When BLE is paired, advertising cannot be restarted

RE: When BLE is paired, advertising cannot be restarted

SunHuang — Thu, 06 Mar 2025 02:17:18 GMT

Hi,

I have already resolved the issue. The differences between the old and new versions made me overlook some configurations.

RE: When BLE is paired, advertising cannot be restarted

Edvin — Tue, 04 Mar 2025 10:19:30 GMT

[quote user="Edvin Holmseth"]CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=2[/quote]

Did you try this one?

[quote user="SunHuang"]BLE advertising should restart automatically[/quote]

That depends on the definition of "automatically". It needs to be done from the application, but apparently it is being done, since it fails.

But did you try the config: CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=2 ?

BR,

Edvin

RE: When BLE is paired, advertising cannot be restarted

SunHuang — Tue, 04 Mar 2025 05:46:26 GMT

Hi,

No, I did not use any features related to Matter. Please focus on the BLE advertising issue. I believe that when CONFIG_BT_MAX_CONN is greater than 1, the device should automatically restart advertising after a successful pairing.

The error message "Failed to start BLE advertising: -12" is the result of my intentional call to BleService::StartAdvertising. In reality, BLE advertising should restart automatically, but it is clear that this version of the SDK does not handle it correctly.

If I want to allow multiple pairings, besides CONFIG_BT_MAX_CONN, what other configurations are required?

RE: When BLE is paired, advertising cannot be restarted

Edvin — Mon, 03 Mar 2025 14:24:31 GMT

At this point, is the device provisioned into your Matter network, or is it not?

Best regards,

Edvin

RE: When BLE is paired, advertising cannot be restarted

SunHuang — Thu, 27 Feb 2025 01:31:16 GMT

Hi,

Yes, the example I used is NCS 2.9.0 Matter Lock. The expected state is Matter + BLE + multiple-to-one connection.

RE: When BLE is paired, advertising cannot be restarted

Edvin — Wed, 26 Feb 2025 13:52:05 GMT

[quote user="Edvin Holmseth"]

Are you doing normal BLE advertising, or do you have some other radio protocol as well?

[/quote]

So you are using Matter, right? Is that intentional, or did you choose this application because it was using C++?

RE: When BLE is paired, advertising cannot be restarted

SunHuang — Wed, 26 Feb 2025 09:19:16 GMT

Hi,

Basically, my BLE service is built based on NUS. So it's just normal advertising. What other information do you need to diagnose the issue? By the way, I don't need the CENTRAL role.

bool BleService::StartAdvertising() {
  if (madvStarted) {    
    LOG_INF("BLE advertising is already started");
    return false;
  }

  CHIP_ERROR ret = BLEAdvertisingArbiter::InsertRequest(mAdvertisingRequest);
        
  if (CHIP_NO_ERROR != ret) {
    LOG_ERR("Could not start BLE advertising");
    return false;
  }
  madvStarted = true;

  LOG_INF("BLE advertising has started");
  return true;
}

RE: When BLE is paired, advertising cannot be restarted

Edvin — Tue, 25 Feb 2025 14:18:13 GMT

Hello,

It is difficult to say without more context. What function returned the value -12? Are you doing normal BLE advertising, or do you have some other radio protocol as well?

Does your build log say anything that would suggest that the CONFIG_BT_MAX_CONN is not set to 3?

Do you support scanning/central? CONFIG_BT_CENTRAL=y?

If so, you also need to specify:

CONFIG_BT_CTLR_SDC_PERIPHERAL_COUNT=2

or whatever value you want it to be. It will default to 1 if CONFIG_BT_CENTRAL is set to y.

Best regards,

Edvin