Is their any chance to update manufacture field independently

[Raj]

Hi, In my project I need to measure current values for every sec and update those values to advertising data. So, I take manufacture field in advertising data to update the current values my advertising update function is shown below

static void updateAdData ( void )
 {



	 uint32_t      err_code;
	 ble_advdata_t advdata;
	 ble_advdata_t scanrsp;
	 ble_advdata_manuf_data_t manuf_specific_data;

	 int8_t	   tx_power_level = TX_POWER_LEVEL;

	 // YOUR_JOB: Use UUIDs for service(s) used in your application.
	 static ble_uuid_t m_adv_uuids[] = {{BLE_UUID_CURR_SERVICE, BLE_UUID_TYPE_BLE}}; /**< Universally unique service identifiers. */

	 // Build advertising data struct to pass into @ref ble_advertising_init.
	 manuf_specific_data.company_identifier = 0x02F4;
	 manuf_specific_data.data.p_data =  mf_Data;
	 manuf_specific_data.data.size   = sizeof(mf_Data);

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

	 advdata.name_type               = BLE_ADVDATA_FULL_NAME;
	 advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
	 advdata.p_manuf_specific_data   = &manuf_specific_data;

	 memset(&scanrsp, 0, sizeof(scanrsp));
	 scanrsp.p_tx_power_level		 = &tx_power_level;
	 scanrsp.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
	 scanrsp.uuids_complete.p_uuids  = m_adv_uuids;


	 ble_advdata_conn_int_t connintvls;
	 connintvls.min_conn_interval = MIN_CONN_INTERVAL;
	 connintvls.max_conn_interval = MAX_CONN_INTERVAL;
	 scanrsp.p_slave_conn_int 	  = &connintvls;

	 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_DEFAULT;

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

}

The above function is working well but my concern is I am always changing manufacture field only so, is their any way to set only manufacture field rather than complete advertising data to avoid the unnecessary initialization's every time. And I known it is easy by taking advdata and scasnrsp variables as global but I want is their any possible way with sd functions.

[atune]

ble_advertising.h isn't really suited for your use case methinks. You should probably write your own library to handle initialization and writing the manuf data, or modify ble_advertising to provide a function to only change the manuf data. You always need to have the advdata information handy anyway, but you can write just the advertisement or scan response data with ble_advdata_set (which uses sd_ble_gap_adv_data_set after parsing the bytearray from the provided ble_advdata_t structs).

You can use ble_advdata_set with your current setup, it will change the advertisement data just fine. However whenever you use ble_advertising_start, ble_advertising will overwrite the adv/sr data with the values you wrote at init.