how to change the lenth of UUID

RE: how to change the lenth of UUID

jerly — Fri, 15 May 2015 01:49:04 GMT

OK.thand you again.i will read that documentation.and hope i can be clear on that.

RE: how to change the lenth of UUID

endnode — Thu, 14 May 2015 11:12:36 GMT

I believe you want to create 128-bit UUID for your custom service/characteristics because 16-bit values are derived from standard BT SIG 128-bit UUID and should be used for standard services used by defined profiles. Have you read Nordic's documentation to the SDK here and "Creating Bluetooth low energy applications using nRF51822" Application Note from Nordic (nAN-36, v1.1, chapter 2.2.4)?

RE: how to change the lenth of UUID

jerly — Thu, 14 May 2015 10:56:01 GMT

Hi jan:

thank you for your answer.i am sorry about that.i have thought the length was changed freely. and now if i want to set the length to be 16bit .how to do it.

RE: how to change the lenth of UUID

endnode — Thu, 14 May 2015 08:44:30 GMT

Hi Jerly,

but isn't it so that BLE defines only either 128-bit (16B) or 16-bit (2B) UUIDs? I doubt you can set your custom length.

Cheers Jan