seems to be handling scanning for services and things - which Espruino handles for you anyway - so doing similar in Espruino should be pretty easy.
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.
That's good - so it should be possible. To be honest 90% of the code in that instructable seems to be handling scanning for services and things - which Espruino handles for you anyway - so doing similar in Espruino should be pretty easy.
I just wish I had one here to try out :)