In 1v91 and later you can do this:
"Puck.js "+NRF.getAddress().substr(-5).replace(":","")
But I'm afraid there's no way to get the current address directly
@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.
In 1v91 and later you can do this:
But I'm afraid there's no way to get the current address directly