Is there a code example of how to use uuids_more_available

[Andreas]

Hello,

at the moment I try to add some more services to my BLE device. This goes wrong with err_code = 12 (NRF_ERROR_DATA_SIZE). With some search in the devZone I found out, that it is not possible to advertise more than two uuids because of the size limitation. Also I found out, that if I want to have more than two Services, I have to use uuids_more_available. But I didt found a simple code example of how to do that. I tried it like this:

static void advertising_init(void){
uint32_t      err_code;
ble_advdata_t advdata;
	ble_advdata_t scanrsp;
	
	ble_uuid_t adv_uuids[] = {{BLE_UUID_DEVICE_SERVICE, GRL_DEV_SERVICE_UUID_TYPE},{BLE_UUID_SERVICE_COMMAND, GRL_COM_SERVICE_UUID_TYPE}};

// Build and set advertising data.
memset(&advdata, 0, sizeof(advdata));
advdata.name_type             = BLE_ADVDATA_FULL_NAME;
	advdata.include_appearance      = true;
advdata.flags                 = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
	
	memset(&scanrsp, 0, sizeof(scanrsp));
//scanrsp.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
//scanrsp.uuids_complete.p_uuids  = adv_uuids;
	scanrsp.uuids_more_available.uuid_cnt = 3; // new
	scanrsp.uuids_more_available.p_uuids  = adv_uuids;
	
	ble_adv_modes_config_t options = {0};
options.ble_adv_fast_enabled  = BLE_ADV_FAST_ENABLED;
options.ble_adv_fast_interval = APP_ADV_INTERVAL;
options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;

err_code = ble_advertising_init(&advdata, &scanrsp, &options, on_adv_evt, NULL);
APP_ERROR_CHECK(err_code);}

But that doesn`t work. Anyway I get the NRF_ERROR_DATA_SIZE when I come to my services_init() function and try to add my service with sd_ble_uuid_vs_add(&com_base_uuid, &p_com->uuid_type);.

Thanks for any help.

Regards, BTprogrammer

[Andreas]

No, I`m using the S120 as an peripheral.

[Petter Myhre]

So sd_ble_gatts_characteristic_add() returns NRF_ERROR_DATA_SIZE? You haven't included that part of the code. NRF_ERROR_DATA_SIZE means Invalid data size(s) supplied. What arguments are you supplying to sd_ble_gatts_characteristic_add()?

[Andreas]

Hello, yes, I get the err_code=12 when calling sd_ble_characteristic_add(). This is done in the direction_char_add(...) function.

static uint32_t direction_char_add(ble_command_t * p_com, const ble_command_init_t * p_com_init){
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t    attr_char_value;
ble_uuid_t          ble_uuid;
ble_gatts_attr_md_t attr_md;
	uint32_t   err_code=0;
	int i=0;

	for(i=0;i<4;i++)
	{
		commandDirection[i]= i;
	}

memset(&cccd_md, 0, sizeof(cccd_md));

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);

cccd_md.vloc = BLE_GATTS_VLOC_STACK;

memset(&char_md, 0, sizeof(char_md));

char_md.char_props.notify = 1;
	char_md.char_props.read = 1;
char_md.p_char_user_desc  = NULL;
char_md.p_char_pf         = NULL;
char_md.p_user_desc_md    = NULL;
char_md.p_cccd_md         = &cccd_md;
char_md.p_sccd_md         = NULL;

ble_uuid.type = p_com->uuid_type;
ble_uuid.uuid = BLE_UUID_DEV_COMMAND_DIRECTION_CHAR;

memset(&attr_md, 0, sizeof(attr_md));

BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);

attr_md.vloc    = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen    = 1;

memset(&attr_char_value, 0, sizeof(attr_char_value));

attr_char_value.p_uuid    = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len  = (4*sizeof(uint8_t));
attr_char_value.init_offs = 0;
attr_char_value.max_len   = BLE_COMMAND_MAX_DIRECTION_LEN;
	attr_char_value.p_value = commandDirection;

	err_code = sd_ble_gatts_characteristic_add(p_com->service_handle,
                                       &char_md,
                                       &attr_char_value,
                                       &p_com->direction_handle);
	
	if (err_code != NRF_SUCCESS)
{
    printf("err_code_direction_char_add=%d\r",err_code);
			return err_code;
}

}

So in this function I get the printf "err_code_direction_char_add=12" on the terminal. I had a look on the types of the parameters given to sd_ble_gatts_characteristic_add(...). For me it looks ok...

[Petter Myhre]

Looks ok. Could you upload your complete project so I can have a test it here? You can also share it confidentially in a private support case through your MyPage account at nordicsemi.com, if you do, please refer to this question.

[Petter Myhre]

This question was answered through a MyPage support case.