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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.
@Serj
I'm just thinking why a speaker is needed in a new B.js 3 watch, f.e.:
To quickly find the watch (you can set a signal to BT disconnect, for example);
For alarm;
For games (simple music like a midi, sfx), MIDI support would be cool;
For a speech synthesizer, for example, to tell the current time;
For extreme situations, if the speaker is loud enough, it can be used when a person lost in the forest or to be more noticeable when riding a bicycle at night or as a bicycle bell (nothing unusual is needed here, just a loud squeak).
Your options :)