Maximum length of manufacturer specific data

RE: Maximum length of manufacturer specific data

ProfNocturne — Wed, 08 May 2024 09:47:54 GMT

I checked it again:

I did a pristine build in VS Code
I used Erase and Flash and after that Debug.
(Also Debugging with Ozone showed the same error.)

After that I had a deeper look in the prj.conf-File:

CONFIG_BT_CTLR_ADV_EXT=y and CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=1650 were marked with a warning.

I removed CONFIG_BT_CTLR_ADV_EXT=y and copied CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=1650 to the child image config file hci_rpmsg.conf

I had to change the file name hci_rpmsg.conf to hci_ipc.conf.

After that the example worked as intended and helped me to answer my question.

Regards

Jan

RE: Maximum length of manufacturer specific data

Kenneth — Tue, 07 May 2024 10:52:34 GMT

The `bt_le_ext_adv_create()` function can return error code -5 (EIO) when there's an issue with the Bluetooth controller. This can happen when the controller doesn't recognize the opcode for setting extended advertising parameters. This suggests that support for the extended advertising feature has not been enabled in the Bluetooth controller running on the network core (see following case for details:Identical code to Peripheral HR Coded sample not working in my own project ).

In another case, the error was resolved by using the "Erase and Flash" action, suggesting that there might have been some old data in the network core or elsewhere that was causing the issue (see following case for details: Error when trying to enable extended advertising on code based on NUS example ).

Therefore, if you're encountering error -5 with `bt_le_ext_adv_create()`, you should check that extended advertising is indeed enabled, that there's no old data causing issues.

Kenneth

RE: Maximum length of manufacturer specific data

ProfNocturne — Tue, 07 May 2024 07:24:34 GMT

Hello,

I tried the following example which Hung Bui provided in your linked discussion:

5305.peripheral_hr_chained.zip

I built it with SDK 2.6.1. But I got an error during Debugging when the advertising information is created. (

(main.c, line 110: err = bt_le_ext_adv_create(&param, NULL, &adv); => function returns with err = -5)

static int create_advertising_chained(void)
{
	int err;
	struct bt_le_adv_param param =
		BT_LE_ADV_PARAM_INIT(BT_LE_ADV_OPT_USE_NAME | BT_LE_ADV_OPT_USE_IDENTITY |
				     BT_LE_ADV_OPT_EXT_ADV 
				     ,
				     BT_GAP_ADV_FAST_INT_MIN_2,
				     BT_GAP_ADV_FAST_INT_MAX_2,
				     NULL);

	err = bt_le_ext_adv_create(&param, NULL, &adv);
	if (err) {
		printk("Failed to create advertiser set (err %d)\n", err);
		return err;
	}

Could you clarify if this example runs on the nrf5340 DK?

Regards

Jan

RE: Maximum length of manufacturer specific data

Kenneth — Thu, 02 May 2024 11:54:25 GMT

Hello,

Please see discussion here: Chaining - current status

tldr; You can't send it in one advertisment, but need to split it in two (chained advertisment).

Kenneth