App: External input devices

what a pity that the weather isn’t good today here… :sleepy: … but the weekend is near… (nearly)… :grin:

Concerning zoom functions I have a question: how exactly does the support for external bluetooth input devices work? Many bikers use a bluetooth audio device like Sena or Cardo. The map zoom can be configured to work with the volume keys. This works when I use the volume keys of the smartphone. But it doesn’t work when I use the volume turning knob from the Sena device with which I also can control the sound volume. Is there any chance to make it feasible?