Custome UUID with Nrdic UART SERVICE (nRF51822)

[com135]

Hello~!

I am working on modifucation code of ble_app_uart example.

nRF51822

(SDK12.3.0_d7731ad)

Softdevice 130 (v2.0)

I know the original UUIDs are provided from the example is that 

Nordic UART Service is 6E400001-B5A3-F393-E0A9-E50E24DCCA9E (16-bit offset: 0x0001).

TX Characteristic (UUID: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E)

RX Characteristic (UUID: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E)

My point is that I would like to change it to my own UUID without any changes.

MY SERVICE = "0000ff01-0000-1000-8000-00805f9b34fb"
MY READ = "0000ff06-0000-1000-8000-00805f9b34fb"
MY WRITE = "0000ff05-0000-1000-8000-00805f9b34fb"

I also have tried to change all of points that related to UUID values.

BUT When I change it, the UART function and advertising are stopped.

Please help my project kindly

Thank you. 

[Joakim Jakobsen]

Hi!

So, you are trying to add the Bluetooth SIG defined Base UUID. 

Note that the SIG defined UUID is added by default, so you should not add this again.

If you try changing the UUID to anything else, your device should be advertising as expected again.

Cheers,
Joakim.

[com135]

Thank you Sir!

I would like to ask you one more.

What does mean by “advertising as expected 

again”?  

I am a real newbe to the BT.

Please explain a little bit more about it.

Thank you.

[Joakim Jakobsen]

I simply meant that if you change the UUID to something other than the BT SIG defined base UUID, you won't run into an error and the device will start advertising again.

Cheers.