Probably should practice on a cheap nrf board first...
I'd always suggest just buying an nRF52832DK - you can practice and then you can even wire it up as a programmer to program the watch.
However I do now have 100 of the SMA Q3 watches here in the UK, and I'm getting ready to put them (pre-programmed, with bootloader) in the shop. I've just been making a few changes recently to try and get the software polished a bit more.
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 always suggest just buying an nRF52832DK - you can practice and then you can even wire it up as a programmer to program the watch.
However I do now have 100 of the SMA Q3 watches here in the UK, and I'm getting ready to put them (pre-programmed, with bootloader) in the shop. I've just been making a few changes recently to try and get the software polished a bit more.