When trying to add more than 4 characteristics, fatal error comes and BLE crash.

[Pooja Uchagaonkar]

Hi, Greetings !

I have totally 3 services and 8 characteristics added in my project. In first service there are 2 characteristics, 2^nd service there are 5 characteristics added and third one is battery service only with 1 characteristics.

Previously when I was going to add 4 th characteristics of service 2, error occurred due to RAM and STACK size limitation. But that time I was fix it by doing respective RAM size changes. But this time the error is different and I can’t figure it out.

When I added 5^th service in 2^nd characteristics the program is crashed and fatal error seen. But it not giving RAM size limitations. I checked with breakpoint and it returns error when adding 5^th characteristics in ble_services_int() procedure.

err_code = characteristic_add(p_epls->service_handle, &add_char_params, &p_epls>lock_status_handles);

if (err_code != NRF_SUCCESS)

{

return err_code;

}

When I not added 5^th characteristics everything works fine. I searched about this on forum and tried with many given solution but nothing works. Also I tried with changing following parameters.

The settings in sdk_config.h file like this -

#define NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE 1408" and "#define NRF_SDH_BLE_VS_UUID_COUNT 10

Thanks,

Pooja Uchagaonkar

[Pooja Uchagaonkar]

Hi

I was able to fixed this problem. Here I made changes in  NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE 1408 to 2000 and again here I got error in ble_stack_init due to memory limitation. Now I can able to see all characteristics and services after done changes in RAM size as per nRF log. 

So due to the Attribute Table Size limitation this error happened. 

Thanks