Then you get this tool from ST, download it, run it, give it the Espruino binary and point it at COM7.
@Gordon started
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.
Then you get this tool from ST, download it, run it, give it the Espruino binary and point it at COM7.