Bluetooth HID Command for iPhone Camera Zoom Control

[sakibnaz]

Hi all, not sure if its the place to ask this question ..

I am working on a project to remotely control iPhone cameras via Bluetooth. I can already emulate the shutter button using the Volume Up HID command (0xE9). However, I’m looking for a way to also control Zoom In/Out and Focus.

I’ve seen some remote shutter products on the market that can handle Zoom In/Out and Focus remotely.

Does anyone know how they achieve this? Is there any specific HID Command for this actions?

Thanks.