I want to change characteristics UUID

[Prerit]

Hi ,

I have one 128 bit  base UUID  something like

{0x07, 0x89, 0x1a, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,

 0xaa , 0xaa, 0xaa, 0xaa, 0xaa, 0x8a, 0xe1, 0xbc } ;

And custome service UUID'S are like .....

Custom service UUID....  0x1831

Custom random read UUID ...0x1832

Custom value char write UUID...0x1833

So now my question is while ble is advertising characteristics UUID will be displayed as following 

bce11831 aaaa aaaa aaaa aaaaaa1a8907

bce11832 aaaa aaaa aaaa aaaaaa1a8907

bce11833 aaaa aaaa aaaa aaaaaa1a8907

Here it is changing first 16 or 32 bites from base uuid , but i have one client Application which is taking uuids with last 16 or 32 bits changes from base uuid . 

(For ex ..

bce18aaa aaaa aaaa aaaa aaaaaa1a1831

bce18aaa aaaa aaaa aaaa aaaaaa1a1832

bce18aaa aaaa aaaa aaaa aaaaaa1a1833 )

So

1) is it possible to change characteristic  UUIDs like above ?

2) is there any other solution so that i can use same thing with nrf52840? 

3) any library functions or library available for that??

4) the way i am currently using in my Application  is standard or not?

[Simonr]

Hi

1. Yes, this should be possible. Take a look at my colleague's ble service tutorial where this is done.

2. Why would this not work with the nRF52840 as well?

3. This is also covered in the ble service tutorial mentioned earlier.

4. I am afraid I don't understand what you mean by this. The way you are using what in your application?

Best regards,

Simon