Bangle.js 2 replacing vibration motor with a buzzer

@halemmerich, yes, I saw your post for the custom case. That looks pretty good.

Here is the function to drive the piezo.

function piezoBuzz(pin, frequency, times, duration, pause) {
  let count = 0;

  function buzz() {
    if (count < times) {
      analogWrite(pin, 0.5, {
        freq: frequency
      });
      setTimeout(() => {
        analogWrite(pin, 0);
        setTimeout(() => {
          count++;
          buzz();
        }, pause);
      }, duration);
    }
  }
  buzz();
}

And here is an example to call the function.

piezoBuzz(D43, 5600, 2, 200, 200); //UATX pin, 5.6kHz, twice, 200ms pulse, 200ms pause