You can DIY a cable yourself with some pogo pins :) The one I did wasn't magnetic so I had to spend half an hour just pressing down on the pogo and the watch, but it shouldn't be that complicated to create a harness that can clamp down on both the watch and the pins.
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.
You can DIY a cable yourself with some pogo pins :) The one I did wasn't magnetic so I had to spend half an hour just pressing down on the pogo and the watch, but it shouldn't be that complicated to create a harness that can clamp down on both the watch and the pins.