Setting Bluetooth Device Name in Zephyr

RE: Setting Bluetooth Device Name in Zephyr

Saleh — Tue, 16 Nov 2021 10:11:26 GMT

You can set the device name in your code by calling "bt_set_name" function, after when Bluetooth has enabled but before when advertisement has started.

Also it is necessary to enable dynamic name capability in the project configuration in addition to add BT_LE_ADV_OPT_USE_NAME to bt_le_adv_param variable.

Add these options to prfj.conf file:

....

# Enable Dynamic name modification
CONFIG_BT_DEVICE_NAME_DYNAMIC=y
# Maximum chcaracter of the device name
# (Range: 2 to 248)
CONFIG_BT_DEVICE_NAME_MAX=30

and call bt_set_name after when bt has enabled but advertisement has not started

main.c

void main(void)
{
    struct bt_le_adv_param param;
    ...
    bt_enable(NULL);
    ...
    bt_set_name("new name");
    ...
    param.options = BT_LE_ADV_OPT_USE_NAME;
    ...
    bt_le_ext_adv_create(&param, NULL, &adv_set);
    bt_le_per_adv_start(adv_set);
    
}

RE: Setting Bluetooth Device Name in Zephyr

DevinCallahan — Fri, 05 Jun 2020 19:23:15 GMT

I did try this and it didn't help on its own.

What DID help is realizing that the "Advertising Data" struct that gets passed to "bt_le_adv_start" is where the name is actually being configured. I just modified the value and length in that struct before starting the advertisement and it all worked.

I think there is a way to use "bt_set_name" but I still haven't gotten that way to work. Too many flags.

RE: Setting Bluetooth Device Name in Zephyr

haakonsh — Fri, 05 Jun 2020 12:20:12 GMT

You need to enable the config "Allow to set Bluetooth device name on runtime".

In SESne:

(top toolbar) Project --> Configure nRF Connect SDK project --> menuconfig --> type "device name" in the filter box --> enable the 'Allow to set Bluetooth device name on runtime' configuration by toggling it's button and click 'configure' afterwards.