[ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

abhiash_sl — Wed, 13 Nov 2024 13:49:26 GMT

I reviewed my code once more.

I was setting it at the beginning of the function and it was getting overwritten.

It should be like given below

// p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
p_adv_params->properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;

It works now and shows ADV_NONCONN_IND

Thanks again,

Abhi Ash

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

Hung Bui — Wed, 13 Nov 2024 13:16:39 GMT

Please attach your code where you do the modification.

I don't see a problem modifying the beacon example to stop advertising, update the advertising content and continue advertising.

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

abhiash_sl — Wed, 13 Nov 2024 13:06:32 GMT

Hi Hung,

Thanks for your response.

My requirement is just sending out advertisements in non-connectable mode only. Connectable would be never needed.

I have tried and used the beacon example however it directly uses the gap API and not the advertising library.
I need to dynamically change the beacon contents.

I inserted the line below in both fast and slow adv init functions
p_adv_params->properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;

However, sniffing the packet using the nRF Sniffer, the PDU Type is still shown as ADV_IND.
and when I observe in the nRFConnect Android App, I can see the CONNECT option besides.

May be something is still missing or going wrong

Thanks
Abhishek

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

Hung Bui — Wed, 13 Nov 2024 09:14:13 GMT

Hi AbhiAsh,
You would need to change it in set_adv_mode_fast(), set_adv_mode_slow() as well.
But I don't see the point of modifying it if you only want to do beaconing. Unless you want to support both switching between connectable and non-connectable.
Have you looked at the beacon example we have ?

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

abhiash_sl — Wed, 13 Nov 2024 08:36:23 GMT

Hello,

In ble_advertising.c, I have added the line below in both ble_advertising_init() and ble_advertising_start() functions however I still see the adverizement type as ADV_IND

p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;

Can you please guide regarding where exactly the change needs to be made to make the advertising non connectable ?

Thanks,

Regards

Abhi Ash

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

Hung Bui — Thu, 07 Nov 2024 10:07:18 GMT

[quote user="abhiash_sl"]My requirement is to update the contents of beacon (non-connectable) dynamically and how can we implement this using only softdevice APIs ( i.e. without using the advertising library )?[/quote]

I don't see any reason you can't change the content of the beacon with the Softdevice APIs.
Please be aware that the ble_advertising is just a firmware library, it uses the Softdevice APIs to do advertising.
You are free to modify the ble_advertising to do what you want. You can't change the SVC call, but you don't have to.
As I said, you can simply call sd_ble_gap_adv_stop() to stop the advertising, then change the advertising configuration/data with sd_ble_gap_adv_set_configure() then start advertising again using sd_ble_gap_adv_start()

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

abhiash_sl — Wed, 06 Nov 2024 15:23:23 GMT

Hi Hung Bui,

My requirement is to update the contents of beacon (non-connectable) dynamically and how can we implement this using only softdevice APIs ( i.e. without using the advertising library )?

"If you want to use the ble_advertising library, you would need to modify the library to support non-connectable mode. "

How is this possible for a normal user ? Some are SV calls. Is it ok to modify the ble_advdata_t ? i.e. allow more values to the .flags ? Currently it uses values from ble_gap.h

#define BLE_GAP_ADV_FLAG_LE_LIMITED_DISC_MODE (0x01) /**< LE Limited Discoverable Mode. */
#define BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE (0x02) /**< LE General Discoverable Mode. */
#define BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED (0x04) /**< BR/EDR not supported. */
#define BLE_GAP_ADV_FLAG_LE_BR_EDR_CONTROLLER (0x08) /**< Simultaneous LE and BR/EDR, Controller. */
#define BLE_GAP_ADV_FLAG_LE_BR_EDR_HOST (0x10) /**< Simultaneous LE and BR/EDR, Host. */
#define BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE (BLE_GAP_ADV_FLAG_LE_LIMITED_DISC_MODE | BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED) /**< LE Limited Discoverable Mode, BR/EDR not supported. */
#define BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE (BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE | BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED) /**< LE General Discoverable Mode, BR/EDR not supported. */

Thanks,

Abhi Ash

RE: [ nRF52833 ] How to set Non-Connectable Advertizing using Advertising Library / Module

Hung Bui — Wed, 06 Nov 2024 14:54:12 GMT

Hi Abhi,
For doing non-connectable advertising, it's suggested to use the softdevice APIs directly, similar to what in the ble_app_beacon example. You can configure advertising using sd_ble_gap_adv_set_configure() and start advertising using sd_ble_gap_adv_start().

If you want to use the ble_advertising library, you would need to modify the library to support non-connectable mode.