Device Name Change

[venu gopal]

Hi all ,

I'm using SDK 15.0, working on ble_uart.c

I need to change the DEVICE  NAME of the  frequently.

Can you please tell me how to change the the device name and store it in a buffer.

If you provide a example code, it will be a great help.

Thanks and Regards,

 Venu

[Arya]

Hi Martin,

Can you elaborate a little bit about the APIs to use to disable, re-initialize, and start advertising again?  I am actually trying to do the same but unable to find the error?

[saka4849]

Hi Arya,

You will need to call sd_ble_gap_adv_stop() after you have changed the name with sd_ble_gap_device_name_set().

See this thread for more info.

[Atok]

Hi venu gopal

I found myself in the situation to implement a dynamically updating device name. Here some working, user-friendly code. The idea is to reuse the ble_advertising_init_t struct from initialization:

#include "nrf_sdh_ble.h"


BLE_ADVERTISING_DEF(m_advertising);
static ble_advertising_init_t adv_init;

/* This function will update the device name and advertising data accordingly. */
void bluetooth_update_name(uint8_t* name) {
	ret_code_t err_code;
	ble_gap_conn_sec_mode_t sec_mode;

	BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&sec_mode);

	if (current_config.name[0] != '\0') {
		err_code = sd_ble_gap_device_name_set(&sec_mode, name, strnlen(name, 10));
		APP_ERROR_CHECK(err_code);
	}
	else {
		err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)NUS_DEVICE_NAME, strlen(NUS_DEVICE_NAME));
		APP_ERROR_CHECK(err_code);
	}


  //sd_ble_gap_adv_stop(&m_advertising.adv_handle);

	err_code = ble_advdata_encode(&adv_init.advdata, m_advertising.enc_advdata, &m_advertising.adv_data.adv_data.len);
	VERIFY_SUCCESS(err_code);

	if (m_advertising.adv_modes_config.ble_adv_extended_enabled == true)
	{
#ifdef BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED;
#else
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
#endif // BLE_GAP_ADV_SET_DATA_SIZE_EXTENDED_CONNECTABLE_MAX_SUPPORTED
	}
	else
	{
		m_advertising.adv_data.scan_rsp_data.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX;
	}

	err_code = ble_advdata_encode(&adv_init.srdata,
		m_advertising.adv_data.scan_rsp_data.p_data,
		&m_advertising.adv_data.scan_rsp_data.len);

	sd_ble_gap_adv_set_configure(&m_advertising.adv_handle,
		m_advertising.p_adv_data,
		NULL);
}


/* This is my initialization routine for advertising */
static void advertising_init(void) {
	uint32_t err_code;

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

	adv_init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
	adv_init.advdata.include_appearance = false;
	adv_init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

	adv_init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
	adv_init.srdata.uuids_complete.p_uuids = m_adv_uuids;

	adv_init.config.ble_adv_fast_enabled = true;
	adv_init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
	adv_init.config.ble_adv_fast_timeout = APP_ADV_DURATION;

	adv_init.evt_handler = on_adv_evt;

	err_code = ble_advertising_init(&m_advertising, &adv_init);
	APP_ERROR_CHECK(err_code);

	ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

If you have some questions, please ask right away

Best regards

Markus, Technokrat GmbH

[ps_anu]

hi atok... i need your help pls . i need to change the device name using ble app uart

[Atok]

Hi pspavi
What do you intend to do?

Best regards

Markus, Technokrat GmbH