[nRF Connect SDK] How to change BT name

[Tim Hwang]

Target nRF52832(nrf52dk_nrf52832)
SDK NCS v1.9.1
Base source
1. C:\Users\user\ncs\v1.9.1\nrf\samples\bluetooth\peripheral_hids_keyboard
2. C:\Users\user\ncs\v1.9.1\nrf\samples\bluetooth\peripheral_hids_keyboard
My project require two mode(HID and NUS).

I received bt name via UART before call bt_enable(NULL);
but name information already defined at compile time.
static const struct bt_data sd[] = {
BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),
};

I found good option and API but it did not work.
CONFIG_BT_DEVICE_NAME_DYNAMIC
bt_set_name("new name")

When do I call bt_set_name() ?
Can you please guide for me?

[Tim Hwang]

Thanks for updating.

DEVICE_NAME is determined at compile time. What I'm asking you is how I can change ad[] variable in runtime.

In my test, bt_set_name() did not work.

I believe you have good solution.

[qwertynoon]

DEVICE_NAME is determined at compile time.

void main()
{
    String DEVICE_NAME = "Uart name"; // this is for example only.
                                        You can determine this variable anywhere
    uint8_t DEVICE_NAME_LEN = (sizeof(DEVICE_NAME) - 1);
    
    static const struct bt_data ad[] = {
    	BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
    	BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),
    };
    
    static const struct bt_data sd[] = {
    	BT_DATA_BYTES(BT_DATA_UUID128_ALL, BT_UUID_NUS_VAL),
    };
    
    #define BT_LE_ADV_CONN_TEST BT_LE_ADV_PARAM(BT_LE_ADV_OPT_CONNECTABLE, \
                                                   adv_param_interval_min, \
                                                   adv_param_interval_max, NULL)
    
    err = bt_le_adv_start(BT_LE_ADV_CONN_TEST, ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
    if (err) {
    	LOG_ERR("Advertising failed to start (err %d)", err);
    	return;
    }
}

[Tim Hwang]

I want to use NEW name but not DEVICE_NAME.
I'll receive new name via UART before bt_enable(). and I have to display new name

[Tim Hwang]

I found bt_set_name("NEW_NAME") worked. After connection, peer device had "NEW_NAME".

Now I have to advertise name as "NEW_NAME".

My customer will have several my BLE devices, so I have to tell them what device is working.

Thanks.

[Vidar Berg]

Hi,

Did you manage to update the adv. name dynamically as well, or is it something you are still struggling with?