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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.
@dzhu
Oh, that's neat, I didn't know the JS version was used that way. I suppose that should be fixable (maybe not function names in stack traces), seeing how Node can run WebAssembly too, and I wouldn't consider the job done until such things were addressed, but I can certainly agree we're into not-worth-it territory.
Anyway, web emulator and underlying technology aside, I hope someone will get some use out of this emulator in its own right! To expand on the benefits a bit more, I've found that the firmware for the real device takes about 40 seconds to build (even for an incremental build -- the final link step is most of it) and over 30 seconds to upload, while rebuilding for this takes 3 seconds and the emulator can be restarted instantly. Plus I don't have to squint at the rather small watch screen or wait for files to transfer over Bluetooth all the time.