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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.
@rj
I had a deadline creeping up on me, so I decided to give it another go myself. I averted the issue by using dfu-util on Linux 🙂. So sorry to say, no bounty this time 😊.
The tool from ST seems to only accept .dfu-files, and theres another utility in the bundle to convert from .bin to .dfu.