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androidbluetoothhid

Android Bluetooth HID implementation

While my code has been running on my Android phone successfully,
I still dont understand something below..

When I look into sdp.c file, I found there are some values such as:

HIDParserVersion

//HIDParserVersion   0x0201 uint16          mandatory   4.3.2

static const uint16_t attr_parser_version = 0x0111;

I understand that 0x201 is its attribute id and 0x0111 is its attribute value.
However, I dont understand why it is necessarily to be 0x0111 as its attribute value.
One more example is that its subclass is 0xcc.

Could someone tell me: Where is the definition of these values?

Thank you

Solution

  • See the list of attributes at section "Human Interface Device Profile" in https://www.bluetooth.org/Technical/AssignedNumbers/service_discovery.htm

    See the details including the values in e.g. "HID_SPEC_V11.pdf" from https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=246761 (via https://www.bluetooth.org/Technical/Specifications/adopted.htm)