Just to add - @micooke has been compiling information on all these nRF5x based watches here: https://github.com/micooke/arduino-nRF5-smartwatches
He's working on Arduino IDE support, but there's also a table of pinouts which would be amazingly useful for anyone looking to port Espruino.
@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.
Just to add - @micooke has been compiling information on all these nRF5x based watches here: https://github.com/micooke/arduino-nRF5-smartwatches
He's working on Arduino IDE support, but there's also a table of pinouts which would be amazingly useful for anyone looking to port Espruino.