I've yet to try SWD test points with blackmagic probe tonight but if it works it is sure thing :-)
And BTW if you don't like heart rate sensor and the wristband/usb charging type, there is almost identical one - Lenovo HX06 which is a bit different, however it is more expensive even when on sale and it is not on sale so often https://www.gearbest.com/smart-watches/pp_1830584.html?wid=1433363 This HX06 one has FCC ID https://fccid.io/2AEMN-D16 according to photos in user reviews.
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 a heads up - if anyone wants Nordic bracelet with BW oled screen there is N52832 based one currently on sale here https://www.gearbest.com/smart-watches/pp_1232618.html?wid=1433363
My photo with front glass removed https://pasteboard.co/HMcXmdl.jpg is matching the board
photo on FCC site https://fccid.io/png.php?id=3414019&page=2 so the other side most probably looks like this https://fccid.io/png.php?id=3414019&page=3 :-)
For more details see my findings here https://gitter.im/nRF51822-Arduino-Mbed-smart-watch/Lobby?at=5be3fbf36b9822140df92510
I've yet to try SWD test points with blackmagic probe tonight but if it works it is sure thing :-)
And BTW if you don't like heart rate sensor and the wristband/usb charging type, there is almost identical one - Lenovo HX06 which is a bit different, however it is more expensive even when on sale and it is not on sale so often https://www.gearbest.com/smart-watches/pp_1830584.html?wid=1433363 This HX06 one has FCC ID https://fccid.io/2AEMN-D16 according to photos in user reviews.