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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.
@Gordon
If you update Bootloader and Settings now you'll find that the 'Beep' option in Settings gives the option of Piezo or Vibrate (it defaults to Vibrate). When you change setting it'll give you a test tone, so if you have a device with a Piezo you can see, and you can also see the difference.
I added the option because actually in a lot of cases you might want to use the Vibration motor as a speaker and then have the piezo pins available for adding some external components.