RE: Modifying the Bluetooth name in the program did not take effect.

Neo Yang — Thu, 06 Nov 2025 10:14:21 GMT

After modifying the program as you suggested, the new name was successfully changed. Thank you.

RE: Modifying the Bluetooth name in the program did not take effect.

Vidar Berg — Thu, 06 Nov 2025 06:58:48 GMT

Hello,

The problem is that the ad array (or sd if the name is placed in the scan response) still points to the original device name. I've created an example for how you can update the advertisement name based on the peripheral_lbs sample which I have included below.

devzone.nordicsemi.com/.../peripheral_5F00_lbs_5F00_udate_5F00_adv_5F00_name_5F00_3.1.1.zip

static void device_name_update(void)
{
	int err;
	static int count;
	static char new_name[BT_GAP_ADV_MAX_ADV_DATA_LEN];
	uint16_t total_payload = 0;

	memset(new_name, 0, sizeof(new_name));

	err = snprintk(new_name, sizeof(new_name), "%s_%d", DEVICE_NAME, ++count);
	if (err < 0) {
		printk("snprintk() failed. (err: %d)\n", err);
		return;
	}

	printk("New device name: %s\n", new_name);

	/* Update device name. Can be read from attribue table */
	err = bt_set_name(new_name);
	if (err) {
		printk("bt_set_name() failed. (err: %d)\n", err);
		return;
	}

	/* Update the advertisment name field in advertisment payload */
	for (int i = 0; i < ARRAY_SIZE(ad); i++) {
		if (ad[i].type == BT_DATA_NAME_COMPLETE) {
			ad[i].data = new_name;
			ad[i].data_len = strlen(new_name);
		}

		total_payload += (ad[i].data_len + 2);
	}

	err = bt_le_adv_update_data(ad, ARRAY_SIZE(ad), sd, ARRAY_SIZE(sd));
	if (err && err != -EAGAIN) {
		printk("bt_le_adv_update_data() failed. (err: %d)\n", err);
	}

	if (total_payload > BT_GAP_ADV_MAX_ADV_DATA_LEN) {
		printk("Name is too long and will be truncated\n");
	}

	printk("Primary advertisment payload size: %d\n", total_payload);
}

Best regards,

Vidar