change the device name while connected

[alex kim]

Hi,

I am using 

• nRF52840
• SDK 15.3.0
• Keil IDE
• The soft device is S140 
• JLinkRTTViewer for debug

I changed the device name while not connected.

but, The device made a connection with the smartphone.

and I tried to change the device name using the same function as above.

a fatal error occurs when executing the function.

please advice

-----------

void re_device_name(void)
{
uint32_t err_code;
ble_advertising_t * const p_advertising = NULL;

*p_advertising = m_advertising;
(void) sd_ble_gap_adv_stop(p_advertising->adv_handle);
bluetooth_update_name(m_system_data.equip_name);

advertising_init();
err_code = ble_advertising_restart_without_whitelist(&m_advertising);
}

[awneil]

alex kim said:

smartphone

Note that smartphones are likely to cache device names - so may not notice a change ...

alex kim said:

a fatal error occurs

Where, exactly, does it occur?

Have you looked up the error code that you get?

[alex kim]

Hi, awneil

Sorry for the late reply.
The error code is 0x12.
Please refer to the screen capture.

When I call re_device_name() to change the device name,
 an error occurs like a screen capture.

[Kenneth]

I assume that is is the sd_ble_gap_device_name_set() that return NRF_ERROR_DATA_SIZE. Not quite sure what may trigger that, but likely a parameter in sd_ble_gap_device_name_get() is wrong. You an refer to gap_params_init() on example.

Kenneth

[alex kim]

Hi, Kenneth

Thanks for the answer.

Changing the device name works well when the smartphone is not connected.

I have attached the gap_params_init() function.

void gap_params_init(void)
{
    ret_code_t              err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

	get_ble_device_name();	
    err_code = sd_ble_gap_device_name_set(&sec_mode,
//                                          (const uint8_t *) device_name,
                                           device_name, strlen( (char const *)device_name));
	NRF_LOG_INFO("device_name= 0x%x", strlen( (char const *)device_name))
										  
    APP_ERROR_CHECK(err_code);

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

    gap_conn_params.min_conn_interval = m_scan.conn_params.min_conn_interval;
    gap_conn_params.max_conn_interval = m_scan.conn_params.max_conn_interval;
    gap_conn_params.slave_latency     = m_scan.conn_params.slave_latency;
    gap_conn_params.conn_sup_timeout  = m_scan.conn_params.conn_sup_timeout;

    err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
    APP_ERROR_CHECK(err_code);
}

Alex

[Kenneth]

I suggest you share a simplified example I can unzip to the RF5 SDK v15.3 and run on an nRF52-DK to recreate the issue.

Best regards,
Kenneth