the HID key “codes" are defined in the HID Usage Tables e.g. http://www.usb.org/developers/devclass_docs/Hut1_12v2.pdf On 07 Apr 2014, at 13:26, Aaron Xu <overheat1984@gmail.com> wrote:

Hi Matthias,

Thanks a lot! This is very smart, and I am bright ：）

In addition, where is the key number which is keyboard's code. I saw some key number in a example code, for example 0x08 means "e", 0x0b means "h", 0x28 means "return". But I can't find "volume up" in that BLE keyboard example.

Where can I get the HID key number for iOS?

Regards, Aaron

2014-04-07 17:00 GMT+08:00 Matthias Ringwald <matthias@bluekitchen-gmbh.com>: Hi Aaron

just a shot in the dark. iOS HID driver accepts volume up events and also supports HID over LE as far as I know. So, if you implement an LE HID Keyboard and send the volume up, you should be fine.

best matthias

On 07 Apr 2014, at 01:29, Aaron Xu <overheat1984@gmail.com> wrote:

...

Hi,

Is there any function to control iPhone's volume + button through my BLE device?

I want to develop a gadget, which control iPhone to take photo. I think it will work if I open the Camera APP on iPhone and "press" the volume + button by my BLE device.

Any solution for this? Please let me know.

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