Check out this post: http://forum.espruino.com/conversations/301802/#comment13524797
I just changed the firmware to use high drive and to tweak the duty cycle, and I'm getting around 90cm out of a standard Puck.js now!
@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.
Check out this post: http://forum.espruino.com/conversations/301802/#comment13524797
I just changed the firmware to use high drive and to tweak the duty cycle, and I'm getting around 90cm out of a standard Puck.js now!