Adding custom UUID in the advertisement packet

[Nabeel Ar]

Board: nRF52810

SoftDevice: s112

SDK version: 17.0.2

I'm trying to add a custom UUID in the advertisement packet and scan for the custom UUID in the central device to connect with it. I've followed the steps as given in the Tutorial. But my application gets asserted when entering the advertising_start() function. 

Is it necessary to add my custom UUID in service init because I am only using it for connection purposes?

How can solve this problem?

In central, how can I scan for the custom UUID?

Thanks in advance.

[Vidar Berg]

Hello,

Is it necessary to add my custom UUID in service init because I am only using it for connection purposes?

No, it's only if the central needs the UUID to recognize your device. The central may also recognize it from the device name, address, etc.

my application gets asserted when entering the advertising_start() function. 

Sure you are not getting the assert in advertising_init()? Either way, please include your code here so I can have a look.

[Nabeel Ar]

Hi Vidar,

Vidar Berg said:

Sure you are not getting the assert in advertising_init()?

Yes, It gets asserted when I try to add base uuid in the ble stack.

SVCALL(SD_BLE_UUID_VS_ADD, uint32_t, sd_ble_uuid_vs_add(ble_uuid128_t const *p_vs_uuid, uint8_t *p_uuid_type));

[Vidar Berg]

Does it return NRF_ERROR_NO_MEM? In that case, you have to increase the NRF_SDH_BLE_VS_UUID_COUNT in your sdk_config.h and probably adjust the RAM start address (see debug log for details).

[Nabeel Ar]

I've increased the count in sdl_config.h file NRF_SDH_BLE_VS_UUID_COUNT. Now it works fine. But in the advertisement packet the CUSTOM_SERVICE_UUID (16 bit UUID) is embedded into the UART base UUID (I'm also using this service but don't want to advertise it) but not my custom UUID that I've added.

How to add my custom UUID in the advertisement packet? 

[Vidar Berg]

Please post your main.c file.