Maximum number of custom service

[Arthur_lelong]

hello,

I try to make an application with 6 different services. I used the ble_custom_service tutorial to create my different services.

I manage to work without problems with 5 services but when I try to add the last one, the bluetooth is no longer visible.

I would like to know what the problem is, what limits me in my service additions ? 

thanks for yours help ! 

[Hung Bui]

Hi Arthur, 

You would need to increase the NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE in sdk_config.h . Note that when you increase the NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE you would also need to increase the softdevice's allocated memory in project setting (the start address of RAM for application).

[Arthur_lelong]

Hi, thank you for your reply, 

how to make the link between the NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE  and the RAM_START ?? 

Actually i have: 

FLASH_PH_START=0x0

FLASH_PH_SIZE=0x80000

RAM_PH_START=0x20000000

RAM_PH_SIZE=0x10000

FLASH_START=0x26000

FLASH_SIZE=0x5a000

RAM_START=0x20002a98

RAM_SIZE=0xd568

i took that from the ble_app_uart example configuration but i don’t really understand how it works. 

Thank you 

[Hung Bui]

If there is not sufficient RAM for the softdevice you will receive an error and in the log you will find which RAM size you need to modify to. Have a look at nrf_sdh_ble_enable() function inside nrf_sdh_ble.c 

[Arthur_lelong]

it's working fine now 

thank you for your help  ! 

Cordially