This is me now but using an iPhone...for anyone stumbling on this later it appears that 2% get transferred each time you hit retry (while using nRD Toolbox) you just need to tap x50 for the whole firmware to transfer and then it seems to update successfully. shrugs
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.
This is me now but using an iPhone...for anyone stumbling on this later it appears that 2% get transferred each time you hit retry (while using nRD Toolbox) you just need to tap x50 for the whole firmware to transfer and then it seems to update successfully. shrugs